On the Influence of the Metal Loading on the Structure of Carbon-Supported PtRu Catalysts and Their Electrocatalytic Activities in CO and Methanol Electrooxidation
Review
| Общее |
Language:
Английский,
Genre:
Review,
Status:
Published,
Source type:
Original
|
| Journal |
PCCP: Physical Chemistry Chemical Physics
ISSN: 1463-9076
, E-ISSN: 1463-9084
|
| Output data |
Year: 2007,
Volume: 9,
Number: 40,
Pages: 5476-5489
Pages count
: 14
DOI:
10.1039/b707598g
|
| Authors |
Gavrilov Alexei N.
1
,
Savinova Elena R.
2,3
,
Simonov Pavel A.
2
,
Zaikovskii Vladimir I.
2
,
Cherepanova Svetlana V.
2
,
Tsirlina Galina A.
1
,
Parmon Valentin N.
2
|
| Affiliations |
| 1 |
Lomonosov Moscow State University
|
| 2 |
Boreskov Institute of Catalysis SB RAS
|
| 3 |
University of Strasbourg
|
|
Funding (3)
|
1
|
Russian Foundation for Basic Research
|
06-03-32737
|
|
2
|
German Research Foundation
|
436RUS113-718-1-1
|
|
3
|
Russian Foundation for Basic Research
|
01-03-33132
|
PtRu (1 : 1) catalysts supported on low surface area carbon of the Sibunit family (SBET = 72 m2 g−1) with a metal percentage ranging from 5 to 60% are prepared and tested in a CO monolayer and for methanol oxidation in H2SO4 electrolyte. At low metal percentage small (<2 nm) alloy nanoparticles, uniformly distributed on the carbon surface, are formed. As the amount of metal per unit surface area of carbon increases, particles start coalescing and form first quasi two-dimensional, and then three-dimensional metal nanostructures. This results in a strong enhancement of specific catalytic activity in methanol oxidation and a decrease of the overpotential for CO monolayer oxidation. It is suggested that intergrain boundaries connecting crystalline domains in nanostructured PtRu catalysts produced at high metal-on-carbon loadings provide active sites for electrocatalytic processes.