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Title: Electrochemical behaviour of naked sub-nanometre sized copper clusters and effect of CO 2

The study of the electrochemical behavior (in the presence of N 2 or CO 2) of size-controlled naked Cu 5 and Cu 20 nanoclusters, prepared using a combination of gas-phase cluster ion sources, mass spectrometry, and soft-landing techniques, evidences some relevant results regarding the redox behavior of these sub-nanometre sized copper particles and the effect of CO 2 on them. Cu 20 nanoclusters show anodic redox processes occurring at much lower potential with respect to Cu 5 nanoclusters, which behave relatively similar to much larger Cu particles. However, Cu 5 nanoclusters coordinate effectively CO 2 (hydrogen carbonate) in solution, different from Cu 20 nanoclusters and larger Cu particles. This effect, rather than the redox behavior, is apparently connected to the ability of Cu 5 nanoclusters to reduce CO 2 under cathodic conditions at low overpotential. In conclusion, although preliminary, these results provide rather exciting indications on the possibility of realizing low overpotential electrocatalytic conversion of CO 2.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3]
  1. Univ. of Messina (Italy). Dept. of Chemical, Biological, Pharmaceutical and Environmental Science; Univ. of Messina (Italy). Dept. of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division, X-ray Science Division, Nanoscience and Technology Division
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division, X-ray Science Division, Nanoscience and Technology Division; Yale Univ., New Haven, CT (United States). Dept. of Chemical and Environmental Engineering; Univ. of Chicago, IL (United States). Inst. for Molecular Engineering (IME)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Catalysis Science and Technology
Additional Journal Information:
Journal Volume: 6; Journal Issue: 18; Journal ID: ISSN 2044-4753
Publisher:
Royal Society of Chemistry
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
OSTI Identifier:
1352618