Effect of preparation conditions of Pt alloys on their electronic, structural, and electrocatalytic activities for oxygen reduction. XRD, XAS, and electrochemical studies
- Texas A&M Univ., College Station, TX (United States)
- Brookhaven National Lab., Upton, NY (United States)
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.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 81409
- Journal Information:
- Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 13 Vol. 99; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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