記述言語：英語   掲載種別：記事・総説・解説・論説等（その他）

Solid electrolyte-based electrochemical devices fabricated with Na3Zr2Si2PO12 (NASICON), and perovskite-type oxide electrodes have been systematically examined. The elements attached with the perovskite-type oxides [A1−xA'xBO3] (A = La, Nd and Y, A' = Ca and Sr., B = Co, Cr, Fe, Ni, Mn and Ru, x = 0–0.4) exhibited rather good performance for the electromotive force responses which were almost linear to the logarithm of NO or NO2 concentration. Among sensors attached with various electrodes, the device using the NdCrO3 electrode gave the excellent NO sensing properties. © 2023 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

DOI： 10.1002/tee.23792

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記述言語：英語   掲載種別：研究論文（学術雑誌）

Electrochemical conversion of CO2 into renewable fuels is a critical area of research that poses significant scientific challenges. Herein, we investigated the impact of oxygen functional groups on the graphene support material in Sn/graphene composites. We discovered that the electrocatalytic performance of these composites could be adjusted by altering the structure of the metals and the support material, specifically graphene oxide. Our results revealed that Sn nanoparticles anchored on epoxy-functionalized graphene oxide facilitated the efficient generation of formic acid, achieving a remarkable faradaic efficiency (FE) of 75% and a high current density of −20 mA cm−2 at 1.6 V vs. Ag/AgCl. The use of the gas diffusion electrode coupled with Sn/graphene composites was effective in reducing CO2. Notably, the interaction between Sn and the support material played a vital role in determining the catalytic activity and selectivity of the formic acid. This study underscores the crucial role of support materials in electrocatalytic performance and offers insights into how to tailor the support material to optimize the conversion of CO2 into renewable fuels.

DOI： 10.1039/d3se00781b

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担当区分：筆頭著者   記述言語：英語   掲載種別：記事・総説・解説・論説等（学術雑誌）

CiNii Research

記述言語：英語   掲載種別：研究論文（学術雑誌）

<p>Transition metal-tungsten nitrides (CrWN₂, MnWN₂, FeWN₂, Co₃W₃N, Ni₂W₃N) could be synthesized and electrocatalytic properties on electrochemical oxygen reduction and evolution reactions were examined. The oxygen reduction performance was in the order of Co₃W₃N > MnWN₂ > Ni₂W₃N ≫ FeWN₂ ≫ CrWN₂. While the oxygen evolution was in that of Co₃W₃N ≫ CrWN₂ > Ni₂W₃N > MnWN₂ ≫ FeWN₂. Then, the Co₃W₃N gave high bi-functional oxygen electrocatalytic properties. Furthermore, Ni-doped (Co₁₋<i>_x</i>Ni<i>_x</i>)₃W₃N (<i>x</i> = 0–1.0) were prepared and it was found that the (Co_0.6Ni_0.4)₃W₃N gave the highest bi-functional electrocatalytic properties. The cathode performance was achieved with the electrode containing 32 wt% (Co_0.6Ni_0.4)₃W₃N, i.e., the current density as high as 280 mA cm⁻², which was 10 times higher than that of a carbon-only electrode, was obtained at (0.80 V vs. RHE) in 5 mol L⁻¹ KOH at 70 °C. Also, the (Co_0.6Ni_0.4)₃W₃N electrode showed high activity to oxygen evolution as high as 300 mA cm⁻² at (1.60 V vs. RHE). As it was observed the changes in binding energy at O_1s, N_1s, W_4f, Co_2p, and Ni_2p spectra among Co₃W₃N, (Co_0.6Ni_0.4)₃W₃N, and Ni₂W₃N by X-ray photoelectron spectroscopy, the change in electrical properties at the surface of the nitrides should be one of the reasons of the high performance.</p>

DOI： 10.5796/electrochemistry.22-00056

CiNii Research

記述言語：英語   掲載種別：研究論文（学術雑誌）

<p>The effects of metal-nitrate receptors on the NO_X sensing properties of an impedancemetric solid-state sensor were investigated using a solid Li_1.5Al_0.5Ti_1.5(PO₄)₃ (LATP) electrolyte disc as an impedance transducer and various metal nitrates as receptors. Although most of the metal nitrates could not act as sensor receptors, an LATP-based sensor with KNO₃ exhibited high sensitivity to NO and NO₂ at 300 °C.</p>

DOI： 10.1541/ieejsmas.142.13

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CiNii Research

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記述言語：英語   掲載種別：研究論文（学術雑誌）

Detection of nitrate-ion has been becoming important for various industrial fields and natural water systems. In this study, electrochemical nitrate-ion sensors based on Cu-based spinel-type oxide thick-films have been investigated. Spinel-type oxide fine powders prepared by a polymer precursor method at 550°C were used for screen printing to prepare thick-film devices. Among the spinel-type oxides tested, the CuCo2O4-based device showed relatively good amperometric response to nitrate-ion between 1.0×10-4 and 1.0×10-2 M at pH = 5 among the tested NO3-. Cl-, and H2PO4-. The 90% response time of the sensor device was as short as about 30 s at room temperature.

