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- Title
The Effect of Surface Site Ensembles on the Activity and Selectivity of Ethanol Electrooxidation by Octahedral PtNiRh Nanoparticles.
- Authors
Erini, Nina; Beermann, Vera; Gocyla, Martin; Gliech, Manuel; Heggen, Marc; Dunin‐Borkowski, Rafal E.; Strasser, Peter
- 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 CO2. 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 CO2. Our comprehensive characterization and in situ electrochemical ATR studies suggest that the formation of a ternary surface site ensemble around the octahedral Pt3Ni1Rhx nanoparticles plays a crucial mechanistic role for this behavior.
- Subjects
DIRECT ethanol fuel cells; ETHANOL; PLATINUM alloys; METAL nanoparticles; ENERGY density of fuel
- Publication
Angewandte Chemie, 2017, Vol 129, Issue 23, p6633
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201702332