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Description:

A copper−zirconia composite having an evenly distributed lamellar texture, Cu#ZrO2, was synthesized by promoting nanophase separation of the Cu51Zr14 alloy precursor in a mixture of carbon monoxide (CO) and oxygen (O2). High- resolution electron microscopy revealed that the material consists of interchangeable Cu and t-ZrO2 phases with an average thickness of 5 nm. Cu#ZrO2 exhibited enhanced selectivity toward the generation of formic acid (HCOOH) by electrochemical reduction of carbon dioxide (CO2) in aqueous media at a Faradaic efficiency of 83.5% at −0.9 V versus the reversible hydrogen electrode. In situ Raman spectroscopy has revealed that a bifunctional interplay between the Zr4+ sites and the Cu boundary leads to amended reaction selectivity along with a large number of catalytic sites.

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• Creative Commons BY Attribution 4.0 International
  

Keyword: nanophase separation, Cu51Zr14, Cu#ZrO2, electrochemical CO2 reduction, bifunctional catalysis, in situ Raman, formic acid

Date published: 2023-05-17

Publisher: American Chemical Society (ACS)

Journal:

• ACS Applied Materials & Interfaces (ISSN: 19448252) vol. 15 issue. 19 p. 23299-23305

Funding:

• Ministry of Education, Culture, Sports, Science and Technology JPMJSC18H7
• Ministry of Education, Culture, Sports, Science and Technology JPMJCR15P1
• Japan International Cooperation Agency

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1021/acsami.3c02874

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Updated at: 2024-12-18 16:30:58 +0900

Published on MDR: 2024-12-18 16:30:58 +0900