DOI： 10.1541/ieejsmas.142.308

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記述言語：英語   掲載種別：研究論文（学術雑誌）

Nano Co-metal doped carbon powder could be prepared by a carbon-combustion method using large surface area carbon loaded with Co-nitrate. The Co-carbon thick-film sensor prepared by screen printing method showed relatively good response of potentiometric sensing to hydrogen-phosphate ion in the concentration range between 3.0×10-4 M and 1.0×10-2 M at pH = 5 with high selectivity among the tested anions; NO3 -, Cl-, Br-, HCO3 -, and CH3COO-. The 90% response time of the sensor device was as short as about 3 min at room temperature.

DOI： 10.1541/ieejsmas.141.310

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

Sodium rare-earth silicate with Na DySi O components is known as a highly conductive and stable sodium ion solid electrolyte though are difficulties in obtaining a single-phase, highly conductive Na DySi O pellet because it has low conductivity impurity phases. In this study, microwave heating for aqueous solution of starting materials was performed for the formation of homogeneous precursor of Na DySi O . A single-phase Na DySi O was successfully obtained from the aqueous solution heated with 2.45GHz microwave at 80 °C after calcination at 700 °C and sintering at 1050 °C. The Na DySi O showed high conductivity of 2.9 × 10 at 30 °C and an activation energy of 0.25 eV. The precursor particles with microwave heating were fine particles with a narrower particle size distribution than those without microwaving. The results of thermal analysis showed different thermal behaviors with and without microwaves. The crystalline phase after calcination at 700 °C was different with and without microwave. After sintering at 1050 °C with microwaves was a single-phase Na DySi O , but the pellets without the microwaves heating process did not have a crystalline phase of Na DySi O . These results demonstrated that microwave heating of aqueous solution affects the formation of single-phase Na DySi O . 5 4 12 5 4 12 5 4 12 5 4 12 5 4 12 5 4 12 5 4 12 5 4 12 −4

DOI： 10.1016/j.ssi.2021.115607

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記述言語：英語   掲載種別：研究論文（学術雑誌）

Hypotheses: The effective wetting area, a parameter somewhat different from the apparent contact area at solid–liquid interfaces, plays a significant role in surface wettability. However, determination of the effective wetting area for hydrophobic surfaces remains an open question. In the present study, we developed an electrochemical impedance method to evaluate the effective wetting area at a hydrophobic solid–liquid interface. Experiments: Patterned Si surfaces were prepared using the anisotropic wet etching method, and the water contact angle and electrochemical impedance were measured experimentally. The effective wetting area at the solid–liquid interface was examined based on the wettability and impedance results. Findings: The electrochemical impedance for the patterned Si surfaces increased with increasing surface hydrophobicity, whereas the effective wetting area decreased. The intermediate wetting state (i.e. partial wetting model) was confirmed at the patterned Si surfaces, and the effective wetting area was theoretically estimated. The effective wetting area predicted from the electrochemical impedance agreed well with that predicted from the partial wetting model, thereby demonstrating the validity of the electrochemical impedance method for evaluating the effective wetting area at the hydrophobic solid–liquid interface.

DOI： 10.1016/j.jcis.2021.01.056

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記述言語：英語   掲載種別：研究論文（学術雑誌）

An impedancemetric thick-film CO sensor using RE2CuO4 (RE = La, Sm, Eu, Gd) oxides was examined for monitoring carbon monoxide. The thick-film sensor using Eu2CuO4 showed a high response to CO. The response was almost linear to CO concentration between 50 and 600 ppm, and the 90% response time to 300-ppm CO was approximately 90 s, although the CO response of the sensor was affected by NO and NO2 at low concentration.

