pH非依存型水素酸化触媒を実現する原子層状白金基合金間化合物とリンピラーナノエンジニアリング
Renjie Gui1, Han Cheng1, Yi Tan1
1Key Laboratory of Precision and Intelligent Chemistry, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China.
Angewandte Chemie (International ed. in English)
|December 19, 2025
まとめ
ユニークな層間トンネルを持つ原子層状白金触媒は、水素酸化反応（HOR）活性とCO耐性を強化した。このブレークスルーは、小分子触媒向けの白金基触媒を進歩させる。
科学分野:
- 材料科学; 触媒; 電気化学
背景:
- 層状材料は、表面積と活性を増やすことで触媒効率を高めます。; 白金の結晶化傾向のため、原子層状白金合金間化合物の合成は困難です。
研究 の 目的:
- 原子層状白金合金間化合物の新規合成法を開発すること。; これらの新規触媒の水素酸化反応（HOR）活性とCO耐性を調査すること。
主な方法:
- ピラーナノエンジニアリングを用いて、自己支持型層間トンネルを持つPt5GaPおよびPt5InPナノ粒子を作成しました。; 触媒は、交互のPt5X（X = Ga/In）三層と「Pピラー」を特徴としています。
主要な成果:
- 「ピラー効果」はCOを遮断しながら選択的なH2輸送を促進しました。; Pt5InPは、市販のPt/Cと比較して、有意に高い質量活性（pH 1で13.9倍、pH 13で11.5倍）を示しました。; 新規触媒は例外的なCO耐性を示しました。
結論:
- 新規層状白金化合物は、優れたフルpH HOR活性とCO耐性を示します。; この一般化可能な戦略は、層間トンネルサイズを介して調整可能なCO耐性を持つ原子スケールの白金基触媒を可能にします。; この発見は、小分子触媒における触媒の適用範囲を広げます。
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