Updated on 2026/04/09

写真a

 
OKADA Hiroyuki
 
Organization
Graduate School of Engineering Materials Chemistry 1 Assistant Professor
Undergraduate School
School of Engineering Chemistry and Biotechnology
Title
Assistant Professor
Contact information
メールアドレス
Homepage
https://www.chembio.nagoya-u.ac.jp/labhp/physchem3/index_eng.html
External link

Research Interests 6

  1. 電気化学

  2. 電極触媒

  3. 酸素発生反応

  4. 超薄膜

  5. 触媒化学

  6. 水電解

To the head of Research Interests.▲

Research Areas 3

  1. Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Catalytic processes and resource chemistry  / 電極触媒

  2. Nanotechnology/Materials / Inorganic compounds/materials chemistry

  3. Nanotechnology/Materials / Energy chemistry  / 水電解

To the head of Research Areas.▲

Research History 4

  1. Nagoya University   Department of Materials Chemistry, Graduate School of Engineering   Assistant Professor

    2026.4

    　 More details

    Country：Japan

    researchmap

  2. Japan Society for the Promotion of Science

    2024.4

    　 More details

    Country：Japan

    researchmap

  3. 鳥取大学 大学院工学研究科   プロジェクト研究員

    2024.1 - 2024.3

    　 More details

  4. International Platform for Dryland Research and Education (IPDRE)

    2023.5 - 2023.12

    　 More details

    Country：Japan

    researchmap

To the head of Research History.▲

Education 4

  1. Tottori University

    2023.4 - 2026.3

    　 More details

  2. Tottori University

    2021.4 - 2023.3

    　 More details

    Country： Japan

    researchmap

  3. Tottori University   Faculty of Engineering

    2017.4 - 2021.3

    　 More details

    Country： Japan

    researchmap

  4. Tottori University

    2017.4 - 2021.3

To the head of Education.▲

Professional Memberships 3

  1. 石油学会

    2026.4

    　 More details

  2. 触媒学会

    2022.5

    　 More details

  3. 電気化学会

    2021.6

    　 More details

To the head of Professional Memberships.▲

Awards 3

  1. Young Oral Presentation Award

    2025.5   20th Japan-Korea Symposium on Catalysis   Brownmillerite-type Ca2FeCoO5 Ultrathin Layers as Electrocatalysts for Oxygen Evolution Reaction

    　More details

    Award type：Award from international society, conference, symposium, etc.  Country：Japan

    researchmap

  2. 最優秀賞

    2023.12   鳥取大学工学部附属グリーン・サステイナブル・ケミストリー研究センター   鉄ーコバルト系水電解アノードの中性域における寿命決定因子の推察

    　More details

    鳥取地区化学講演会・発表会/ GSCセミナー

    researchmap

  3. 優秀学生講演賞

    2022.9   公益社団法人電気化学会光電気化学研究懇談会   中性域での長時間水電解に対するブラウンミラーライト型Fe-Co酸化物アノードの組成及び構造変化

    　More details

    Award type：Award from Japanese society, conference, symposium, etc.  Country：Japan

    2022年電気化学秋季大会

    researchmap

To the head of Awards.▲
 

Papers 7

  1. Synthesis of Brownmillerite-type Ca2Fe0.5Co1.5O5 as a Durable Electrocatalyst for Oxygen Evolution Reaction in Neutral Aqueous Solution Reviewed Open Access

    Hiroyuki OKADA, Etsushi TSUJI, Satoshi SUGANUMA, Naonobu KATADA

    Electrochemistry   Vol. 93 ( 12 ) page： 127005 - 127005   2025.12

    　More details

    Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Electrochemical Society of Japan  

    DOI： 10.5796/electrochemistry.25-00133

    Open Access

    researchmap

  2. Brownmillerite-Type Ca2FeCoO5 Ultrathin Layers as Anodic Catalysts for Water Electrolysis Reviewed Open Access

    Hiroyuki Okada, Ren Adachi, Etsushi Tsuji, Ryosuke Nanbu, Kazu Okumura, Sho Kitano, Hiroki Habazaki, Satoshi Suganuma, Naonobu Katada

    ACS Applied Nano Materials     2025.1

    　More details

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

    File： okada-et-al-2024-brownmillerite-type-ca2fecoo5-ultrathin-layers-as-anodic-catalysts-for-water-electrolysis.pdf