DOI： 10.1541/ieejsmas.141.37

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記述言語：英語   掲載種別：研究論文（学術雑誌）

Cobalt-nickel alloy thin-films were prepared by electrodepositing on Au-coated Al O substrate from aqueous solutions of metal-salts, and applied as a potentiometric hydrogen-phosphate ion sensor. A doping of 20 mol% nickel in cobalt contributed to enhancing hydrogen-phosphate ion sensing performances, i.e., the sensing range and response time were drastically improved. The Co Ni inf>thin-film electrode showed good potentiometric response to hydrogen-phosphate ion between 1.0 × 10 and 1.0 × 10 M with a slope of –59 mV/decade and high anion selectivity. The 90% response time to 1 mM H PO was as short as 15 s at pH 5.0, 30°C. A mixed potential sensing mechanism could be proposed on the basis of the results. 2 3 80 20 –5 –3 2 4 –

DOI： 10.2116/ANALSCI.20P290

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担当区分：責任著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

For oxygen reduction reaction of an air battery which uses oxygen and water as reactants, it is important to control not only gas diffusivity but also hydrophilicity. In this study, the effect of hydrophilicity was investigated quantitatively. Various hydrophilic reaction layers were prepared with different amounts of Nafion as hydrophilic binder. The hydrophilicity was evaluated by measuring water vapor adsorption and nitrogen adsorption isotherms and calculating specific surface area by Brunauer-Emmett-Teller (BET) method. Polarization curves of oxygen reduction reaction revealed that the hydrophilicity effect differs between the reaction ratedetermining range and the diffusion rate-determining range. In the reaction rate-determining range, the oxygen reduction current increased in proportion to the amount of water in the reaction layer, indicating the extension of the three-phase interface as the reaction field. In the diffusion rate-determining range, oxygen reduction current decreased with increasing the hydrophilicity, which demonstrates that high hydrophilicity suppressed oxygen diffusion.

DOI： 10.5796/electrochemistry.21-00094

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記述言語：英語   掲載種別：研究論文（学術雑誌）

A potentiometric solid-state sensor using a Na5DySi4O12 solid-electrolyte and oxide electrodes was tried to examine for monitoring HCl gas. Among the oxides tested, the sensor using RuO2 electrode showed relatively good HCl response at 400°C. The electromotive force was almost linear to the logarithm of HCl concentration between 100 and 1000 ppm. This HCl sensor showed also good selectivity to CO2, NO, and NO2, and few effect of oxygen. A mixed potential sensing mechanism is tentatively proposed.

DOI： 10.1541/ieejsmas.141.386

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記述言語：英語   掲載種別：研究論文（学術雑誌）

Lithium-ion solid electrolyte disc with high conductivity even at low temperature for electrochemical devices were designed using Li1+x+yAlxGayTi2-x-y(PO4)3 (x + y = 0–0.5) with NASICON-type structure. The solid-electrolyte discs were synthesized by a solution method at 900–1000 °C. Effects of Al and/or Ga dopants and crystal structures on ionic conductivity of the solid electrolytes were investigated. Almost single phase of Li1+x+yAlxGayTi2-x-y(PO4)3 (x + y = 0–0.5) systems could be synthesized at sintering temperatures above 900 °C up to x = 0.5, y = 0.25. An ionic conductivity as high as 9.3 × 10−4 S/cm at 30 °C and activation energy of 0.29 eV were obtained with the trivalent-cation double-doped Li1.5Al0.25Ga0.25Ti1.5(PO4)3 disc sintered at 900 °C.

DOI： 10.1016/j.ssi.2019.115212

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記述言語：英語   掲載種別：研究論文（学術雑誌）

<p>A solid-state micro NO_X sensor was tried to make using a solid-electrolyte Li_1.5Al_0.5Ti_1.5(PO₄)₃(LATP) thin-film as an impedance transducer and a perovskite-type oxide thin-film as a receptor, respectively. The LATP and perovskite-type La_0.8K_0.2MnO₃ oxide thin-films were prepared by wet-chemical methods at 650-800°C. The La_0.8K_0.2MnO₃/LATP thin-film device could work as a good impedancemetric NO₂ sensor at 300-500°C.</p>

DOI： 10.1541/ieejsmas.140.305

CiNii Article

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2019 by the authors. Licensee MDPI, Basel, Switzerland. A sensitive an impedancemetric acetylene (C 2 H 2 ) gas sensor device could be fabricated by using perovskite-type SmFeO 3 thin-film as a sensor material. The uniform SmFeO 3 thin-films were prepared by spin-coating and focusing on the effects of polymer precursor solutions. The prepared precursors and thin-films were characterized by means of thermal analysis, Fourier-transform infrared spectroscopy, ultraviolet–visible spectroscopy, X-ray diffraction analysis, scanning electron microscopy and X-ray photoelectron spectroscopy . It was found that particle growth and increase in homogeneity of the prepared thin-film could be accelerated by the addition of acetyl acetone (AcAc) as a coordination agent in the polymer precursor solution. Moreover, the highly crystallized thin-film-based sensor showed good response properties and stabilities to a low C 2 H 2 concentration between 0.5 and 2.0 ppm.

