Temperature Dependence of the Oxygen Reduction Kinetics on RuxSey/C Catalysts
Full article
| Общее |
Language:
Английский,
Genre:
Full article,
Status:
Published,
Source type:
Original
|
| Journal |
Fuel Cells
ISSN: 1615-6846
, E-ISSN: 1615-6854
|
| Output data |
Year: 2006,
Volume: 6,
Number: 3-4,
Pages: 203-207
Pages count
: 5
DOI:
10.1002/fuce.200600015
|
| Tags |
Activation Enthalpy, Electrochemical Oxygen Reduction Reaction, ORR, Pre-Exponential Factor, Reaction Kinetics, RuxSey/C Catalyst, Temperature Dependence, Transfer Coefficient |
| Authors |
Leveratto D.
1,2
,
Racz A.
1
,
Savinova E.R.
1,3
,
Stimming U.
1
|
| Affiliations |
| 1 |
Technische Universität München, Department of Physics E19, James-Franck-Str. 1, D-85748 Garching, Germany
|
| 2 |
AUDI AG, 85045 Ingolstadt, Germany
|
| 3 |
Boreskov Institute of Catalysis of the Russian Academy of Sciences, Pr. Lavrentieva 5, Novosibirsk 630090, Russia
|
|
Funding (1)
|
1
|
German Research Foundation
|
Sti74/8-4
|
The temperature dependence of the oxygen reduction kinetics on carbon-supported RuxSey catalysts is studied using a rotating disc electrode in 0.5 M H2SO4 in the temperature interval from 25 °C to 65 °C. When the absolute value of the overpotential is below ca. 0.65 V, the reaction is limited by a one-electron charge transfer step, where the transfer coefficient is independent of the temperature and equal to 0.44. The apparent activation enthalpy at zero overpotential is 0.49 eV and the pre-exponential factor is independent of the temperature.