Published March 20, 2016 | Version v1
Journal article Metadata-only

The Effect of the Surface Composition of Ru-Pt Bimetallic Catalysts for Methanol Oxidation

Creators

  • 1. Center for Electrochemical Engineering, Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208 (United States)
  • 2. Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11963 (United States)
  • 3. Department of Chemistry, Brookhaven National Laboratory, Upton, NY 11963 (United States)
  • 4. Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC 29208 (United States)

Description

A series of Ru-Pt bimetallic catalysts prepared by the electroless deposition of controlled and variable amounts of Ru on the Pt surface of a commercially-available 20 wt% Pt/C catalyst has been characterized and evaluated for the oxidation of methanol. The activity of each Ru-Pt catalyst was determined as a function of surface composition via cyclic voltammetry. For the Ru-Pt bimetallic catalysts, activity passed through a maximum at approximately 50% monodisperse Ru surface coverage. However, due to the monolayer coverage of Ru on Pt, the amount of metal in the catalyst is minimized compared to a bulk 1:1 atomic ratio of Ru:Pt seen in commercial bimetallic catalysts. Chemisorption and temperature programmed reduction experiments confirmed that the surface had characteristics of a true bimetallic catalyst. On a mass of Pt basis, the activity of this composition for methanol oxidation was 7 times higher than pure Pt and 3.5 times higher than a commercial catalyst with a 1:1 Pt:Ru bulk atomic ratio.

Availability note (English)

Available from http://dx.doi.org/10.1016/j.electacta.2016.02.134

Additional details

Identifiers

DOI
10.1016/j.electacta.2016.02.134;
PII
S0013-4686(16)30421-2;

Publishing Information

Journal Title
Electrochimica Acta
Journal Volume
195
Journal Page Range
p. 106-111
ISSN
0013-4686
CODEN
ELCAAV

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
49000368
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
CATALYSTS; METHANOL; OXIDATION; PLATINUM; SURFACES
Descriptors DEC
ALCOHOLS; CHEMICAL REACTIONS; ELEMENTS; HYDROXY COMPOUNDS; METALS; ORGANIC COMPOUNDS; PLATINUM METALS; TRANSITION ELEMENTS

Optional Information

Copyright
Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.