Journal
CHEMPHYSCHEM
Volume 11, Issue 13, Pages 2942-2950Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201000452
Keywords
catalysis; electrochemistry; nanoparticles; platinum; XAFS spectroscopy
Funding
- U.S. Department of Energy Office of Basic Energy Sciences [DE-FG02-09ER16090]
- Robert A. Welch Foundation [F-0032]
- Department of Energy [DE-FG02-03ER15476]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- U. S. Department of Energy [DE-FG02-05ER15688]
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We report an in situ X-ray absorption fine structure (XAFS) spectroscopic analysis of similar to 1.8 nm pt dendrimer-encapsulated nanoparticles (DENs) during electrocatalytic oxidation of CO. The results indicate that Pt nanoparticles encapsulated within poly(amidoamine) (PAMAM) dendrimers and immobilized on a carbon electrode retain their electrocatalytic activity and are structuraly stabel for extended period during CO oxidation. This is a significant finding, because nanoparticles in this size range are good experimental models for comparison to first principles calculations if they remain stable.
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