Temperature dependence of the oxygen reduction kinetics on Ru xSey/C catalysts

D. Leveratto; A. Racz; E. R. Savinova; U. Stimming

doi:10.1002/fuce.200600015

Temperature dependence of the oxygen reduction kinetics on Ru _xSe_y/C catalysts

D. Leveratto, A. Racz, E. R. Savinova, U. Stimming

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14 Scopus citations

Abstract

The temperature dependence of the oxygen reduction kinetics on carbon-supported Ru_xSe_y 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 over-potential is 0.49 eV and the pre-exponential factor is independent of the temperature.

Original language	English
Pages (from-to)	203-207
Number of pages	5
Journal	Fuel Cells
Volume	6
Issue number	3-4
DOIs	https://doi.org/10.1002/fuce.200600015
State	Published - Jul 2006

Keywords

Activation Enthalpy
Electrochemical Oxygen Reduction Reaction
ORR
Pre-Exponential Factor
Reaction Kinetics
RuSe/C Catalyst
Temperature Dependence
Transfer Coefficient

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10.1002/fuce.200600015

Cite this

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title = "Temperature dependence of the oxygen reduction kinetics on Ru xSey/C catalysts",

abstract = "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 over-potential is 0.49 eV and the pre-exponential factor is independent of the temperature.",

keywords = "Activation Enthalpy, Electrochemical Oxygen Reduction Reaction, ORR, Pre-Exponential Factor, Reaction Kinetics, RuSe/C Catalyst, Temperature Dependence, Transfer Coefficient",

author = "D. Leveratto and A. Racz and Savinova, {E. R.} and U. Stimming",

year = "2006",

month = jul,

doi = "10.1002/fuce.200600015",

language = "English",

volume = "6",

pages = "203--207",

journal = "Fuel Cells",

issn = "1615-6846",

publisher = "John Wiley and Sons Ltd",

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TY - JOUR

T1 - Temperature dependence of the oxygen reduction kinetics on Ru xSey/C catalysts

AU - Leveratto, D.

AU - Racz, A.

AU - Savinova, E. R.

AU - Stimming, U.

PY - 2006/7

Y1 - 2006/7

N2 - 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 over-potential is 0.49 eV and the pre-exponential factor is independent of the temperature.

AB - 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 over-potential is 0.49 eV and the pre-exponential factor is independent of the temperature.

KW - Activation Enthalpy

KW - Electrochemical Oxygen Reduction Reaction

KW - ORR

KW - Pre-Exponential Factor

KW - Reaction Kinetics

KW - RuSe/C Catalyst

KW - Temperature Dependence

KW - Transfer Coefficient

UR - http://www.scopus.com/inward/record.url?scp=33748331299&partnerID=8YFLogxK

U2 - 10.1002/fuce.200600015

DO - 10.1002/fuce.200600015

M3 - Article

AN - SCOPUS:33748331299

SN - 1615-6846

VL - 6

SP - 203

EP - 207

JO - Fuel Cells

JF - Fuel Cells

IS - 3-4

ER -