Thickness- and Particle-Size-Dependent Electrochemical Reduction of Carbon Dioxide on Thin-Layer Porous Silver Electrodes

Lin Zhang; Zhiyong Wang; Nada Mehio; Xianbo Jin; Sheng Dai

doi:10.1002/cssc.201501637

Thickness- and Particle-Size-Dependent Electrochemical Reduction of Carbon Dioxide on Thin-Layer Porous Silver Electrodes

Lin Zhang, Zhiyong Wang, Nada Mehio, Xianbo Jin, Sheng Dai

Chemical Sciences Division

Research output: Contribution to journal › Article › peer-review

50 Scopus citations

Abstract

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 6 μm thick silver film with particle sizes of 30-50 nm delivers a CO formation current of 10.5 mAcm^-2 and a mass activity of 4.38 Ag_Ag ^-1 at an overpotential of 0.39 V, comparable to levels achieved with state-of-the-art gold catalysts.

Original language	English
Pages (from-to)	428-432
Number of pages	5
Journal	ChemSusChem
Volume	9
Issue number	5
DOIs	https://doi.org/10.1002/cssc.201501637
State	Published - Mar 8 2016

Funding

This work is supported by NSFCs (21173161), the MOE Program (NCET-11-0397), and the Fundamental Research Funds for the Central Universities of Wuhan University. N.M. and S.D. were supported by 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.

Keywords

carbon dioxide chemistry
electrochemistry
heterogeneous catalysis
porous materials
silver

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10.1002/cssc.201501637

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abstract = "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 6 μm thick silver film with particle sizes of 30-50 nm delivers a CO formation current of 10.5 mAcm-2 and a mass activity of 4.38 AgAg -1 at an overpotential of 0.39 V, comparable to levels achieved with state-of-the-art gold catalysts.",

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AU - Dai, Sheng

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AB - 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 6 μm thick silver film with particle sizes of 30-50 nm delivers a CO formation current of 10.5 mAcm-2 and a mass activity of 4.38 AgAg -1 at an overpotential of 0.39 V, comparable to levels achieved with state-of-the-art gold catalysts.

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Thickness- and Particle-Size-Dependent Electrochemical Reduction of Carbon Dioxide on Thin-Layer Porous Silver Electrodes

Abstract

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Keywords

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