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二機能性電極の相乗効果による電気化学的バイオマス再生と水素製造

研究課題

研究課題/領域番号 22KF0204
補助金の研究課題番号 22F31328 (2022)
研究種目

特別研究員奨励費

配分区分基金 (2023)
補助金 (2022)
応募区分外国
審査区分 小区分36010:無機物質および無機材料化学関連
研究機関京都大学

研究代表者

北川 宏  京都大学, 理学研究科, 教授 (90234244)

研究分担者 DENG XIAOHUI  京都大学, 理学研究科, 外国人特別研究員
研究期間 (年度) 2023-03-08 – 2024-03-31
研究課題ステータス 完了 (2023年度)
配分額 *注記
2,300千円 (直接経費: 2,300千円)
2023年度: 1,100千円 (直接経費: 1,100千円)
2022年度: 1,200千円 (直接経費: 1,200千円)
キーワードhigh-entropy materials / selenide / amorphous materials / crystalline materials / hydrogen evolution / nanoparticle / high-entropy alloy / electrochemistry
研究開始時の研究の概要

High-entropy materials significantly expand the materials library for various catalytic applications. In this research, the fabrication of novel high-entropy nanoparticles will be conducted and their atomic structure will be elucidated. To demonstrate the advantage of high-entropy configuration, the electrochemical activity towards energy-related applications will be investigated. This research is expected to guide the design of highly-efficient catalysts by exploiting the high-entropy configuration.

研究実績の概要

The overall research is focused on the fabrication, structural elucidation and exploration of catalytic activities of amorphous and crystalline platinum-group metal (PGM) selenides.
A hot injection method was employed to prepare the selenides. The amorphous and crystalline selenides were obtained by modifying the preparation methods or thermal annealing. The amorphous and crystalline high-entropy PGM selenide with a single cubic phase was prepared for the first time. The crystallinity of monometallic selenides was also tuned. The materials were characterized by X-ray diffraction, electron microscopy, X-ray fluorescence spectroscopy, X-ray photon spectroscopy and other methods. The atomic coordination, short- and long-range order in amorphous and crystalline high-entropy selenides were systematically studied.
It was revealed that factors such as surfactant capping, precursor reactivity or nucleation/growth kinetics do not display significant roles toward amorphous structure. On the other hand, the multi-element composition contributes to the amorphous structure of high-entropy selenide probably due to various amorphous/crystalline structures of different PGM selenides. During its formation, the long-range order that could be present in the monometallic selenides is disturbed by the incorporation of other elements that favor disordered structure.
The amorphous HE-selenide exhibits superior acidic hydrogen evolution activity compared with monometallic selenides and also crystalline counterpart, demonstrating the advantages of high-entropy configuration and amorphous structure.

報告書

(2件)
  • 2023 実績報告書
  • 2022 実績報告書

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公開日: 2022-07-28   更新日: 2024-12-25  

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