Catalytic Mismatching of CuInSe2 and Ni3Al Demonstrates Selective Photoelectrochemical CO2 Reduction to Methanol,ACS Applied Energy Materials

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Catalytic Mismatching of CuInSe2 and Ni3Al Demonstrates Selective Photoelectrochemical CO2 Reduction to Methanol
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-01-06 00:00:00 , DOI: 10.1021/acsaem.9b01441
Brian M. Foster ₁ , Aubrey R. Paris ₁ , Jessica J. Frick ₁ , Daniel A. Blasini-Pérez ₁ , Robert J. Cava ₁ , Andrew B. Bocarsly ₁

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Photoelectrochemical catalysts are often plagued by ineffective interfacial charge transfer or nonideal optical conversion properties. To overcome this challenge, strategically pairing a catalytically inactive, optically proficient semiconductor with a selective electrocatalyst, coined “catalytic mismatching”, is suggested. Here, chalcopyrite semiconductor CuInSe₂ is paired with the electrocatalyst Ni₃Al to selectively reduce CO₂. This catalytically mismatched system produces methanol at a Faradaic efficiency 25 times greater than that achieved using the purely electrochemical Ni₃Al system while reducing the operating potential requirement by 600 mV. These results suggest that catalytic mismatching is a promising tactic to achieve reaction selectivity in synergistic photoelectrochemical CO₂ reduction systems.

中文翻译：

CuInSe ₂和Ni ₃ Al的催化失配表明选择性光电化学将CO ₂还原为甲醇。

光电化学催化剂经常受到无效的界面电荷转移或不理想的光学转化性能的困扰。为了克服这一挑战，建议将催化惰性，光学上熟练的半导体与选择性电催化剂（称为“催化失配”）进行战略配对。这里，黄铜矿半导体CuInSe ₂与电催化剂Ni ₃ Al配对以选择性地还原CO ₂。这种催化失配的系统以法拉第效率生产的甲醇比使用纯电化学Ni _3所获得的效率高25倍Al系统，同时将工作电位要求降低了600 mV。这些结果表明，催化失配是在协同光电化学CO ₂还原系统中实现反应选择性的有前途的策略。

更新日期：2020-01-06

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