DOI： 10.3390/s19040773

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2019, Springer Science+Business Media, LLC, part of Springer Nature. Effects of the crystallographic structures of metal-phthalocyanines (metal: Co, Ni, Cu, Zn) between α and β phases on electrochemical oxygen reduction catalytic activities were investigated in acidic condition. As the distances of centered-metal in the structures of α and β phases are 3.8 Å and 4.8 Å, respectively, they were closed to the size of an oxygen molecule (3.6 Å). The phases of metal-phthalocyanines were conducted by an interface deposition method. The obtained catalyst powders were characterized by means of X-ray diffraction and X-ray photoelectron spectra analyses. Electrochemical oxygen reduction performances were mainly measured by using a gas diffusion type carbon electrode loaded with a metal-phthalocyanine. It was confirmed that the catalytic activities of cobalt- and copper-centered phthalocyanines were enhanced by the conversion from β to α phases. The effects of the distance between the metals in the crystallographic structures of metal-phthalocyanines should be explained by the adsorbed oxygen states that depend on the distance between the metals. The α phase has the distance which allows to form the bridge configuration of oxygen molecule which requires two adsorption sites and that eventually produces H2O by the direct 4-electron pathway. Analysis with the rotating disk electrode system showed that the α-phased metal-phthalocyanines enhance the 4-electron reduction pathway. [Figure not available: see fulltext.].

DOI： 10.1007/s12678-019-00553-2

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2019 The Ceramic Society of Japan Detection of nitrite-ion has become very important for various industrial fields due to its wide application range such as food additives and a rust preventive agent for steels. In this study, we attempted at developing an advanced method to produce layered perovskite-type cuprates based thick-film device for highly sensitive electrochemical sensor for nitrite-ion with a capacity of wide concentration range. Here, layered perovskite-type oxide powders could be synthesized by a polymer precursor method which was deposited on alumina supports with gold electrode by an electrophoretic deposition method. The sensor performance was measured by an amperometric method for nitrite-ion detection. It was found that the Gd2CuO4-based electrode showed fast and good linear responses to nitrite-ion for a wide range of concentration.

DOI： 10.2109/jcersj2.19078

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記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

©2018 The Ceramic Society of Japan. Pyrochlore-type A2B2O71z (A = Pb, Bi; B = Nb, Ru, Sn, Ir) oxide fine powders were synthesized by a wet-chemical method. The electrochemical reduction properties of carbon dioxide were investigated with carbon-based gas-diffusion-type electrodes loaded with various pyrochlore-type oxide catalysts. The currentvoltage curves under pure CO2 gas flow showed that the Sn-based pyrochlore-type oxides gave high electrocatalytic activities for the electrochemical CO2 reduction. Among the pyrochlore-type oxides tested, Bi2Sn2O7 showed the highest CO2 reduction reaction which gave CO as a main product at very high concentration. XPS analyses showed that the high performance for the electrochemical CO2 reduction of Bi2Sn2O7 was come from the valence state of Sn and/or oxygen adsorptiondesorption properties of the pyrochlore-type oxide.

DOI： 10.2109/jcersj2.18079

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2018 Elsevier B.V. A new type solid-electrolyte impedancemetric sensor using a zeolite as a receptor and a Li1.5Al0.5Ti1.5(PO4)3(LATP) disc as a transducer, respectively, was designed and its sensing properties were investigated for detection of NO and NO2in the range of 100–500 ppm at 300–500 °C. It was revealed that the impedance responses of the sensor device attached with a zeolite receptor changed with depending on NOxconcentration. Cation-exchange in zeolites gave good improvement of the sensor responses. Among the ion-exchanged zeolites, K+-doped Y-type zeolite-based sensor showed the highest sensitivity and selectivity to NO2.

DOI： 10.1016/j.snb.2018.02.146

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2018 Japan Society of Corrosion Engineering. All rights reserved. In this study, we focused on the combination of blast furnace slag mixed cement that imparts alkalinity, and nitrite that has proven in rust prevention treatment method of reinforced concrete. Also influence of these compositions on rust prevention of iron and verified the mechanism was dissassed. In order to observe the influence of alkaline powder and nitrite on iron, iron plates were immersed in aqueous solutions in which these additives were added as model samples. XPS analyses of the surface of iron plate immersed for 14 days, revealed that a large amount of adsorbed oxygen considered to nitrite ion was existed on the iron surface of the sample treated in containing nitrite. As for the energy state of iron, only the test piece containing nitrite ion showed lower peak, suggesting the adsorption of nitrite ion to the iron surface. In the actual steel sheet sample, an intermediate layer was composed of mainly iron and oxygen was confirmed at the interface between under coat containing nitrite and steel plate.