    DOI： 10.1021/acsanm.4c05466

    Open Access

    researchmap

  3. Brownmillerite-type Ca2Fe0.75Co1.25O5 as a robust electrocatalyst for the oxygen evolution reaction under neutral conditions Reviewed

    Hiroyuki Okada, Etsushi Tsuji, Miho Hisada, Sho Kitano, Hiroki Habazaki, Satoshi Suganuma, Naonobu Katada

    SUSTAINABLE ENERGY & FUELS   Vol. 6 ( 11 ) page： 2709 - 2717   2022.5

    　More details

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

    File： D2SE00320A.pdf

    DOI： 10.1039/d2se00320a

    Web of Science

    researchmap

  4. Influence of Oxide Reservoirs on the Performance of Direct Air Electrolysis Using NaClO4 as a Deliquescent Neutral Electrolyte Salt Reviewed

    Etsushi Tsuji, Miyu Watanabe, Watari Ikuta, Yuki Fujita, Hiroyuki Okada, Satoshi Suganuma, Naonobu Katada

    ACS Applied Energy Materials     2025.2

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsaem.4c03167

    researchmap

  5. Reduction Behaviors of Tin Oxides and Oxyhydroxides Itself during Electrochemical Reduction of Carbon Dioxide in an Aqueous Solution under Neutral Conditions Reviewed Open Access

    Etsushi Tsuji, Kaede Ohwan, Tomoki Ishikawa, Yuki Hirata, Hiroyuki Okada, Satoshi Suganuma, Naonobu Katada

    RSC Sustainability     2025.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry (RSC)  

    It is well known that tin oxides and oxyhydroxides show high selectivity for electrochemical CO<sub>2</sub> reduction reaction (CO<sub>2</sub>RR) to form HCOOH in aqueous solutions. The tin oxides and oxyhydroxides are...

    DOI： 10.1039/d4su00476k

    Open Access

    researchmap

  6. Metal‐free N, P‐Codoped Carbon for Syngas Production with Tunable Composition via CO2 Electrolysis: Addressing the Competition Between CO2 Reduction and H2 Evolution Reviewed Open Access

    Ryuji Takada, Hiroyuki Okada, Kotaro Narimatsu, Koji Miyake, Yoshiaki Uchida, Etsushi Tsuji, Norikazu Nishiyama

    ChemSusChem     2024.11

    　More details

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

    Electroreduction of carbon dioxide into value‐added fine chemicals is a promising technique to realize the carbon cycle. Recently, metal‐free heteroatom doped carbons are proposed as promising cost‐effective electrocatalysts for CO2 reduction reaction (CO2RR). However, the lack of understanding of the active site prevents the realization of a high‐performance electrocatalyst for the CO2RR. Herein, we synthesized metal‐free N, P co‐doped carbons (NPCs) for producing syngas, which is composed of H2 and CO, by CO2 electrolysis using inexpensive bio‐based raw materials via simple pyrolysis. The syngas ratio (H2/CO) can be controlled within the high demand range (0.3‐4) at low potentials using NPCs by tuning the N and P contents. In comparison with only N doping or P doping, N and P co‐doping has a positive impact on improving CO2RR activity. Experimental analysis and density functional theoretical (DFT) calculations revealed that negatively charged C atoms adjacent to N and P atoms are the most favorable active sites for CO2‐to‐CO conversion compared to pyridinic N on N, P co‐doped carbon. Introducing N atoms generates the preferable CO2 adsorption site, and P atoms contribute to decreasing the Gibbs free energy barrier for key *COOH intermediates adsorbed on the negatively charged C atoms.

    DOI： 10.1002/cssc.202402249

    Open Access

    researchmap

  7. Improvement of Photoelectrocatalytic Activity and Stability of WO 3 for Oxygen Photoevolution Reaction by Loading of Brownmillerite‐Type Ca 2 FeCoO 5 as a Cocatalyst Reviewed

