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Nano Research 2016, 9(12): 3893-3902 https://doi.org/10.1007/s12274-016-1258-8
Research Article | Issue | Published: 08 September 2016

Unexpected catalytic activity of rhodium nanodendrites with nanosheet subunits for methanol electrooxidation in an alkaline medium

Show Author's Information Yongqiang Kang1,§,  Fumin Li2,§,  Shuni Li2,  Pujun Ji1( ),  Jinhui Zeng1,  Jiaxing Jiang1,  Yu Chen1( )
Key Laboratory of Macromolecular Science of Shaanxi ProvinceSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an710062China
School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi'an710062China

§ These authors contributed equally to this work.

Keywords:
fuel cells, electrocatalysis, methanol electrooxidation, nanodendrites, rhodium
Cite this article:
Kang Y, Li F, Li S, et al. Unexpected catalytic activity of rhodium nanodendrites with nanosheet subunits for methanol electrooxidation in an alkaline medium. Nano Research, 2016, 9(12): 3893-3902. https://doi.org/10.1007/s12274-016-1258-8
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Abstract Full text Electronic supplementary material About this article

Nanocrystals of Rh, an important member of the noble metal catalyst family, have wide applications in heterogeneous catalytic reactions. Controlling the morphology of these noble metal nanocrystals has become an effective strategy for improving their catalytic activity and durability. In this work, well-defined Rh nanodendrites with very thin triangular branches as subunits are synthesized using a facile diethylene glycol reduction method, assisted by polyethyleneimine as a complex-forming agent and surfactant. For the first time, the methanol oxidation reaction (MOR) on Rh nanocrystals with a well-defined morphology is investigated using various electrochemical techniques in an alkaline medium. Unexpectedly, the as-prepared Rh nanodendrites, with ultrathin nanosheet subunits, exhibit superior electrocatalytic activity and durability during the MOR in an alkaline medium, indicating that Rh nanocrystals with specific morphology may be highly promising alternatives to Pt electrocatalysts in the MOR in an alkaline medium.


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Electronic supplementary material
About this article

Unexpected catalytic activity of rhodium nanodendrites with nanosheet subunits for methanol electrooxidation in an alkaline medium

Show Author's information Yongqiang Kang1,§, Fumin Li2,§, Shuni Li2, Pujun Ji1( ), Jinhui Zeng1, Jiaxing Jiang1, Yu Chen1( )
Key Laboratory of Macromolecular Science of Shaanxi ProvinceSchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an710062China
School of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi'an710062China

§ These authors contributed equally to this work.

Abstract

Nanocrystals of Rh, an important member of the noble metal catalyst family, have wide applications in heterogeneous catalytic reactions. Controlling the morphology of these noble metal nanocrystals has become an effective strategy for improving their catalytic activity and durability. In this work, well-defined Rh nanodendrites with very thin triangular branches as subunits are synthesized using a facile diethylene glycol reduction method, assisted by polyethyleneimine as a complex-forming agent and surfactant. For the first time, the methanol oxidation reaction (MOR) on Rh nanocrystals with a well-defined morphology is investigated using various electrochemical techniques in an alkaline medium. Unexpectedly, the as-prepared Rh nanodendrites, with ultrathin nanosheet subunits, exhibit superior electrocatalytic activity and durability during the MOR in an alkaline medium, indicating that Rh nanocrystals with specific morphology may be highly promising alternatives to Pt electrocatalysts in the MOR in an alkaline medium.

Keywords: fuel cells, electrocatalysis, methanol electrooxidation, nanodendrites, rhodium

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Publication history
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Acknowledgements

Publication history

Received: 17 June 2016
Revised: 02 August 2016
Accepted: 21 August 2016
Published: 08 September 2016
Issue date: December 2016

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016

Acknowledgements

Acknowledgements

This work was supported by National Natural Science Foundation of China (No. 21473111), Natural Science Foundation of Shaanxi Province (No. 2015JM2043), and Fundamental Research Funds for the Central Universities (Nos. GK201602002 and GK201503037).

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