Structural Effects in Electrocatalysis: Formic Acid Oxidation at Model and Real Pt Catalysts

Abstract:

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Formic acid oxidation was studied at low-index Pt single crystals (model systems) as well as at the platinum catalyst supported on high area carbon (real catalyst) in HClO4. The Pt single crystals were characterized by LEED. The LEED patterns obtained after a mild heating of flame-annealed crystals have shown clean, well ordered unreconstructured surfaces. Pt-C supported catalyst was analyzed by AFM and STM in air and by XRD. AFM and STM images revealed the presence of Pt-C agglomerates of several tenth of nm consisting of Pt particles ranged from 2 nm to 6 nm. The electrocatalytic activity of these catalysts in formic acid oxidation increased in a sequence: Pt(100) < Pt(110) < Pt-C/GC < Pt(111).

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Periodical:

Edited by:

Dragan P. Uskokovic, Slobodan K. Milonjic and Dejan I. Rakovic

Pages:

259-264

DOI:

10.4028/www.scientific.net/MSF.518.259

Citation:

J.D. Lović et al., "Structural Effects in Electrocatalysis: Formic Acid Oxidation at Model and Real Pt Catalysts", Materials Science Forum, Vol. 518, pp. 259-264, 2006

Online since:

July 2006

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$35.00

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