In:
Angewandte Chemie, Wiley, Vol. 134, No. 42 ( 2022-10-17)
Abstract:
Electrochemical conversion of CO 2 into valuable feedstocks is a promising strategy for carbon neutrality. However, it remains a challenge to possess a large current density, a high faradaic efficiency and excellent stability for practical applications of CO 2 utilization. Herein, we report a facile tactic that enables exceedingly efficient CO 2 electroreduction to CO by virtue of low‐coordination chloride ion (Cl − ) adsorption on a silver hollow fiber (Ag HF) electrode. A CO faradaic efficiency of 92.3 % at a current density of one ampere per square centimeter (1 A cm −2 ) in 3.0 M KCl with a sustained performance observed during a 150‐hour test was achieved, which is better than state‐of‐the‐art electrocatalysts. The electrochemical results and density functional theory (DFT) calculations suggested a low‐coordination Cl − adsorption on surface of Ag HF, which not only suppressed the competitive hydrogen evolution reaction (HER), but also facilitated the CO 2 reduction kinetics.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v134.42
DOI:
10.1002/ange.202210432
Language:
English
Publisher:
Wiley
Publication Date:
2022
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