Chloride Ion Adsorption Enables Ampere‐Level CO2 Electroreduction over Silver Hollow Fiber
Authors:
- 19 September 2022
- journal article
- research article
- Published by Wiley in Angewandte Chemie International Edition
- Vol. 61 (42) , e202210432
Abstract
Electrochemical conversion of CO2 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 CO2 utilization. Herein, we report a facile tactic that enables exceedingly efficient CO2 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 CO2 reduction kinetics.Keywords
Funding Information
- Youth Innovation Promotion Association of the Chinese Academy of Sciences (E224301401)
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