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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.

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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 Item
Copyright Holders: 2009 Royal Society of Chemistry
ISSN: 1463-9076
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetEPSRC (Engineering and Physical Sciences Research Council)
Keywords: surface organometallic chemistry; palladium alloy electrocatalysts; oxygen reduction reaction; o-2 reduction; catalysts; pt(111); metals; nanoparticles; deposition; oxidation
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Life, Health and Chemical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 17922
Depositing User: Eleanor Crabb
Date Deposited: 21 Sep 2009 12:56
Last Modified: 07 Dec 2018 09:27
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