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The Effect of Surface Site Ensembles on the Activity and Selectivity of Ethanol Electrooxidation by Octahedral PtNiRh Nanoparticles.
- Source :
- Angewandte Chemie International Edition; Jun2017, Vol. 56 Issue 23, p6533-6538, 6p
- Publication Year :
- 2017
-
Abstract
- Direct ethanol fuel cells are attractive power sources based on a biorenewable, high energy-density fuel. Their efficiency is limited by the lack of active anode materials which catalyze the breaking of the C−C bond coupled to the 12-electron oxidation to CO<subscript>2</subscript>. We report shape-controlled PtNiRh octahedral ethanol oxidation electrocatalysts with excellent activity and previously unachieved low onset potentials as low as 0.1 V vs. RHE, while being highly selective to complete oxidation to CO<subscript>2</subscript>. Our comprehensive characterization and in situ electrochemical ATR studies suggest that the formation of a ternary surface site ensemble around the octahedral Pt<subscript>3</subscript>Ni<subscript>1</subscript>Rh<subscript>x</subscript> nanoparticles plays a crucial mechanistic role for this behavior. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14337851
- Volume :
- 56
- Issue :
- 23
- Database :
- Complementary Index
- Journal :
- Angewandte Chemie International Edition
- Publication Type :
- Academic Journal
- Accession number :
- 123188387
- Full Text :
- https://doi.org/10.1002/anie.201702332