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Catalysts 2017, 7(7), 220; doi:10.3390/catal7070220

Electroreduction of CO2 into Ethanol over an Active Catalyst: Copper Supported on Titania

Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China
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Received: 15 June 2017 / Revised: 15 July 2017 / Accepted: 18 July 2017 / Published: 20 July 2017
(This article belongs to the Special Issue Advances in Electrocatalysis)
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Abstract

A simple, inexpensive, and novel method was used to prepare electrocatalysts from Cu supported on titanium dioxide (Cu/TiO2). XRD, SEM, and TEM characterizations confirmed different loadings of Cu nanoparticles (NPs) on TiO2. Cyclic voltammetry tests indicated that Cu/TiO2 exhibited lower overpotential for CO2 reduction than that of Cu NPs. Moreover, 40 wt % Cu/TiO2 exhibited the highest faradaic efficiency for ethanol (FEethanol) of 27.4%, which is approximately 10-fold higher than that for Cu NPs (FEethanol = 2.7%). The 40 wt % Cu/TiO2 electrocatalyst exhibits a stable current density of 8.66 mA/cm2 over a 25 h stability test. The high efficiency towards CO2 electroreduction to ethanol may be attributed to the synergistic effect of Cu and TiO2 NPs. This work highlights the importance of compositional effect of NPs on their catalytic activities and provides a strategy for designing efficient catalysts for CO2 electroreduction in the future. View Full-Text
Keywords: CO2 reduction; Cu nanoparticles; titanium dioxide; faradaic efficiency; ethanol CO2 reduction; Cu nanoparticles; titanium dioxide; faradaic efficiency; ethanol
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Yuan, J.; Liu, L.; Guo, R.-R.; Zeng, S.; Wang, H.; Lu, J.-X. Electroreduction of CO2 into Ethanol over an Active Catalyst: Copper Supported on Titania. Catalysts 2017, 7, 220.

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