DOI： 10.3323/jcorr.67.78

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2017 Elsevier B.V. Carbon monoxide (CO) is a very toxic gas that is easily produced by incomplete combustion. In this study, a thick-film impedancemetric CO sensor with layered perovskite-type oxides (La 2-x A’ x Cu 1-y B’ y O 4 ; A’ = Sr, Ba, Ce; B’ = Zr, x, y = 0–0.2) was investigated. The oxides were synthesized by a polymer precursor method and used as receptor material for an impedancemetric CO sensor. Sensing properties of the thick-film devices prepared by a screen printing technique were investigated by the AC impedance method using an LCR meter at 300–600 °C. It was found that the La 1.9 Ce 0.1 CuO 4 thick-film device responded well to CO between 50 and 600 ppm at 400 °C, and 50 Hz.

DOI： 10.1016/j.snb.2017.04.059

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担当区分：筆頭著者   記述言語：英語   掲載種別：研究論文（学術雑誌）

Thin films of crack-free lithium ionic conductive Li1.5Al0.5Ti1.5 (PO4)3 (LATP) solid electrolyte could be fabricated by a modified Pechini-type polymeric precursor method with controlled amount of citric acid (CA), pH, and viscosity of precursor at low temperatures between 600 and 700 °C. It turned out that the increase in molar ratio of citric acid to total metal salts (M) in the precursor gave drastic change of thermal reactions and crack-free LATP thin films could be obtained from the precursor with CA/M = 5. In addition, the formation of LATP crystal phase required the viscosities more than 0.100 Pa s. It was also found that the pH control of the coating solutions was a key step to obtain homogeneous thin films. FT-IR measurements revealed that the change of pH in the precursors gave structural changes in precursor complexes. The LATP thin film of 200 nm in thickness prepared from the solution at CA/M = 5, 0.100 Pa s, and pH = ca. 10, sintered at 650 °C showed an ionic conductivity of ca. 0.029 S/cm at 300 °C. Graphical Abstract: [Figure not available: see fulltext.]

DOI： 10.1007/s10971-016-4043-y

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記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（学術雑誌）

© 2016 The Chemical Society of Japan. Metal phthalocyanines (MPcs; M = Co, Ni, Cu, Zn) with α-phase powders were obtained at the interface between hydrophilic and hydrophobic solutions starting from β-phase powders. This method was also applied to the deposition of a highly dispersed α-phase MPc on a carbon substrate, which showed high electrochemical activity for oxygen reduction.

DOI： 10.1246/cl.160486

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記述言語：英語   掲載種別：研究論文（学術雑誌）

© MYU K.K. Perovskite-type oxide SmBO 3 (B = Cr, Mn, Fe, Co) powders were prepared by a polymer precursor method at 750 °C and systematically investigated for electrochemical sensing properties for NO 2 - . The SmBO 3 -modified carbon-felt electrodes could be prepared by an electrophoretic deposition (EPD) method without sintering. Among the oxide deposited electrodes, the SmFeO 3 modiied electrode showed the highest sensitivity to NO 2 - with 11.9 mA M -1 cm -2 and a linear sensing range between 5.0 × 10 -5 and 1.0 × 10 -3 M at +0.85 V vs Ag / AgCl with high selectivity for NO 2 - and no response to most other anions. A good correlation was observed between electrochemical activity toward nitrite-ion oxidation and oxygen adsorption properties of the oxides.

DOI： 10.18494/SAM.2016.1237

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記述言語：日本語   掲載種別：記事・総説・解説・論説等（その他）

DOI： 10.5796/electrochemistry.84.188

CiNii Article

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記述言語：英語   掲載種別：研究論文（学術雑誌）

Perovskite-type SmFeO 3 fine powder was synthesized by the polymer precursor method using carbonate powder as an anti-sintering agent. SmFeO 3 particles synthesized at 550°C were smaller than 100nm and had a specific surface are of 36 m 2 /g. Also, the addition of carbonate in the calcinations process enabled the synthesis temperature for crystal formation of SmFeO 3 to be reduced by 100°C. Results of thermal analysis suggested that carbonate stimulates a combustion reaction required for the formation of SmFeO 3 . © 2013 The Ceramic Society of Japan. All rights reserved.

