研究者詳細 - 清水　陽一

論文 - 清水　陽一

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Elucidation of the electrocatalytic function of composite metal carbides Co3W3C and Co3Mo3C with oxygen reduction and oxygen evolution reactions 査読有り国際誌

Shotaro Nomoto, Hiroki Kitamura, Satoko Takase, Youichi Shimizu

Electrochemistry ( 電気化学会 ) 93 2025.01.02 accepted for publication 2025年01月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Metal-air secondary batteries have attracted attention as a next-generation energy storage system due to their high energy density and environmentally friendly characteristics. However, it is important to develop a catalyst that can rapidly promote both the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). We have found that Co3W3C and Co3Mo3C composite metal carbides prepared by a wet method have high bifunctional electrode performance, but the mechanism of action has not been elucidated. In this study, we comprehensively evaluated the adsorption behavior of oxygen molecules and surface hydroxyl groups, the charge density difference, and the effects of surface structure and chemical composition on catalytic activity by combining DFT (density functional theory) calculations and instrumental analysis. In particular, we found that Co3Mo3C optimizes the adsorption of oxygen molecules by metal compositing, contributing to the improvement of electrode catalytic performance.

DOI： 10.5796/electrochemistry.24-00123

その他リンク： https://www.jstage.jst.go.jp/article/electrochemistry/advpub/0/advpub_24-00123/_article/-char/ja

Preparation of Conductive Bimetallic Phthalocyanine with Acceptor and Their Electrocatalytic Properties for CO2 Reduction 査読有り国際誌

Satoko Takase, Taku Aritsu, Yuki Kamikawa, Toshiyuki Takizawa, Youichi Shimizu

Bulletin of the Chemical Society of Japan ( 日本化学会 ) 97 ( 11 ) uoae116 Received Date: 22-Oct-2024 2024年11月

Wet-Chemical Synthesis of Co3Mo3C -Based Electrocatalysts for Oxygen Reduction and Evolution Reactions 査読有り国際誌

Ikki Yanagimoto, Masashi Wada, Satoko Takase, Youichi Shimizu

Chemistry Letters ( 日本化学会 ) 53 upae197 Advance access publication 29 October 2024 2024年10月

All Ceramic Ion Sensor Using Dielectric BaTiO3 Transducer 査読有り国際誌

Soichiro Suzuki, Satoko Takase, Youichi Shimizu

IEEJ Transactions on Electrical and Electronic Engineering ( The Institute of Electrical Engineers of Japan ) 19 ( 6 ) 1097 - 1099 2024.2.20受理 2024年06月

Sm系ペロブスカイト型酸化物厚膜電極を用いた電気化学式イオンセンサ

堤　郁弥、高瀬聡子、瀧澤俊幸、清水陽一

Chemical Sensors 40 ( Sup. A ) 22 - 24 2024年03月

ペロブスカイト型ハロゲン化物を用いたガスセンサの設計

高石剛志、高瀬聡子、瀧澤俊幸、清水陽一

Chemical Sensors 40 ( Sup. A ) 64 - 66 2024年03月

Synergistic Effect of Phthalocyanine and Pyrochlore-type Oxide Catalysts to Enhance Activity of Electrochemical Carbon Dioxide Reduction 査読有り国際誌

Ren Maruyama, Satoko Takase, Youichi Shimizu

Chemistry Letters ( 日本化学会 ) 53 ( 3 ) upae029 2024年01月

Receptor Functions of Metal-Carbonates for Solid-Electrolyte Impedancemetric Gas Sensor 査読有り国際誌

Yusuke Baba, Yuhei Hasegawa, Satoko Takase, Youichi Shimizu

IEEJ Transactions on Electrical and Electronic Engineering ( The Institute of Electrical Engineers of Japan ) 18 ( 12 ) 1964 - 1966 First Published on line: 16 September 2023 2023年09月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Receptor functions of metal-carbonates for solid-electrolyte impedancemetric gas sensor based on Li-ionic conductor (Li1.5Al0.5Ti1.5[PO4]3) were studied. It was revealed that sensors attached with metal-carbonate receptors rarely responded to CO2, on the contrary, they well responded to NOx. In addition, it was found that the responses to NOx differed depending on the metal-carbonates. The sensor using the binary carbonate (Li2CO3 + CaCO3) receptor showed high NO2 sensitivity and different NO responses at 300 °C, 50 Hz, i.e., other devices responded to NO2 and NO with same direction, while the binary carbonates (Li2CO3 + CaCO3) system responded to NO2 and NO in the opposite direction, which should give selective detection among NO and NO2. © 2023 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

DOI： 10.1002/tee.23916

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85171257629&origin=inward

イオン交換ゼオライトをレセプタ―とする固体電解質ガスセンサ

永迫心、高瀬聡子、清水陽一

Chemical Sensors 39 ( Sup. B ) 1 - 3 2023年09月

Preparation of Highly Conductive Phthalocyaninato-cobalt Iodide at the Interface between Aqueous KI Solution and Organic Solvent and Catalytic Properties for Electrochemical Reduction of CO2 査読有り国際誌

Satoko Takase, Taku Aritsu, Yoichiro Sakamoto, Yoshihiro Sakuno, Youichi Shimizu

Bulletin of the Chemical Society of Japan ( 日本化学会 ) 96 ( 7 ) 649 - 653 Web Released: July 12, 2023 2023年07月

Enhancement of formic acid formation by nitrogen-doped graphene oxide nanosheets decorated with Sn nanoparticles in electrochemical CO2 reduction 査読有り国際誌

YumaTano, Muhammad Sohail Ahmadabebe, Yuya Watase, Tatsuki Tsugawa, Satoko Takase, Yusuke Inomata, Kazuto Hatakeyama, Shintaro Ida, Quitain Armando, Youichi Shimizu, Tetsuya Kida

