期刊
NANO LETTERS
卷 11, 期 9, 页码 3714-3719出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl2017459
关键词
Electrochemistry; fuel cells; heterogeneous catalysis; monolayers; density functional theory calculations
类别
资金
- Office of Science of the Department of Energy [DE-AC05-00OR22725]
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.
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