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記述言語：英語   掲載種別：研究論文（学術雑誌）

DOI： 10.1016/j.snb.2012.09.086

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記述言語：英語   掲載種別：研究論文（学術雑誌）

DOI： 10.1016/j.snb.2012.09.066

Scopus

記述言語：英語   掲載種別：研究論文（学術雑誌）

Solid-state impedancemetric NO x sensor devices composed of the perovskite-type oxide (La 0.8 A 0.2 MnO 3 ; A = La, Na, K) as a receptor material and a Li 1.5 Al 0.5 Ti 1.5 (PO 4 ) 3 (LATP) disc as a solid-electrolyte transducer were investigated for the detection of NO x (NO and NO 2 ) in the range of 100-500 ppm at 400°C. The lanthanum manganite/LATP-based sensor devices showed NO x sensing responses that could be divided into two components of resistance and capacitance. While the sensitivities to NO x were largely affected by the type of receptor material used, the La 0.8 K 0.2 MnO 3 /LATP-based impedancemetric sensor element showed excellent NO sensing properties. FT-IR measurements revealed that the interaction between NO and La 0.8 K 0 2 MnO 3 was the strongest among the receptor materials.

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84874820555&origin=inward

記述言語：英語   掲載種別：研究論文（学術雑誌）

DOI： 10.1166/jnn.2012.4628

Scopus

記述言語：英語   掲載種別：研究論文（学術雑誌）

DOI： 10.4028/www.scientific.net/KEM.507.215

Scopus

記述言語：英語   掲載種別：研究論文（学術雑誌）

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84858965123&origin=inward

記述言語：英語   掲載種別：研究論文（学術雑誌）

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）

Perovskite-type SmFeO 3 thin-film devices could be synthesized by a polymer precursor method and the impedancemetric sensing properties for acetylene gas were investigated. For preparation of the oxide, ethylene glycol solvent dissolving metal nitrates with polyvinylpyrrolidone and acetylacetone, as a polymer additive and a coordination agent, respectively, was spin-coated on an alumina substrate with Au interdigitated electrodes, and finally sintered at 600∼750 °C. The SmFeO 3 thin-film thus prepared showed well crystallized and almost single perovskite-type phase with the thickness of ca. 200 nm. The SmFeO 3 oxide thin-film sensors showed change in AC impedance at 20 kHz depending on acetylene gas concentrations at 400 °C. Copyright © 2011 American Scientific Publishers.

DOI： 10.1166/sl.2011.1417

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=83255181470&origin=inward

記述言語：英語   掲載種別：研究論文（学術雑誌）

CiNii Article

記述言語：英語   掲載種別：研究論文（学術雑誌）

Metal-sulfides with high chemical stability in acidic condition were tried to develop as an alternative none-noble metal electrocatalyst for polymer electrolyte fuel cell (PEFC). In particular, various types of Ni-based sulfides have synthesized by wet-chemical method and analyzed for the cathodic performances. Among the NiS, NiS2, and NI3S4, nickel-mono sulfide (NiS) system showed high oxygen reduction performance in 2N-H2SO4 at 70°C. In addition, Ni0.9Cu 0.1S was found to show the highest oxygen reduction performance in the Ni-mono sulfide based catalysts.

DOI： 10.5796/electrochemistry.79.364

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=79960239580&origin=inward

記述言語：英語   掲載種別：研究論文（学術雑誌）

Perovskite-type structured LaCoO 3 fine powder with high surface areas could be prepared by a polymer precursor method using acetylacetone (AcAc) as a chelating agent at 500°C. This fine powder could be used for an electrophoretic deposition (EPD) process in an acetylacetone-based suspension. The LaCoO 3 fine powder supported on carbon-cross device was prepared by the EPD method without a sintering process. The device showed good properties of amperometric sensing of hydrogen-phosphate ion.

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77950365634&origin=inward

開催期間： 2023年03月27日 - 2023年03月29日   記述言語：日本語   開催地：宮城県仙台市   国名：日本国  

開催期間： 2022年11月25日   記述言語：日本語   開催地：オンライン   国名：日本国  

開催期間： 2022年11月25日   記述言語：日本語   開催地：オンライン   国名：日本国  

開催期間： 2022年11月08日 - 2022年11月10日   記述言語：日本語   開催地：福岡市   国名：日本国  

開催期間： 2022年09月08日 - 2022年09月09日   記述言語：日本語   開催地：神奈川県横浜市   国名：日本国  

開催期間： 2022年09月08日 - 2022年09月09日   記述言語：日本語   開催地：神奈川県横浜市   国名：日本国  

開催期間： 2022年09月08日 - 2022年09月09日   記述言語：日本語   開催地：神奈川県横浜市   国名：日本国  

開催期間： 2022年07月01日   記述言語：日本語   開催地：北九州市   国名：日本国  

開催期間： 2022年07月01日   記述言語：日本語   開催地：北九州市   国名：日本国  

開催期間： 2022年07月01日   記述言語：日本語   開催地：北九州市   国名：日本国  

開催期間： 2022年03月15日 - 2022年03月17日   記述言語：日本語   開催地：オンライン   国名：日本国  

マンガンナノシートと異種金属を組み合わせた安定な複合材料を得るために湿式法の条件を検討し、溶液の電導度による複合化状態の把握と複合化状態の安定化に対するマイクロ波加熱の効果、および得られた種々の金属との複合化触媒の酸素還元触媒特性を報告した。