    Etsushi Tsuji, Yoshiki Degami, Hiroyuki Okada, Satoshi Suganuma, Naonobu Katada

    Energy Technology   Vol. 9 ( 9 ) page： 2100197 - 2100197   2021.9

    　More details

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

    DOI： 10.1002/ente.202100197

    researchmap

▼display all

To the head of Papers.▲

MISC 1

  1. Crystalline Solid Solution Ultrasmall Particles as a Cocatalyst for Oxygen Photoevolution Reaction

    辻悦司, 岡田拓之

    電気化学   Vol. 90 ( 2 )   2022

    　More details

To the head of MISC.▲

Presentations 19

  1. 鉄-コバルト系酸化物のプロトン存在下での安定性と中性での酸素発生触媒活性

    岡田 拓之, 岸本 朋也, 辻 悦司, 北野 翔, 幅崎 浩樹, 片田 直伸

    第134回触媒討論会  2024.9.18 

    　More details

    Event date： 2024.9

    Language：Japanese   Presentation type：Oral presentation (general)  

    researchmap

  2. Development of Durable Oxides Anode with Brownmillerite-type Structure for Water Electrolysis at Neutral pH

    Hiroyuki Okada, Etsushi Tsuji, Sho Kitano, Hiroki Habazaki, Satoshi Suganuma, Naonobu Katada

    24th International Conference on Photochemical Conversion and Storage of Solar Energy  2024.7.29 

    　More details

    Event date： 2024.7 - 2024.8

    Language：English   Presentation type：Oral presentation (general)  

    researchmap

  3. Development of a Highly Robust Oxide Anode for Water Electrolysis at Neutral pH Consisting of Cobalt and Iron

    Hiroyuki Okada, Etsushi Tsuji, Sho Kitano, Hiroki Habazaki, Satoshi Suganuma, Naonobu Katada

    18th International Congress on Catalysis  2024.7.18 

    　More details

    Event date： 2024.7

    Language：English   Presentation type：Oral presentation (general)  

    researchmap

  4. Fe-Co系酸化物アノード触媒のプロトンに対する安定性と中性での水電解活性

    岡田 拓之, 岸本 朋也, 辻 悦司, 北野 翔, 幅崎 浩樹, 片田 直伸

    電気化学会第91回大会  2024.3.14 

    　More details

    Event date： 2024.3

    Presentation type：Oral presentation (general)  

    researchmap

  5. 鉄ーコバルト系水電解アノードの中性域における寿命決定因子の推察

    岡田拓之, 岸本朋也, 辻悦司, 菅沼学史, 片田直伸

    鳥取地区化学講演会・発表会/ GSCセミナー  2023.12.4 

    　More details

    Event date： 2023.12

    Language：Japanese   Presentation type：Oral presentation (general)  

    researchmap

  6. 中性域での長時間水電解に対するブラウンミラーライト型 Fe-Co 酸化物アノードの組成および構造変化

    岡田 拓之, 辻 悦司, 北野 翔, 幅崎 浩樹, 菅沼 学史, 片田 直伸

    2022年電気化学秋季大会，電気化学会  2022.9.9 

    　More details

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：神川大学みなとみらいキャンパス，神奈川県   Country：Japan  

    researchmap

  7. ブラウンミラーライト型鉄-コバルト酸化物上での異種酸化物の合成と酸素発生電極触媒活性への影響

    岡田拓之, 品川雄紀, 辻悦司, 片田直伸

    2023年電気化学会秋季大会，電気化学会  2023.9.11 

    　More details

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：九州大学伊都キャンパス，福岡県   Country：Japan  

    researchmap

  8. ブラウンミラーライト型酸化物上へのコバルト含有酸化物の合成と酸素発生電極触媒活性の向上

    岡田拓之, 品川雄紀, 辻悦司, 菅沼学史, 片田直伸

    第132回触媒討論会，触媒学会  2023.9.13 

    　More details

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：北海道大学札幌キャンパス，北海道   Country：Japan  

    researchmap

  9. ブラウンミラーライト型Fe-Co複合酸化物水電解アノードの中性における耐久性

    岡田 拓之, 辻 悦司, 北野 翔, 幅崎 浩樹, 菅沼 学史, 片田 直伸

    第130回触媒討論会，触媒学会  2022.9.20 

    　More details

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：富山大学五福キャンパス，富山県   Country：Japan  

    researchmap

  10. High Durability of Brownmillerite-type Ca2Fe0.75Co1.25O5 as Oxygen Evolution Catalyst in Neutral pH Range International conference

    Hiroyuki Okada, Etsushi Tsuji, Sho Kitano, Hiroki Habazaki, Satoshi Suganuma, Naonobu Katada

