Qin Cheng, Ming Huang, Lei Xiao, Shiyong Mou, Xiaoli Zhao*, Yuqun Xie, Guodong Jiang, Xinyue Jiang and Fan Dong*,
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引用次数: 14
Abstract
Rational engineering of oxygen vacancies in a metal oxide-based catalyst represents an effective strategy to regulate catalytic performances by influencing both their electrochemical active surface areas and the microelectronic structure. However, the precise control and modulation of the concentration and uniformity of oxygen vacancies on the catalyst surface still remains inadequately explored and poorly elucidated. Herein, we develop a facile and effective method to prepare a series of In2O3 nanorods with varying oxygen vacancy concentrations for efficient electrolytic CO2 reduction to formate. Experimental results and theoretical calculations reveal that the abundant oxygen vacancies in the In2O3 catalyst significantly improve CO2 activation and promote the production of *HCOO intermediates, achieving a maximum formate Faradaic efficiency of 91.2% at −1.27 V vs a reversible hydrogen electrode (RHE) with high partial current density and, meanwhile, superior stability. The underlying relationship between the oxygen vacancy concentration and CO2 reduction reaction (CO2RR) performance was further established. This work offers a feasible strategy to finely tune the oxygen vacancy concentration in p-block metal oxide-based catalysts for highly efficient electrolytic CO2RR.
期刊介绍:
ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels.
The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.