その他リンク： https://confit.atlas.jp/guide/event/ecsj2022s/subject/1G06/advanced

開催期間： 2022年03月15日 - 2022年03月17日   記述言語：日本語   開催地：オンライン   国名：日本国  

ルテニウムを含むパイロクロア型酸化物の水電解触媒活性を向上させるために金属の一部置換効果を検討した結果を報告した。

その他リンク： https://confit.atlas.jp/guide/event/ecsj2022s/session/3K05-08/class

開催期間： 2022年03月15日 - 2022年03月17日   記述言語：日本語   開催地：オンライン   国名：日本国  

金属フタロシアニンの金属複合化及び電荷移動錯体形成を試み、得られた結晶を水電解触媒として評価した。マンガン系複合結晶で高い触媒活性が得られたことを報告した。

その他リンク： https://confit.atlas.jp/guide/event/ecsj2022s/session/3K05-08/class

開催期間： 2022年01月08日 - 2022年01月09日   記述言語：日本語   国名：日本国  

二酸化炭素の資源化に必要な還元触媒としてスズと亜鉛を含む逆スピネル酸化物を評価し、コバルトまたは銅で一部置換を行うことで、還元生成物の一酸化炭素選択性が向上したことを報告した。

その他リンク： http://kiso60.umin.jp/program.html

開催期間： 2022年01月08日 - 2022年01月09日   記述言語：日本語   国名：日本国  

新規なリチウムイオン導電体を開発することを目的として亜鉛を含むリチウム塩の一部置換効果を検討したことを報告した。

その他リンク： http://kiso60.umin.jp/program.html

開催期間： 2021年11月30日 - 2021年12月02日   記述言語：日本語   開催地：パシフィコ横浜ノース   国名：日本国  

タングステンまたはモリブデンを含有する複合金属炭化物の合成と空気電池の2次電池化に必要な二元機能酸素電極触媒として評価した結果を発表した。モリブデンとコバルトの複合炭化物が高活性を示すことを報告した。

開催期間： 2021年11月30日 - 2021年12月02日   記述言語：日本語   開催地：パシフィコ横浜ノース   国名：日本国  

　固体高分子形燃料電池用酸素還元触媒として、金属フタロシアニンの結晶を検討した。新規に開発した湿式合成法により様々な複合金属フタロシアニン結晶の合成に成功し、複合系の触媒が高い酸素還元触媒活性を示すことを報告した。

開催期間： 2021年11月13日   記述言語：日本語   開催地：オンライン   国名：日本国  

マンガン酸化物ナノシートと金属イオンの複合化を検討し、空気電池用空気極触媒として評価し、イットリウム複合系が高活性を示したことを報告した。

開催期間： 2021年11月13日   記述言語：日本語   開催地：オンライン   国名：日本国  

複合金属触媒の炭酸ガス還元に対する触媒活性を向上させる検討した結果を発表した

開催期間： 2021年11月13日   記述言語：日本語   開催地：オンライン   国名：日本国  

新規なリチウムイオン導電体の合成法と特性について報告した

開催期間： 2019年11月13日 - 2019年11月15日   記述言語：日本語   開催地：国立京都国際会館  

　固体高分子形燃料電池用酸素還元触媒として、金属フタロシアニン(MPc)系触媒を検討した。MPcの触媒特性は、活性点である中心金属種と中心金属間距離に依存して異なる1)。本研究では、中心金属種の複合化の影響を検討するために、MPcの有機系溶液を水溶液に滴下する湿式法により、MPcの複合積層体を作製し、酸素還元触媒特性を分極測定により評価を行った。

開催期間： 2019年09月05日 - 2019年09月06日   記述言語：日本語   開催地：山梨大学  

　COは鉄鋼業などで還元剤として利用可能であるため、CO2のCOへの還元はCO2を資源化する方法として検討されている。本研究では、CO2還元触媒活性を持つ遷移金属フタロシアニン(MPc)に着目し、CO2還元触媒特性向上を目的として、MPcが自己形成する積層体を種々の中心金属を持つMPcを用いて金属複合化MPc触媒の作製とCO2還元特性の評価を行った。

開催期間： 2018年12月15日 - 2018年12月16日   記述言語：英語   開催地：Kyushu Institute of Technology  

Practical proton conductive polymer electrolyte membrane fuel cells (PEMFC) require a highly active electrocatalyst for oxygen reduction reaction (ORR). We tried to align the MPc molecules through a selection of the crystallographic structures in MPc with a deposition at a hydrophilic-hydrophobic interface. In the two major crystallographic structures for MPcs, α phase (α-MPc) and β phase (β-MPc), MPc molecules are orderly arranged in parallel at a distance of 3.4 Å. The distances for central metals are 3.8Å in α-MPc and 4.8Å in β-MPc due to parallel shifts of the molecular plane.
The catalytic performance of various α-MPc compared with β-MPc in an acid medium, and the influence of the crystallographic structures on the ORR properties is discussed.

