NDLI: Unique activity of Pd monomers: hydrogen evolution at AuPd(111) surface alloys

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Pluntke, Y. Kibler, L. A. Kolb, D. M.
Description	Country affiliation: Germany Author Affiliation: Pluntke Y ( Institute of Electrochemistry, University of Ulm, 89069, Ulm, Germany.)
Abstract	Well-defined Au/Pd(111) alloy films have been prepared on a Ru(0001) substrate by electrochemical metal deposition and subsequent heating up to 700 °C. The electrochemical behaviour of the 20 monolayers thick epitaxially-grown films is in excellent agreement with both equilibrium surface composition and distribution for Au/Pd alloys on Mo(110) as previously reported (D. W. Goodman et al., J. Phys. Chem., 2005, B109, 18535). The electrocatalytic activity of the AuPd(111) surface alloys was studied for the hydrogen evolution in 0.1 M $H_{2}SO_{4}$ as a function of surface composition. Maximum activities were found for Pd fractions of 0.2 ± 0.1, where the population of Pd atoms surrounded by Au has its maximum. These Pd monomers are found to be about 20 times more active than Pd atoms in the Pd overlayer.
File Format	HTM / HTML
ISSN	14639076
Issue Number	25
Volume Number	10
e-ISSN	14639084
Journal	Physical Chemistry Chemical Physics
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2008-07-07
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Physics Discipline Biophysics Discipline Chemistry Alloys Chemistry Gold Hydrogen Palladium Adsorption Catalysis Electrochemistry Electrodes Electroplating Hot Temperature Oxidation-reduction Ruthenium Sulfuric Acids Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Physical and Theoretical Chemistry

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