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[MoO ((S₂) ₂L]^1- (L = ピコリネートまたはピリミジン-2-カルボキシレート) MoS_xとして複合体-水溶液中の水素生成のためのインスピレーション電解剤

Benjamin R Garrett¹, Kevin A Click¹, Christopher B Durr¹

¹Department of Chemistry and Biochemistry, The Ohio State University , 100 West 18th Avenue, Columbus, Ohio 43210, United States.

Journal of the American Chemical Society

|October 4, 2016

まとめ

2つの新しい水溶性モリブデン-硫黄 (Mo-S) 複合体は,優れた安定性を示し,水素進化反応 (HER) の効率的な均質の電解剤として作用する. これらの発見は,クリーンな水素生産のためのMo-S触媒材料の洞察を提供します.

科学分野:

無機化学
電気化学
カタリシス

背景:

モリブデン硫化物 (Mo-S) 触媒は地球に豊富に存在し,電気触媒による水素生成に有効である.
Mo-S触媒の分子模倣を開発することで,調節可能な電子特性と機械的洞察が得られます.
均質な電気触媒は反応機構と性質を制御する上で優れている.

研究の目的:

Mo-S触媒材料にインスパイアされた水溶性モリブデン-硫黄複合体を合成し,特徴づけること.
水素進化反応 (HER) のためのこれらの複合体の安定性と電解活性を評価する.
HERの均質な電気触媒として分子Mo-S複合体の可能性を調査する.

主な方法:

2つの水溶性Mo-S複合体の合成: (NEt4) [MoO ((S2) picolinate) ] (Mo-pic) と (NEt4) [MoO ((S2) pyrimidine-2-carboxylate) ] (Mo-pym)
安定性を評価するために1H NMR光譜を用いた特徴付け.
回転頻度 (TOF) と発症ポテンシャルを含むHERの触媒活性を決定する電気化学的評価.

主要な成果:

Mo-picは,d6-DMSO溶液で100 °Cで顕著な熱と有酸素の安定性を示した.
Mo-pic と Mo-pym は HER の均質な電気触媒として機能した.
Mo- pymは,Mo- pic (TOF 27 - 34 s-1,発症ポテンシャル 240 mV) と比較して,TOF 42 - 48 s-1と発症ポテンシャル 175 mVで,より高い触媒活性を示した.

結論:

合成されたMo-S複合体は,安定した,効果的な均質なHERの電気触媒です.
これらの分子模倣は,Mo-S電解への貴重な機械的洞察を提供します.
この研究は,効率的で安定した水素生産のための分子Mo-S複合体の設計の可能性を強調しています.

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