An XPS study on binary and ternary alloys of transition metals with platinized carbon and its bearing upon oxygen electroreduction in direct methanolfuel cells

Authors
Shukla, AK Neergat, M Bera, P Jayaram, V Hegde, MS
Citation
Ak. Shukla et al., An XPS study on binary and ternary alloys of transition metals with platinized carbon and its bearing upon oxygen electroreduction in direct methanolfuel cells, J ELEC CHEM, 504(1), 2001, pp. 111-119
Citations number
46
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
ISSN journal
15726657 → ACNP
Volume
504
Issue
1
Year of publication
2001
Pages
111 - 119
Database
ISI
SICI code
Abstract
The present X-ray photoelectron spectroscopic study on carbon-supported Pt, Pt-Cr, Pt-Co, Pt-Ni, Pt-Co-Cr and Pt-Co-Ni electrocatalysts suggests that while Pt-Cr/C, Pt-Co/C and Pt-Ni/C binary alloy electrocatalysts are surfac e rich in platinum, both Pt-Co-Cr/C and Pt-Co-Ni/C ternary electrocatalysts happen to be surface rich in base metals. Among these electrocatalysts, Pt -Co/C electrocatalyst is found to possess a minimum amount of platinum oxid es. Accordingly, Pt-Co/C exhibits a higher electrocatalytic activity toward s oxygen-reduction reaction in the solid-polymer-electrolyte direct methano l fuel cells. (C) 2001 Elsevier Science B.V. All rights reserved.