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

2009 Royal Society of Chemistry

ISSN:

1463-9076

Project Funding Details:

Funded Project Name	Project ID	Funding Body
Not Set	Not Set	EPSRC

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:

Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
eSTEeM
Biomedical Research Network (BRN)

Item ID:

17922

Depositing User:

Eleanor Crabb

Date Deposited:

21 Sep 2009 12:56

Last Modified:

07 Mar 2014 13:42