The effect of the surface composition of Ru-Pt bimetallic catalysts for methanol oxidation

Garrick, Taylor R.; Diao, Weijian; Tengco, John M.; Stach, Eric A.; Senanayake, Sanjaya D.; Chen, Donna A.; Monnier, John R.; Weidner, John W.

doi:10.1016/j.electacta.2016.02.134

The effect of the surface composition of Ru-Pt bimetallic catalysts for methanol oxidation

Journal Article · Mon Feb 22 23:00:00 EST 2016 · Electrochimica Acta

DOI:https://doi.org/10.1016/j.electacta.2016.02.134· OSTI ID:1326766

Garrick, Taylor R. ^[1]; Diao, Weijian ^[1]; Tengco, John M. ^[1]; Stach, Eric A. ^[2]; Senanayake, Sanjaya D. ^[2]; Chen, Donna A. ^[1]; Monnier, John R. ^[1]; Weidner, John W. ^[1]

Univ. of South Carolina, Columbia, SC (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)

Here, 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.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

OSTI ID:: 1326766

Alternate ID(s):: OSTI ID: 1359039
OSTI ID: 22655263

Report Number(s):: BNL--112680-2016-JA; KC0302010

Journal Information:: Electrochimica Acta, Journal Name: Electrochimica Acta Journal Issue: C Vol. 195; ISSN 0013-4686

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
bimetallic
catalysts
electrochemical
methanol oxidation

The effect of the surface composition of Ru-Pt bimetallic catalysts for methanol oxidation

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References (19)

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