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Nano Research 2019, 12(7): 1721-1726 https://doi.org/10.1007/s12274-019-2428-2
Research Article | Issue | Published: 10 May 2019

One-nanometer-thick platinum-based nanowires with controllable surface structures

Show Author's Information Xiaokun Fan1,2,  Shuiping Luo1,  Xixia Zhao1,  Xiaotong Wu1,2,  Zhishan Luo1,  Min Tang1,  Wen Chen1,  Xing Song1,  Zewei Quan1( )
Department of Chemistry,Southern University of Science and Technology(SUSTech),Shenzhen,518055,China;
School of Chemical Biology and Biotechnology,Shenzhen Graduate School, Peking University,Shenzhen,518055,China;
Keywords:
oxygen reduction reaction, platinum, ultrathin nanowire, surface structure, electrtocatalyst
Topics:
CatalystsCoordination reactionsElectrolytic reduction Fuel cellsNanowiresPlatinumPlatinum alloysSurface structure
Cite this article:
Fan X, Luo S, Zhao X, et al. One-nanometer-thick platinum-based nanowires with controllable surface structures. Nano Research, 2019, 12(7): 1721-1726. https://doi.org/10.1007/s12274-019-2428-2
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Abstract Full text Electronic supplementary material About this article

Pt-based ultrathin nanowires (NWs) are considered as one of the most intriguing catalysts for fuel cells. However, the delicate controllability of surface structure of ultrathin NWs to regulate their catalytic performances is still a challenge. Here, two kinds of one-nanometer-thick Pt-based NWs with smooth surfaces (S-NWs) and rough surfaces (R-NWs) are demonstrated, in which the combined use of hexadecyltrimethylammonium bromide and oleylamine plays an essential role, as they could form soft-templates to direct the growth of NWs. Due to its high-density of low-coordinated sites on the surface, Pt-based R-NWs exhibit higher oxygen reduction reaction (ORR) activities but lower stabilities than corresponding S-NWs. Notably, Pt0.78Ni0.22 R-NWs possess the highest mass activity (1.07 AdmgPt−1) and specific activity (1.02 mAdcm−2) among all Pt-based NWs. After 10, 000 sweeping cycles, the mass activity still exhibits 5.7-fold enhancement compared to the corresponding commercial Pt/C. This work presents a new approach to delicately control the surface structure of ultrathin Pt-based NWs as advanced ORR catalysts.


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Electronic supplementary material
About this article

One-nanometer-thick platinum-based nanowires with controllable surface structures

Show Author's information Xiaokun Fan1,2, Shuiping Luo1, Xixia Zhao1, Xiaotong Wu1,2, Zhishan Luo1, Min Tang1, Wen Chen1, Xing Song1, Zewei Quan1( )
Department of Chemistry,Southern University of Science and Technology(SUSTech),Shenzhen,518055,China;
School of Chemical Biology and Biotechnology,Shenzhen Graduate School, Peking University,Shenzhen,518055,China;

Abstract

Pt-based ultrathin nanowires (NWs) are considered as one of the most intriguing catalysts for fuel cells. However, the delicate controllability of surface structure of ultrathin NWs to regulate their catalytic performances is still a challenge. Here, two kinds of one-nanometer-thick Pt-based NWs with smooth surfaces (S-NWs) and rough surfaces (R-NWs) are demonstrated, in which the combined use of hexadecyltrimethylammonium bromide and oleylamine plays an essential role, as they could form soft-templates to direct the growth of NWs. Due to its high-density of low-coordinated sites on the surface, Pt-based R-NWs exhibit higher oxygen reduction reaction (ORR) activities but lower stabilities than corresponding S-NWs. Notably, Pt0.78Ni0.22 R-NWs possess the highest mass activity (1.07 AdmgPt−1) and specific activity (1.02 mAdcm−2) among all Pt-based NWs. After 10, 000 sweeping cycles, the mass activity still exhibits 5.7-fold enhancement compared to the corresponding commercial Pt/C. This work presents a new approach to delicately control the surface structure of ultrathin Pt-based NWs as advanced ORR catalysts.

Keywords: oxygen reduction reaction, platinum, ultrathin nanowire, surface structure, electrtocatalyst

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Publication history
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Acknowledgements

Publication history

Received: 23 February 2019
Revised: 22 March 2019
Accepted: 29 April 2019
Published: 10 May 2019
Issue date: July 2019

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (NSFC) (No. 51772142), Shenzhen Science and Technology Innovation Committee (Nos. KQJSCX20170328155428476 and KQTD2016053019134356), Development and Reform Commission of Shenzhen Municipality (Novel Nanomaterial Discipline Construction Plan), and the China Postdoctoral Science Foundation (No. 2018M641633).

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