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Thickness‐ and Particle‐Size‐Dependent Electrochemical Reduction of Carbon Dioxide on Thin‐Layer Porous Silver Electrodes
Author(s) -
Zhang Lin,
Wang Zhiyong,
Mehio Nada,
Jin Xianbo,
Dai Sheng
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201501637
Subject(s) - overpotential , materials science , electrochemistry , electrochemical reduction of carbon dioxide , chemical engineering , particle (ecology) , catalysis , particle size , layer (electronics) , substrate (aquarium) , electrode , porosity , electrocatalyst , inorganic chemistry , carbon fibers , nanotechnology , chemistry , composite material , organic chemistry , carbon monoxide , oceanography , composite number , engineering , geology
The electrochemical reduction of CO 2 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 CO 2 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 CO 2 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 g Ag −1 at an overpotential of 0.39 V, comparable to levels achieved with state‐of‐the‐art gold catalysts.