TY  - JOUR
AU  - Erini, Nina
AU  - Beermann, Vera
AU  - Gocyla, Martin
AU  - Gliech, Manuel
AU  - Heggen, Marc
AU  - Dunin-Borkowski, Rafal
AU  - Strasser, Peter
TI  - The Effect of Surface Site Ensembles on the Activity and Selectivity of Ethanol Electrooxidation by Octahedral PtNiRh Nanoparticles
JO  - Angewandte Chemie
VL  - 129
IS  - 23
SN  - 0044-8249
CY  - Weinheim
PB  - Wiley-VCH65543
M1  - FZJ-2017-06627
SP  - 6633 - 6638
PY  - 2017
AB  - 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.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1002/ange.201702332
UR  - https://juser.fz-juelich.de/record/837850
ER  -