Electrocatalysis on Platinum Nanoparticles: Particle Size Effect on Oxygen Reduction Reaction Activity

Journal Article · Wed Sep 14 00:00:00 EDT 2011 · Nano Letters

DOI:https://doi.org/10.1021/nl2017459· OSTI ID:1564753

Shao, Minhua; Peles, Amra; Shoemaker, Krista

We determined the size-dependent specific and mass activities of the oxygen reduction in HClO4 solutions on the Pt particles in the range of 1–5 nm. The maximal mass activity at 2.2 nm is well explained based on density functional theory calculations performed on fully relaxed nanoparticles. The presence of the edge sites is the main reason for the low specific activity in nanoparticles due to very strong oxygen binding energies at these sites. Our results clearly demonstrate that the catalytic activity highly depends on the shape and size of the nanoparticles.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); UT-Battelle LLC/ORNL, Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1564753
• Journal Information: Nano Letters, Vol. 11, Issue 9; ISSN 1530-6984
• Publisher: American Chemical Society
• Country of Publication: United States
• Language: English

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