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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Large-scale synthesis of zinc oxide-supported indium single-atom catalysts for efficient electrocatalytic CO2
Wenzhao Duan1, Tianrui Lu1, Qiuyue Xiang1
1Key Lab of Advanced Energy Storage and Conversion, College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, China. zj0608wang@163.com.
Abstract:
Electrocatalytic CO2 reduction reaction (eCO2RR) represents a pivotal technology for converting CO2 into fuels and chemicals using renewable electricity, with formic acid being a highly valued product. This work reports the large-scale synthesis of zinc oxide-supported indium single-atom catalysts (ZnO@In-SACs) by a modified micro-impinging stream synthesis method and investigates its performance for eCO2RR. We demonstrate that the reconstructed ZnO nanosheet support optimally tunes the electronic configuration of In single-atom sites during electrolysis, leading to a remarkable enhancement in catalytic activity. Optimized ZnO@In-SACs exhibit exceptional selectivity toward formate and outstanding stability in an alkaline flow electrolyzer for eCO2RR, with a high faradaic efficiency of 85% and a decent durability of 40 hours at a current density of 100 mA cm-2, surpassing most reported single-atom catalysts. This work provides an efficient large-scale strategy for fabricating catalysts to be utilized in different electrochemical reactions.
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