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Preparation, structure and stability of Pt and Pd monolayer modified Pd and Pt electrocatalysts

Wells, P. P.; Crabb, E. M.; King, C. R.; Wiltshire, R.; Bilsborrow, B.; Thompsett, D. and Russell, A. E. (2009). Preparation, structure and stability of Pt and Pd monolayer modified Pd and Pt electrocatalysts. Physical Chemistry Chemical Physics, 11(27) pp. 5773–5781.

DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1039/b823504j
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Abstract

A controlled surface reaction technique has been successfully employed to prepare a series of Pt modified Pd/C (Pt/Pd/C) and Pd modified Pt/C (Pd/Pt/C) catalysts. The resulting catalyst materials were characterised by TEM, XRD, electrochemistry, and EXAFS techniques. In the case of the Pd/Pt/C carbon catalysts, core-shell structural arrangements were found, with a 0.04 angstrom contraction of the Pd-Pd bond distance for the 1 Pd/Pt/C being observed. A greater degree of alloying was found for the Pt/Pd/C catalysts where the surface had a mixed composition with a large proportion of the Pt in the interior of the nanoparticle. However, strong Pt characteristics were exhibited in the voltammetry of Pt/Pd/C catalysts, most notably a large increase in the stability with respect to the electrochemical environment compared to Pd alone.

Item Type: Journal Article
Copyright Holders: 2009 Royal Society of Chemistry
ISSN: 1463-9076
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetEPSRC
Keywords: surface organometallic chemistry; palladium alloy electrocatalysts; oxygen reduction reaction; o-2 reduction; catalysts; pt(111); metals; nanoparticles; deposition; oxidation
Academic Unit/Department: Science > Life, Health and Chemical Sciences
Interdisciplinary Research Centre: Biomedical Research Network (BRN)
Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 17922
Depositing User: Eleanor Crabb
Date Deposited: 21 Sep 2009 12:56
Last Modified: 24 Nov 2014 11:31
URI: http://oro.open.ac.uk/id/eprint/17922
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