開催期間： 2018年06月30日   記述言語：日本語   開催地： 北九州国際会議場  

開催期間： 2017年01月12日 - 2017年01月13日   記述言語：日本語  

開催期間： 2016年11月29日 - 2016年12月01日   記述言語：日本語   開催地：幕張メッセ 国際会議場  

開催期間： 2016年11月04日   記述言語：日本語  

開催期間： 2016年09月07日 - 2016年09月09日   記述言語：日本語  

開催期間： 2016年08月21日 - 2016年08月26日   記述言語：英語  

開催期間： 2016年07月10日 - 2016年07月13日   記述言語：英語  

開催期間： 2016年07月02日   記述言語：日本語  

開催期間： 2016年07月02日   記述言語：日本語  

開催期間： 2016年07月02日   記述言語：日本語   開催地：北九州国際会議場  

開催期間： 2015年03月15日 - 2015年03月17日   記述言語：日本語   開催地：横浜国立大学  

開催期間： 2015年03月15日 - 2015年03月17日   記述言語：日本語   開催地：横浜国立大学  

開催期間： 2015年01月08日 - 2015年01月09日   記述言語：日本語   開催地：京都テルサ  

開催期間： 2015年01月08日 - 2015年01月09日   記述言語：日本語   開催地：京都テルサ  

開催期間： 2015年01月08日 - 2015年01月09日   記述言語：日本語   開催地：京都テルサ  

開催期間： 2014年11月07日   記述言語：日本語   開催地：ウェルとばた  

開催期間： 2014年11月07日   記述言語：日本語   開催地：ウェルとばた  

開催期間： 2014年09月27日 - 2014年09月28日   記述言語：日本語   開催地：北海道大学  

開催期間： 2014年09月27日 - 2014年09月28日   記述言語：日本語   開催地：北海道大学  

開催期間： 2014年09月27日 - 2014年09月28日   記述言語：日本語   開催地：北海道大学  

開催期間： 2014年09月09日 - 2014年09月11日   記述言語：日本語   開催地：鹿児島大学  

開催期間： 2014年06月28日   記述言語：日本語  

開催期間： 2014年06月28日   記述言語：日本語  

開催期間： 2014年06月28日   記述言語：日本語  

開催期間： 2014年01月09日 - 2014年01月10日   記述言語：日本語   開催地：名古屋　ウインクあいち  

開催期間： 2014年01月09日 - 2014年01月10日   記述言語：日本語   開催地：名古屋　ウインクあいち  

開催期間： 2013年11月20日 - 2013年11月23日   記述言語：英語  

開催期間： 2013年09月27日 - 2013年09月28日   記述言語：日本語  

開催期間： 2007年11月13日 - 2007年11月15日   記述言語：日本語   開催地： 福岡市  

科目区分：学部専門科目

1年生の自由研究に対して研究の進行と発表準備に対して助言を行った。

対象： 高校生

種別：セミナー・ワークショップ

実戦事業に参加している名古屋の高校生に水電解と触媒に関する講義を行い、水電解用触媒の評価実験を体験させた

対象： 高校生,　社会人・一般

種別：セミナー・ワークショップ

男女の別なく幅広い対象者に工学を広める目的で工学系研究者と大学院生の講演を行うシンポジウムを企画し、開催した。高校生や、保護者、一般の方々に分かり易い講演であったと好評をいただいたこと、大学院生のスキルアップに効果が高かった。

対象： 高校生

種別：セミナー・ワークショップ

各地で勉強しながら燃料電池自動車を作製するプロジェクトに参加する高校生に対して電池の触媒の必要性と作用機構に関する講義を行った。

種別：セミナー・ワークショップ

九州工業大学と女性研究者ネットワーク（ダブルキュービック）の共同主催による「第２回　女性研究者シンポジウム」で講演を行った。

対象： 高校生

種別：出前授業

名古屋市科学館主催の高校生燃料電池プロジェクトの一環として、高校生へ燃料電池触媒に関する特別授業を行った。