Effect of Preparation Conditions of Pt Alloys on Their Electronic, Structural, and Electrocatalytic Activities for Oxygen Reduction - XRD, XAS, and Electrochemical Studies | Zendy

Sanjeev Mukerjee | Zendy; Supramaniam Srinivasan | Zendy; Manuel P. Soriaga | Zendy; J. McBreen | Zendy

Open Access

Effect of Preparation Conditions of Pt Alloys on Their Electronic, Structural, and Electrocatalytic Activities for Oxygen Reduction - XRD, XAS, and Electrochemical Studies

Author(s) -

Sanjeev Mukerjee,

Supramaniam Srinivasan,

Manuel P. Soriaga,

J. McBreen

Publication year - 1995

Publication title -

the journal of physical chemistry

Language(s) - English

Resource type - Journals

eISSN - 1541-5740

pISSN - 0022-3654

DOI - 10.1021/j100013a032

Subject(s) - oxygen reduction , citation , electrochemistry , computer science , x ray absorption spectroscopy , nanotechnology , materials science , chemistry , physics , library science , optics , electrode , absorption spectroscopy

The effect of different alloying conditions (alloying temperature, annealing period) on the electrocatalytic activities for the oxygen reduction reaction (ORR) by three carbon-supported Pt alloy electrocatalysts (Pt/Cr, Pt/Co, Pt/Ni) was investigated and correlated with electronic and structural parameters determined by in-situ XAS. The results indicate that all the Pt alloys show enhanced ORR activities relative to a Pt/C electrocatalyst. The observations indicate that the dependence of electrocatalytic activities and activation energy for Pt/Co and Pt/Ni alloys on the thermal history and the absence of such an effect in the Pt/Cr alloy could be related to the differences in the Pt 5d-orbital vacancies. 52 refs., 12 figs., 5 tabs.

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