title: Thickness- and Particle-Size-Dependent Electrochemical Reduction of Carbon Dioxide on Thin-Layer Porous Silver Electrodes.
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 mA cm(-2) and a mass activity of 4.38 A gAg (-1) at an overpotential of 0.39 V, comparable to levels achieved with state-of-the-art gold catalysts.
authors.affiliation: College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, PR China.
authors.forename: Lin
authors.initials: L
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, PR China.
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Wang
authors.affiliation: Department of Chemistry, The University of Tennessee, Knoxville, TN, 37996, USA.
authors.forename: Nada
authors.initials: N
authors.lastname: Mehio
authors.affiliation: College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan, 430072, PR China. xbjin@whu.edu.cn.|Department of Chemistry, The University of Tennessee, Knoxville, TN, 37996, USA. xbjin@whu.edu.cn.
authors.forename: Xianbo
authors.initials: X
authors.lastname: Jin
authors.affiliation: Department of Chemistry, The University of Tennessee, Knoxville, TN, 37996, USA. dais@ornl.gov.|Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA. dais@ornl.gov.
authors.forename: Sheng
authors.initials: S
authors.lastname: Dai
mesh_terms: D002245:Carbon Dioxide / Q000737:chemistry*; D055664:Electrochemical Techniques / Q000379:methods*; D004566:Electrodes; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D016062:Porosity; D018030:Silver Compounds / Q000737:chemistry*
chemical_list: D018030:Silver Compounds; D002245:Carbon Dioxide; C037548:silver chloride
keywords: carbon dioxide chemistry; electrochemistry; heterogeneous catalysis; porous materials; silver