Sustainable Energy & Fuels ( 英国化学会 ) 7 ( 16 ) 3964 - 3971 Accepted 8July2023 2023年07月

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

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85166223940&origin=inward

化学センサ４０年と次世代への期待招待有り

清水陽一

Chemical Sensors ( 公益社団法人　電気化学会化学センサ研究会 ) 39 ( 1 ) 1 - 1 2023年03月

ゼオライトを用いた固体電解質インピーダンス型ガスセンサ

永迫心、高瀬聡子、清水陽一

Chemical Sensors ( 化学センサ研究会 ) 39 ( Sup. A ) 40 - 42 2023年03月

Sensing Properties of Solid Electrolyte NOx Sensor Using NASICON and Perovskite-Type Oxide Electrode 査読有り国際誌

Hiromi Takahashi, Satoko Takase, Youichi Shimizu

IEEJ Transactions on Electrical and Electronic Engineering ( The Institute of Electrical Engineers of Japan ) 18 ( 6 ) 989 - 991 First published: 07 March 2023 2023年03月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

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

Scopus

その他リンク： https://onlinelibrary.wiley.com/doi/10.1002/tee.23792

Electrochemical Sulfite-Ion Sensor Using Sm2CuO4-Based Layered Perovskite-Type Oxide Thick film 査読有り国際誌

Yasunari Shinoda, Satoko Takase, Youichi Shimizu

IEEJ Transactions on Electrical and Electronic Engineering ( The Institute of Electrical Engineers of Japan ) 18 ( 2 ) 300 - 302 2023年02月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

Sm2−xCexBO4 (x = 0, 0.1; B = Fe, Cu) thick films were prepared by an electrophoretic deposition method and applied as sulfite-ion (SO32−) sensors. Among the oxides, Sm1.9Ce0.1CuO4 showed good amperometric response to sulfite ions in the ion concentration range between 1.0 × 10−5 and 1.0 × 10−4 M at 30 °C. The applied potential to the electrode should be one of the key factors of high selectivity, and the relatively low potential of +0.2 V versus Ag/AgCl was found to be optimal for the detection of sulfite ions. Good sulfite-ion sensing should be enabled by Cu+ in Sm1.9Ce0.1CuO4 where SO32− is easily adsorbed. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

DOI： 10.1002/tee.23724

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85139636770&origin=inward

Bi-functional Oxygen Electrocatalysts Using Mixed-Metal Tungsten-Nitrides in Alkaline Media 査読有り国際誌

Shotaro Nomoto, Hiroki Kitamura, Satoko Takase, Youichi Shimizu

Electrochemistry ( 電気化学会 ) 90 ( 8 ) 087005 - 087005 2022.06.21 accepted for publication 2022年06月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

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 C FeWN2C CrWN2. While the oxygen evolution was in that of Co3W3N C CrWN2> Ni2W3N > MnWN2C FeWN2. Then, the Co3W3N gave high bi-functional oxygen electrocatalytic properties. Furthermore, Ni-doped (Co1-xNix)3W3N (x = 0-1.0) were prepared and it was found that the (Co0.6Ni0.4)3W3N gave the highest bi-functional electrocatalytic properties. The cathode performance was achieved with the electrode containing 32 wt% (Co0.6Ni0.4)3W3N, i.e., the current density as high as 280mAcm-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 (Co0.6Ni0.4)3W3N electrode showed high activity to oxygen evolution as high as 300mAcm-2 at (1.60 V vs. RHE). As it was observed the changes in binding energy at O1s, N1s, W4f, Co2p, and Ni2pspectra among Co3W3N, (Co0.6Ni0.4)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.

DOI： 10.5796/electrochemistry.22-00056

Scopus

CiNii Research

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85136467268&origin=inward

随想ーランキングと研究ー招待有り

清水陽一

セラミックス ( 日本セラミックス協会 ) 57 ( 2 ) 55 - 55 2022年02月

Effect of Metal-Nitrate Receptor on Solid-Electrolyte Impedancemetric NOxSensor Performance 査読有り国際誌

Nobuaki Kijima, Satoko Takase, Youichi Shimizu

IEEJ Transactions on Sensors and Micromachines ( 電気学会 ) 142 ( 1 ) 13 - 14 2022年01月

担当区分：最終著者,　責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

The effects of metal-nitrate receptors on the NOX sensing properties of an impedancemetric solid-state sensor were investigated using a solid Li1.5Al0.5Ti1.5(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.

DOI： 10.1541/ieejsmas.142.13

Scopus

CiNii Article

CiNii Research

その他リンク： https://www.jstage.jst.go.jp/article/ieejsmas/142/1/142_13/_pdf

Electrochemical Nitrate-Ion Sensor Based on CuCo2O4Spinel-Type Oxide Thick-Film 査読有り国際誌

Keitaro Tsuji, Satoko Takase, Youichi Shimizu

IEEJ Transactions on Sensors and Micromachines ( 電気学会 ) 142 ( 11 ) 308 - 309 2022年01月

担当区分：最終著者,　責任著者記述言語：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

Scopus

CiNii Research

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85144194357&origin=inward

Investigation of the Effect of Hydrophilicity on Oxygen Reduction Reaction Property with Measurement of Water Vapor Specific Surface Area 査読有り国際誌

Satoko Takase, Ayumi Kimoto, Masaki Kusunoki, Youichi Shimizu

Electrochemistry ( 電気化学会 ) 89 ( 6 ) 597 - 601 2021.9.3 accepted for publication 2021年11月

担当区分：最終著者,　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

Scopus

CiNii Article

CiNii Research

その他リンク： https://www.jstage.jst.go.jp/article/electrochemistry/advpub/0/advpub_21-00094/_article/-char/ja

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