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Title: Platinum-ruthenium nanotubes and platinum-ruthenium coated copper nanowires as efficient catalysts for electro-oxidation of methanol

Abstract

The sluggish kinetics of methanol oxidation reaction (MOR) is a major barrier to the commercialization of direct methanol fuel cells (DMFCs). In this study, we report a facile synthesis of platinum–ruthenium nanotubes (PtRuNTs) and platinum–ruthenium-coated copper nanowires (PtRu/CuNWs) by galvanic displacement reaction using copper nanowires as a template. The PtRu compositional effect on MOR is investigated; the optimum Pt/Ru bulk atomic ratio is about 4 and surface atomic ratio about 1 for both PtRuNTs and PtRu/CuNWs. Enhanced specific MOR activities are observed on both PtRuNTs and PtRu/CuNWs compared with the benchmark commercial carbon-supported PtRu catalyst (PtRu/C, Hispec 12100). Finally, x-ray photoelectron spectroscopy (XPS) reveals a larger extent of electron transfer from Ru to Pt on PtRu/CuNWs, which may lead to a modification of the d-band center of Pt and consequently a weaker bonding of CO (the poisoning intermediate) on Pt and a higher MOR activity on PtRu/CuNWs.

Authors:
 [1];  [2];  [1];  [1];  [1];  [3];  [4];  [1]
  1. Univ. of Delaware, Newark, DE (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of Delaware, Newark, DE (United States) ; Columbia Univ., New York, NY (United States)
  4. Columbia Univ., New York, NY (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1265286
Grant/Contract Number:
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
ACS Catalysis
Additional Journal Information:
Journal Volume: 5; Journal Issue: 3; Journal ID: ISSN 2155-5435
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 30 DIRECT ENERGY CONVERSION; electrocatalysis; methanol fuel cells; methanol oxidation reaction; one-dimensional structure; platinum−ruthenium

Citation Formats

Zheng, Jie, Cullen, David A., Forest, Robert V., Wittkopf, Jarrid A., Zhuang, Zhongbin, Zheng, Whenchao, Chen, Jingguang G., and Yan, Yushan. Platinum-ruthenium nanotubes and platinum-ruthenium coated copper nanowires as efficient catalysts for electro-oxidation of methanol. United States: N. p., 2015. Web. doi:10.1021/cs501449y.
Zheng, Jie, Cullen, David A., Forest, Robert V., Wittkopf, Jarrid A., Zhuang, Zhongbin, Zheng, Whenchao, Chen, Jingguang G., & Yan, Yushan. Platinum-ruthenium nanotubes and platinum-ruthenium coated copper nanowires as efficient catalysts for electro-oxidation of methanol. United States. doi:10.1021/cs501449y.
Zheng, Jie, Cullen, David A., Forest, Robert V., Wittkopf, Jarrid A., Zhuang, Zhongbin, Zheng, Whenchao, Chen, Jingguang G., and Yan, Yushan. Thu . "Platinum-ruthenium nanotubes and platinum-ruthenium coated copper nanowires as efficient catalysts for electro-oxidation of methanol". United States. doi:10.1021/cs501449y. https://www.osti.gov/servlets/purl/1265286.
@article{osti_1265286,
title = {Platinum-ruthenium nanotubes and platinum-ruthenium coated copper nanowires as efficient catalysts for electro-oxidation of methanol},
author = {Zheng, Jie and Cullen, David A. and Forest, Robert V. and Wittkopf, Jarrid A. and Zhuang, Zhongbin and Zheng, Whenchao and Chen, Jingguang G. and Yan, Yushan},
abstractNote = {The sluggish kinetics of methanol oxidation reaction (MOR) is a major barrier to the commercialization of direct methanol fuel cells (DMFCs). In this study, we report a facile synthesis of platinum–ruthenium nanotubes (PtRuNTs) and platinum–ruthenium-coated copper nanowires (PtRu/CuNWs) by galvanic displacement reaction using copper nanowires as a template. The PtRu compositional effect on MOR is investigated; the optimum Pt/Ru bulk atomic ratio is about 4 and surface atomic ratio about 1 for both PtRuNTs and PtRu/CuNWs. Enhanced specific MOR activities are observed on both PtRuNTs and PtRu/CuNWs compared with the benchmark commercial carbon-supported PtRu catalyst (PtRu/C, Hispec 12100). Finally, x-ray photoelectron spectroscopy (XPS) reveals a larger extent of electron transfer from Ru to Pt on PtRu/CuNWs, which may lead to a modification of the d-band center of Pt and consequently a weaker bonding of CO (the poisoning intermediate) on Pt and a higher MOR activity on PtRu/CuNWs.},
doi = {10.1021/cs501449y},
journal = {ACS Catalysis},
number = 3,
volume = 5,
place = {United States},
year = {Thu Jan 15 00:00:00 EST 2015},
month = {Thu Jan 15 00:00:00 EST 2015}
}

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Cited by: 37 works
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