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journal article·2024-10-07

Fabrication of Cu–CeO2 Catalyst with Abundant Interfacial Cu+–O–Ce3+–OV (Oxygen Vacancy) Sites for Boosting CO2 Electroreduction to Methane

Shao-Chen Wang, Xiang Ji, Rui Hou, Longlong Qi, Peng Jing, Xuan Xu, Baocang Liu, Jun Zhang

ACS Materials Letters· Volume 6· Issue 10
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Source abstract

Abstract

Accelerating the conversion of *CO to *CHO and promoting the adsorption and hydrogenation of *CHO are the keys to achieving a highly selective electrocatalytic CO 2 reduction reaction (CO 2 RR) to CH 4 over Cu-based catalysts. Herein, a novel electrocatalyst comprising highly dispersed Cu nanoclusters (Cu NCs ) supported on oxygen vacancy (O V )-rich CeO 2 on carbon paper (Cu NCs –CeO 2 /CP) with plentiful interfacial Cu + –O–Ce 3+ –O V sites is constructed via a facile electrodeposition method. Various in situ / ex situ characterizations and theoretical calculations unveil that the Cu + –O–Ce 3+ –O V sites can effectively regulate the pathway of the CO 2 RR, accelerate the *CO → *CHO process, stabilize the *CHO and *OCH 3 intermediates, and promote their hydrogenation to produce CH 4 . Furthermore, the critical role of Ce 3+ and the O V species in forming Cu + –O–Ce 3+ –O V to maintain the electrocatalytic CO 2 RR activity is revealed. The optimized Cu NCs –CeO 2 /CP electrocatalyst exhibits a CH 4 Faradaic efficiency of 68.3% at 500 mA cm –2, with a high partial current density of 340 mA cm –2 .
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Ionic liquids properties and applications · Catalytic Processes in Materials Science

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemistry and Chemical Engineering, Inner Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules, Inner Mongolia University, 49 Xilinguole South Road, Hohhot 010020, People’s Republic of China

School of Chemistry and Environmental Science, Inner Mongolia Normal University, 81 Zhaowuda Road, Hohhot 010022, People’s Republic of China

Funding

Department of Science and Technology of Inner Mongolia Autonomous Region · Natural Science Foundation of Inner Mongolia Autonomous Region · National Natural Science Foundation of China · Higher Education Discipline Innovation Project · Science and Technology Project of Ordos · Grassland Talent Innovation Team of Inner Mongolia · Program for Innovative Research Team in Universities of Inner Mongolia Autonomous Region · Grassland Leading Talent Program of Inner Mongolia

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