%0 Journal Article
%A Erini, Nina
%A Beermann, Vera
%A Gocyla, Martin
%A Gliech, Manuel
%A Heggen, Marc
%A Dunin-Borkowski, Rafal
%A Strasser, Peter
%T The Effect of Surface Site Ensembles on the Activity and Selectivity of Ethanol Electrooxidation by Octahedral PtNiRh Nanoparticles
%J Angewandte Chemie
%V 129
%N 23
%@ 0044-8249
%C Weinheim
%I Wiley-VCH65543
%M FZJ-2017-06627
%P 6633 - 6638
%D 2017
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1002/ange.201702332
%U https://juser.fz-juelich.de/record/837850