Journal
CHEMSUSCHEM
Volume 9, Issue 5, Pages 428-432Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201501637
Keywords
carbon dioxide chemistry; electrochemistry; heterogeneous catalysis; porous materials; silver
Funding
- NSFCs [21173161]
- MOE Program [NCET-11-0397]
- Fundamental Research Funds for the Central Universities of Wuhan University
- Fluid Interface Reactions, Structures, and Transport (FIRST) Center, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences
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The electrochemical reduction of CO2 can not only convert it back into fuels, but is also an efficient manner to store forms of renewable energy. Catalysis with silver is a possible technology for CO2 reduction. We report that in the case of monolithic porous silver, the film thickness and primary particle size of the silver particles, which can be controlled by electrochemical growth/reduction of AgCl film on silver substrate, have a strong influence on the electrocatalytic activity towards CO2 reduction. A 6m thick silver film with particle sizes of 30-50nm delivers a CO formation current of 10.5mAcm(-2) and a mass activity of 4.38Ag(Ag)(-1) at an overpotential of 0.39V, comparable to levels achieved with state-of-the-art gold catalysts.
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