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

Abstract

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.

Authors:
 [1];  [1];  [1];  [2];  [2];  [1];  [1];  [1]
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  1. Univ. of South Carolina, Columbia, SC (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1326766
Alternate Identifier(s):
OSTI ID: 1359039
Report Number(s):
BNL-112680-2016-JA
Journal ID: ISSN 0013-4686; R&D Project: CO009; KC0302010
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Electrochimica Acta
Additional Journal Information:
Journal Volume: 195; Journal Issue: C; Journal ID: ISSN 0013-4686
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; electrochemical; catalysts; bimetallic; methanol oxidation

Citation Formats

Garrick, Taylor R., Diao, Weijian, Tengco, John M., Stach, Eric A., Senanayake, Sanjaya D., Chen, Donna A., Monnier, John R., and Weidner, John W. The effect of the surface composition of Ru-Pt bimetallic catalysts for methanol oxidation. United States: N. p., 2016. Web. doi:10.1016/j.electacta.2016.02.134.
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Garrick, Taylor R., Diao, Weijian, Tengco, John M., Stach, Eric A., Senanayake, Sanjaya D., Chen, Donna A., Monnier, John R., & Weidner, John W. The effect of the surface composition of Ru-Pt bimetallic catalysts for methanol oxidation. United States. https://doi.org/10.1016/j.electacta.2016.02.134
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Garrick, Taylor R., Diao, Weijian, Tengco, John M., Stach, Eric A., Senanayake, Sanjaya D., Chen, Donna A., Monnier, John R., and Weidner, John W. Tue . "The effect of the surface composition of Ru-Pt bimetallic catalysts for methanol oxidation". United States. https://doi.org/10.1016/j.electacta.2016.02.134. https://www.osti.gov/servlets/purl/1326766.
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@article{osti_1326766,
title = {The effect of the surface composition of Ru-Pt bimetallic catalysts for methanol oxidation},
author = {Garrick, Taylor R. and Diao, Weijian and Tengco, John M. and Stach, Eric A. and Senanayake, Sanjaya D. and Chen, Donna A. and Monnier, John R. and Weidner, John W.},
abstractNote = {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.},
doi = {10.1016/j.electacta.2016.02.134},
journal = {Electrochimica Acta},
number = C,
volume = 195,
place = {United States},
year = {Tue Feb 23 00:00:00 EST 2016},
month = {Tue Feb 23 00:00:00 EST 2016}
}
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https://doi.org/10.1016/j.electacta.2016.02.134
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