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Title: Surface engineering of hierarchical platinum-cobalt nanowires for efficient electrocatalysis

Abstract

Despite intense research in past decades, the lack of high-performance catalysts for fuel cell reactions remains a challenge in realizing fuel cell technologies for transportation applications. Here we report a facile strategy for synthesizing hierarchical platinum-cobalt nanowires with high-index, platinum-rich facets and ordered intermetallic structure. These structural features enable unprecedented performance for the oxygen reduction and alcohol oxidation reactions. The specific/mass activities of the platinum-cobalt nanowires for oxygen reduction reaction are 39.6/33.7 times higher than commercial Pt/C catalyst, respectively. Density functional theory simulations reveal that the active threefold hollow sites on the platinum-rich high-index facets provide an additional factor in enhancing oxygen reduction reaction activities. The nanowires are stable in the electrochemical conditions and also thermally stable. Furthermore, this work may represent a key step towards scalable production of high performance platinum-based nanowires for applications in catalysis and energy conversion.

Authors:
 [1];  [2];  [3];  [4];  [4];  [3];  [1];  [1];  [1];  [1]
  1. Soochow Univ., Jiangsu (China)
  2. Peking Univ., Beijing (China)
  3. California State Univ. (CalState), Northridge, CA (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven Science Associates, LLC, Upton, NY (United States); Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1307420
Alternate Identifier(s):
OSTI ID: 1336135
Report Number(s):
BNL-112606-2016-JA
Journal ID: ISSN 2041-1723; ncomms11850
Grant/Contract Number:  
SC0012704; SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 7; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Hierarchical Nanowires; STEM; Electrocatalysts; Center for Functional Nanomaterials

Citation Formats

Bu, Lingzheng, Guo, Shaojun, Zhang, Xu, Shen, Xuan, Su, Dong, Lu, Gang, Zhu, Xing, Yao, Jianlin, Guo, Jun, and Huang, Xiaoqing. Surface engineering of hierarchical platinum-cobalt nanowires for efficient electrocatalysis. United States: N. p., 2016. Web. doi:10.1038/ncomms11850.
Bu, Lingzheng, Guo, Shaojun, Zhang, Xu, Shen, Xuan, Su, Dong, Lu, Gang, Zhu, Xing, Yao, Jianlin, Guo, Jun, & Huang, Xiaoqing. Surface engineering of hierarchical platinum-cobalt nanowires for efficient electrocatalysis. United States. doi:10.1038/ncomms11850.
Bu, Lingzheng, Guo, Shaojun, Zhang, Xu, Shen, Xuan, Su, Dong, Lu, Gang, Zhu, Xing, Yao, Jianlin, Guo, Jun, and Huang, Xiaoqing. Wed . "Surface engineering of hierarchical platinum-cobalt nanowires for efficient electrocatalysis". United States. doi:10.1038/ncomms11850. https://www.osti.gov/servlets/purl/1307420.
@article{osti_1307420,
title = {Surface engineering of hierarchical platinum-cobalt nanowires for efficient electrocatalysis},
author = {Bu, Lingzheng and Guo, Shaojun and Zhang, Xu and Shen, Xuan and Su, Dong and Lu, Gang and Zhu, Xing and Yao, Jianlin and Guo, Jun and Huang, Xiaoqing},
abstractNote = {Despite intense research in past decades, the lack of high-performance catalysts for fuel cell reactions remains a challenge in realizing fuel cell technologies for transportation applications. Here we report a facile strategy for synthesizing hierarchical platinum-cobalt nanowires with high-index, platinum-rich facets and ordered intermetallic structure. These structural features enable unprecedented performance for the oxygen reduction and alcohol oxidation reactions. The specific/mass activities of the platinum-cobalt nanowires for oxygen reduction reaction are 39.6/33.7 times higher than commercial Pt/C catalyst, respectively. Density functional theory simulations reveal that the active threefold hollow sites on the platinum-rich high-index facets provide an additional factor in enhancing oxygen reduction reaction activities. The nanowires are stable in the electrochemical conditions and also thermally stable. Furthermore, this work may represent a key step towards scalable production of high performance platinum-based nanowires for applications in catalysis and energy conversion.},
doi = {10.1038/ncomms11850},
journal = {Nature Communications},
number = ,
volume = 7,
place = {United States},
year = {2016},
month = {6}
}

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