Selective reduction of carbon dioxide to carbon monoxide over Au/CeO₂ catalyst and identification of reaction intermediate

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• 作者：Xiaobing Zhu ; Xin Qu ; Xiaosong Li ; Jinglin Liu ; Jianhao Liu ; Bin Zhu ; Chuan Shi ; ^{chuanshi@dlut.edu.cn}
• 关键词：CO2 reduction ; Au/CeO2 catalyst ; Carbon monoxide ; Formate intermediate ; In situ DRIFT spectroscopy
• 刊名：Chinese Journal of Catalysis
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：37
• 期：12
• 页码：2053-2058
• 全文大小：2863 K
• 卷排序：37

文摘

CO2 selective reduction to CO with H2 over a CeO2-supported nano-Au catalyst at atmospheric pressure was investigated. A high CO2 conversion, approaching the thermodynamic equilibrium value, and nearly 100% CO selectivity were obtained. The surface formate intermediates generated during the reverse water-gas shift reaction at 400 °C were identified using in situ diffuse-reflectance infrared Fourier-transform spectroscopy. The formate consumption to give CO and H2O, determined using mass spectrometry, indicated that the reaction proceeded via an associative formate mechanism; this contributes to the high Au/CeO2 catalytic activity at low temperatures.