    15th European Congress on catalysis（EuropaCat2023）  2023.8.29 

    　More details

    Language：English   Presentation type：Poster presentation  

    Venue：Prague Congress Centre，Czech Republic   Country：Czech Republic  

    researchmap

  11. Brownmillerite-type Ca2FeCoO5 Ultrathin Layers as Electrocatalysts for Oxygen Evolution Reaction

    H. Okada, R. Adachi, E. Tsuji, R. Nanbu, K. Okumura, S. Kitano, H. Habazaki, S. Suganuma, N. Katada

    20th Japan-Korea Symposium on Catalysis  2025.5.20 

    　More details

    Language：English   Presentation type：Oral presentation (general)  

    researchmap

  12. Brownmillerite-type Ca2Fe0.75Co1.25O5 as a high durable catalyst for oxygen evolution reaction in neutral conditions International conference

    Hiroyuki Okada, Etsushi Tsuji, Satoshi Suganuma, Naonobu Katada

    The 9th Tokyo Conference on Advanced Catalytic Science and Technology（TOCAT9），触媒学会  2022.7.26 

    　More details

    Language：English   Presentation type：Poster presentation  

    Country：Japan  

    researchmap

  13. Formation of Brownmillerite-type Ca2FeCoO5 Ultrathin Layer and Its Electrocatalytic Activity for Oxygen Evolution Reaction

    Hiroyuki Okada, Ren Adachi, Etsushi Tsuji, Ryosuke Nanbu, Kazu Okumura, Sho Kitano, Hiroki Habazaki, Satoshi Suganuma, Naonobu Katada

    Pacifichem2025  2025.9.19 

    　More details

    Language：English   Presentation type：Poster presentation  

    researchmap

  14. 中性水溶液中でのブラウンミラーライト型Fe-Co系酸化物の電気化学的酸素発生に対する触媒活性

    岡田 拓之, 辻 悦司, 菅沼 学史, 片田 直伸

    第51回石油・石油化学討論会，石油学会  2021.11.11 

    　More details

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：函館アリーナ，函館  

    researchmap

  15. 中性での酸素発生反応を安定的に促進するブラウンミラーライト型Fe-Co系酸化物電極触媒

    岡田 拓之, 辻 悦司, 菅沼 学史, 片田 直伸

    2021年電気化学秋季大会，電気化学会  2021.9.8 

    　More details

    Language：Japanese   Presentation type：Oral presentation (general)  

    Venue：オンライン  

    researchmap

  16. 中性での酸素発生反応を安定的に促進するブラウンミラーライト型Fe-Co系酸化物触媒

    岡田 拓之, 辻 悦司, 菅沼 学史, 片田 直伸

    第40回光がかかわる触媒化学シンポジウム、触媒学会光触媒研究会  2021.7.16 

    　More details

    Language：Japanese   Presentation type：Poster presentation  

    Venue：オンライン  

    researchmap

  17. CO2還元を目指すブラウンミラーライト型 Fe-Co 系酸素発生電極触媒の開発

    岡田 拓之, 辻 悦司, 菅沼 学史, 片田 直伸

    第10回 JACI/GSCシンポジウム，新化学技術推進協会  2021.6.28 

    　More details

    Language：Japanese   Presentation type：Poster presentation  

    Venue：オンライン  

    researchmap

  18. 中性水電解用酸化物アノード触媒表面への酸化物ナノ薄膜の形成による長寿命化

    岡田 拓之, 品川 雄紀, 辻 悦司, 北野 翔, 幅崎 浩樹, 津野地 直, 片田 直伸

    2025電気化学秋季大会  2025.9.4 

    　More details

    Language：Japanese   Presentation type：Oral presentation (general)  

    researchmap

  19. 中性水電解用酸化物アノード触媒上への異種酸化物の担持と耐久性の向上

    岡田 拓之, 品川 雄紀, 辻 悦司, 北野 翔, 幅崎 浩樹, 津野地 直, 片田 直伸

    第136回触媒討論会  2025.9.19 

    　More details

    Language：Japanese   Presentation type：Oral presentation (general)  

    researchmap

▼display all

To the head of Presentations.▲

KAKENHI (Grants-in-Aid for Scientific Research) 1

  1. 水電解アノード表面のナノ制御を基にした中性での寿命決定因子の解明と触媒設計

    Grant number：24KJ1706  2024.4 - 2026.3

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

    岡田 拓之

    　 More details

To the head of KAKENHI (Grants-in-Aid for Scientific Research).▲
 

Academic Activities 1

  1. 20th Japan-Korea Symposium on Catalysis Short Oralセッション座長

    Role(s)：Panel moderator, session chair, etc.

    2025.5

    　More details

    Type：Competition, symposium, etc. 

    researchmap

To the head of Academic Activities.▲