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Highly dispersed, single-site copper catalysts for the electroreduction of CO2 to methane

Journal Article · · Journal of Electroanalytical Chemistry
 [1];  [2];  [3];  [3];  [2];  [2]
  1. Univ. of Illinois at Urbana-Champaign, IL (United States)
  2. Univ. of Illinois at Urbana-Champaign, IL (United States); Kyushu Univ., Fukuoka (Japan)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Chemical Sciences and Engineering Division

In this study, pyrolyzing Cu(II) precursors absorbed on carbon black gave an eletrocatalytic material for the electroreduction of CO2. Controlled potential electrolysis and GC analysis revealed an unexpected selectivity towards methane even in alkaline media, with a methane Faradaic efficiency as high as 42%, a partial current density of 100 mA/cm2 (at –1 V vs. RHE) and a methane/ethylene ratio of 4:1. XPS, EXAFS, and EDX mapping results indicate a single-site Cu(I) center as the catalytically active site. The limited size of the active sites is believed to be crucial for the preferential formation of methane over ethylene.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE; National Science Foundation (NSF); Ministry of Education, Culture, Sports, Science, and Technology of Japan (MEXT)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1831425
Journal Information:
Journal of Electroanalytical Chemistry, Journal Name: Journal of Electroanalytical Chemistry Vol. 875; ISSN 1572-6657
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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