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Promotional Effect of Palladium on the Hydrogen Oxidation Reaction at a PtPd Alloy Electrode
Author(s) -
Yoo Sung Jong,
Park HeeYoung,
Jeon TaeYeol,
Park InSu,
Cho YongHun,
Sung YungEun
Publication year - 2008
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200802749
Subject(s) - palladium , hydrogen , alloy , electrode , adsorption , materials science , catalysis , inorganic chemistry , chemistry , metallurgy , organic chemistry , biochemistry
A volcano curve is observed for the hydrogen oxidation reaction (HOR) as a function of the Pd content of alloyed PtPd electrodes. The maximum exchange current density was obtained for Pt 72 Pd 28 , and the results indicate that PdH x species (hydrogen gas spontaneously adsorbed to Pd; see picture) causes the electronic structure of Pt to be favorable for the HOR.