Photoelectrochemical CO2 Reduction to Acetate on Iron–Copper Oxide Catalysts

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• 作者：Xin Yang ; Elizabeth A. Fugate ; Yutichai Mueanngern ; L. Robert Baker
• 刊名：ACS Catalysis
• 出版年：2017
• 出版时间：January 6, 2017
• 年：2017
• 卷：7
• 期：1
• 页码：177-180
• 全文大小：347K
• ISSN：2155-5435

文摘

We demonstrate the ability to convert CO₂ to acetate with 80% Faradaic efficiency, using a mixed Fe–Cu oxide catalyst at −0.4 V bias vs Ag/AgCl during visible light illumination. Analysis shows that the selective catalyst is a mixed-phase material consisting of CuFeO₂ and CuO. By varying the Fe:Cu atomic fraction from 1.3 to 0.1, it is possible to tune the selectivity for CO₂ reduction from primarily acetate to primarily formate. These results identify a new low-cost, Earth-abundant material capable of synthesizing an energy-dense liquid directly from CO₂ and show that selectivity for CO₂ reduction can be tuned by controlling catalyst composition in mixed Fe–Cu oxide catalysts.