On the Enhanced Electrocatalytic Activity of Pd Overlayers on Carbon-Supported Gold Particles in Hydrogen Electrooxidation
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
PCCP: Physical Chemistry Chemical Physics
ISSN: 1463-9076
, E-ISSN: 1463-9084
|
| Output data |
Year: 2008,
Volume: 10,
Number: 44,
Pages: 6665-6676
Pages count
: 12
DOI:
10.1039/b803703e
|
| Authors |
Ruvinsky Pavel S.
1,2
,
Pronkin Sergey N.
1,2
,
Zaikovskii Vladimir I.
2
,
Bernhardt Pierre
1
,
Savinova Elena R.
1,2
|
| Affiliations |
| 1 |
Laboratory of Materials, Surfaces and Catalytic Processes, UMR 7515 of CNRS-ULP-ECPM, University Louis Pasteur, 25 Rue Becquerel, 67087 Strasbourg, France
|
| 2 |
Boreskov Institute of Catalysis, Pr. Lavrentieva 5, 630090 Novosibirsk, Russia
|
|
Funding (3)
|
1
|
European Commission
|
32175 FP6-2004-NMP-TI-4 FCANODE
|
|
2
|
The French National Research Agency
|
ANR-06-CEXC-004
|
|
3
|
Russian Foundation for Basic Research
|
06-03-32737
|
Palladium-gold particles with varied composition were prepared by Pd electrochemical deposition on Au nanoparticles immobilized on model carbon support. Pd–Au/C catalysts were characterized ex situ by transmission electron microscopy, energy dispersive X-ray analysis and X-ray photoelectron spectroscopy, and in situ, by underpotential deposition of hydrogen and copper adatoms, and CO stripping. Hydrogen oxidation reaction on pristine and CO-poisoned Pd–Au/C particles was studied using rotating disk electrode (RDE) technique. It was found that the decrease of the effective Pd overlayer thickness below ca. two monolayers resulted in a two-fold increase of the exchange current density of the hydrogen oxidation reaction and in significant increase of CO tolerance.