Faculty Profiles - HARUYAMA Tetsuya

Papers - HARUYAMA Tetsuya

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Elucidation of the behavior of oxygen remaining in water molecules after hydrogen atom abstraction in the plasma/liquid (P/L) interfacial reaction: improvement in the selectivity of ammonia synthesis and parallel production of hydrogen gas Reviewed

Yoshida S., Murakami N., Takatsuji Y., Haruyama T.

Green Chemistry 25 ( 2 ) 579 - 588 2023.02

Drastically Increase in Atomic Nitrogen Production Depending on the Dielectric Constant of Beads Filled in the Discharge Space. Reviewed International journal

Yuto Tsuchida, Naoya Murakami, Tatsuya Sakakura, Yoshiyuki Takatsuji, Tetsuya Haruyama

ACS Omega ( American Chemical Society ) 6 29759 - 29764 2021.10

Excitation of H2O at the plasma/water interface by UV irradiation for the elevation of ammonia production Reviewed

Sakakura T., Uemura S., Hino M., Kiyomatsu S., Takatsuji Y., Yamasaki R., Morimoto M., Haruyama T.

Green Chemistry 20 ( 3 ) 627 - 633 2018.01

Electrodeposited Cu-Sn Alloy for Electrochemical CO2 Reduction to CO/HCOO− Reviewed International journal

Masayuki Morimoto, Yoshiyuki Takatsuji, Ryota Yamasaki, Hikaru Hashimoto, Ikumi Nakata, Tatsuya Sakakura, Tetsuya Haruyama

Electrocatalysis ( Springer-Nature ) 9 323 - 332 2017.11

Non-catalyzed One-step Synthesis of Ammonia from Atmospheric Air and Water Reviewed International journal

18 4536 - 4541 2016.07

Promoting Degradation of Polyamide-Microplastic Fibers Using Hydroxy Radical Generated by Electrochemical Advanced Oxidation Processes Reviewed

Meboso T., Takatsuji Y., Takamura E., Haruyama T., Sakamoto H.

Journal of the Electrochemical Society 170 ( 12 ) 2023.12

Photoelectrochemical C-H activation of methane to methyl radical at room temperature Reviewed International journal

Amano F., Shintani A., Sakakura T., Takatsuji Y., Haruyama T.

Catalysis Science and Technology 2023.01

Prospects for Catalytic Electrodes That Convert Carbon Dioxide into Resources Invited Reviewed

Yoshiyuki TAKATSUJI, Tetsuya HARUYAMA

59 ( 3 ) 86 - 89 2022.06

Anodized Zn electrode for formate selectivity during the electrochemical reduction of CO<inf>2</inf> at low applied potential Reviewed International journal

Takatsuji Y., Morimoto M., Nakatsuru Y., Haruyama T.

Electrochemistry Communications 138 2022.05

Anodized Zn electrode for formate selectivity during the electrochemical reduction of CO2 at low applied potential. Reviewed International journal

138 107281 - 107286 2022.04

Quick and environmentally friendly sterilization process of dental instruments by radical vapor reactor. Reviewed International journal

Kaede Okita, Ryota Yamasaki, Yohei Nakamura, Tatsuya Sakakura, Aki Kawano, Yoshiyuki Takatsuji, Tetsuya Haruyama, Yoshie Yoshioka, Wataru Ariyoshi

Process Biochemistry 113 22 - 26 2022.02

Decreasing the Overpotential for Formate Production in Electrochemical CO2 Reduction Achieved by Anodized Sn Electrode. Reviewed International journal

Masayuki Morimoto, Namiki Fujita, Yoshiyuki Takatsuji, Tetsuya Haruyama

Electrocatalysis 13 72 - 80 2022.01

Decreasing the Overpotential for Formate Production in Electrochemical CO<inf>2</inf> Reduction Achieved by Anodized Sn Electrode Reviewed International journal

Morimoto M., Fujita N., Takatsuji Y., Haruyama T.

Electrocatalysis 13 ( 1 ) 72 - 80 2022.01

Reactive Oxygen Species Penetrate Persister Cell Membranes of Escherichia coli for Effective Cell Killing Reviewed

Kawano A., Yamasaki R., Sakakura T., Takatsuji Y., Haruyama T., Yoshioka Y., Ariyoshi W.

Frontiers in Cellular and Infection Microbiology 10 2020.09

Nitrogen Fixation in a Plasma/Liquid Interfacial Reaction and Its Switching between Reduction and Oxidation Reviewed

Sakakura T., Murakami N., Takatsuji Y., Haruyama T.

