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WC@meso-Pt core-shell nanostructures for fuel cells.

Zhao-Yang Chen1, Chun-An Ma, You-Qun Chu

  • 1State Key Laboratory Breeding Base for Green Chemistry Synthesis Technology, International Sci. & Tech. Cooperation Base of Energy Materials and Application, College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, PR China. science@zjut.edu.cn.

Chemical Communications (Cambridge, England)
|November 6, 2013
PubMed
Summary
This summary is machine-generated.

We synthesized novel core-shell tungsten carbide@mesoporous platinum (WC@meso-Pt) nanocatalysts. These catalysts show enhanced performance for methanol electrooxidation compared to commercial platinum on carbon.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Nanotechnology

Background:

  • