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      Lewis Acid Site-Promoted Single-Atomic Cu Catalyzes Electrochemical CO2 Methanation.

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          Abstract

          Developing an efficient catalyst for the electrocatalytic CO2 reduction reaction (CO2RR) is highly desired because of environmental and energy issues. Herein, we report a single-atomic-site Cu catalyst supported by a Lewis acid for electrocatalytic CO2 reduction to CH4. Theoretical calculations suggested that Lewis acid sites in metal oxides (e.g., Al2O3, Cr2O3) can regulate the electronic structure of Cu atoms by optimizing intermediate absorption to promote CO2 methanation. Based on these theoretical results, ultrathin porous Al2O3 with enriched Lewis acid sites was explored as an anchor for Cu single atoms; this modification achieved a faradaic efficiency (FE) of 62% at -1.2 V (vs RHE) with a corresponding current density of 153.0 mA cm-2 for CH4 formation. This work demonstrates an effective strategy for tailoring the electronic structure of Cu single atoms for the highly efficient reduction of CO2 into CH4.

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          Author and article information

          Journal
          Nano Lett
          Nano letters
          American Chemical Society (ACS)
          1530-6992
          1530-6984
          Sep 08 2021
          : 21
          : 17
          Affiliations
          [1 ] Department of Chemistry, Tsinghua University, Beijing 100084, P. R. China.
          [2 ] State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, P. R China.
          [3 ] Henan Province Industrial Technology Research Institute of Resources and Materials, School of Material Science and Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China.
          [4 ] Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, P. R. China.
          [5 ] School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
          Article
          10.1021/acs.nanolett.1c02502
          34493045
          9aad0ec0-adc7-4510-a292-6512eca2aeef
          History

          Lewis acid,single-atom Cu catalyst,Al2O3,CH4,CO2RR
          Lewis acid, single-atom Cu catalyst, Al2O3, CH4, CO2RR

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