Journal of Physical Chemistry C 124 ( 17 ) 9401 - 9408 2020.04

Photoelectrochemical reduction of CO<inf>2</inf> using a TiO<inf>2</inf> photoanode and a gas diffusion electrode modified with a metal phthalocyanine catalyst Reviewed

Kobayashi K., Lou S.N., Takatsuji Y., Haruyama T., Shimizu Y., Ohno T.

Electrochimica Acta 338 2020.04

Language：English Publishing type：Research paper (scientific journal)

The mass transport limitations encountered in classical H-cells for electrochemical CO2 reduction reaction (CO2RR) have spurred research in gas diffusion electrode (GDE) systems. However, current reports on CO2RR required large biases (anode potential vs. cathode potential > -2.0 V) for high current efficiencies. In this work, we combined a TiO2 photoanode and a GDE modified with a Co, Ni or Sn metal phthalocyanine (MPc) catalyst to reduce the external bias requirement for CO2RR. We found the Faradaic efficiencies and the selectivity of the photoelectrolysis products were influenced by (i) the metal cation (Ni, Co or Sn) coordinated to the phthalocyanine, (ii) the electrolyte temperature and concentration and (iii) the magnitude of the applied bias. In addition, analyzes of the voltage distributions between the TiO2 photoanode and the MPc-GDE revealed the current efficiency of the TiO2/MPc-GDE cell was limited predominantly by a high ohmic polarization loss at the TiO2 photoanode due to an excessive thickness of the TiO2 layer. The cathodic process at the MPc-GDE was governed by the activation energy of the electrode. The thickness of the TiO2 photoanode was subsequently optimized for higher current efficiency. The highest Faradaic efficiency for PEC CO2RR was obtained when a NiPc catalyst was utilized as the CO2RR catalyst and the optimum cell conditions were as follows: (i) a GDE electrolyte temperature of <11 °C, (ii) a GDE electrolyte concentration of >1 M aq. Na2SO4 electrolyte solution and (iii) a TiO2 oxidation time of 3 h. Using these optimized cell conditions and under UV illumination, the as-prepared TiO2/NiPc-GDE cell shows a notably high CO2RR Faradaic efficiency and selectivity for CO (at 98%) and at a lowest reported cell bias of 0.8 V (anode potential vs cathode potential). This work provides an improved understanding of the cell designs of a vapor-fed CO2RR reactor based on a TiO2/MPc-GDE photoelectrochemical system.

DOI： 10.1016/j.electacta.2020.135805

Scopus

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Nitrogen fixation through the plasma/liquid interfacial reaction with controlled conditions of each phase as the reaction locus Reviewed

Sakakura T., Takatsuji Y., Morimoto M., Haruyama T.

Electrochemistry ( The Electrochemical Society of Japan ) 88 ( 3 ) 190 - 194 2020.01

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

<p>In the plasma/liquid (P/L) interfacial reaction, nitrogen fixation is performed on a water phase surface. In the P/L reaction, discharged nitrogen gas reacts with water molecules at the interface between the plasma gas phase and the water phase, followed by either a reduction reaction, ammonia production or oxidation reaction, nitric acid production. The production of nitric acid in the P/L reaction is influenced by the concentration of oxygen present in each gas phase and water phase, and the atomic nitrogen contained in the nitrogen plasma. For the reduction reaction at the P/L reaction locus, the water phase was modulated in order to make ammonia production dominant in nitrogen fixation. Ammonia is released into the gas phase under conditions of high water temperature and high pH. To obtain only ammonia using this reaction, it is necessary to incorporate a process for raising the temperature of the water. In the P/L reaction, only the ammonia gas can be obtained in one-step by using the rise in water temperature due to the discharged heat plasma gas. A reaction system was developed to control the water and the gas phase to enable high purity ammonia trapping as released by the gas phase.</p>

DOI： 10.5796/electrochemistry.19-00080

Scopus

CiNii Article

CiNii Research

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水を直接の水素源として窒素還元を行う「相界面反応」によるアンモニア合成 Invited

酒倉辰弥、高辻義行、春山哲也

化学工業 70 ( 11 ) 805 - 809 2019.11

Contribution of discharge excited atomic N, N2*, and N2+ to a plasma/liquid interfacial reaction as suggested by quantitative analysis. Reviewed

Sakakura T., Murakami N., Takatsuji Y., Morimoto M., Haruyama T.

ChemPhysChem 20 ( 11 ) 1467 - 1474 2019.09

Highly Selective Methane Production Through Electrochemical CO<inf>2</inf> reduction by Electrolytically Plated Cu-Co Electrode Reviewed

Takatsuji Y., Nakata I., Morimoto M., Sakakura T., Yamasaki R., Haruyama T.

Electrocatalysis 10 ( 1 ) 29 - 34 2019.01

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Papers - HARUYAMA Tetsuya