Fabrication of Au Catalysts for Electrochemical Reduction of CO2 to Syngas
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY(2016)
摘要
In this study, we investigated the electrochemical conversion of CO2 for producing syngas, which is a mixture of CO and H-2, using Au electrodes fabricated by physical vapor deposition (PVD Au), electrodeposition (ED Au), and the combination of the PVD and ED processes (PVD + ED Au). The PVD Au electrode effectively catalyzed the conversion of CO2 into CO because of the good crystallinity and high coverage of Au on its surface; however, the electrochemically active surface area was relatively small, leading to low yields of syngas. In the case of the ED Au electrode, which had low crystallinity and a high surface area of Au, the selectivity for CO production was low and H-2 gas was produced as the primary product. The PVD + ED Au electrode had both high crystallinity and a large surface area of Au, resulting in the production of syngas composed of significant amounts of CO and H-2. This result suggests the suitability of PVD + ED Au as an efficient electrode for syngas production through the electrochemical reduction of CO2.
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关键词
CO2 Reduction,Syngas,Au Thin Film,Electrodeposition,Physical Vapor Deposition
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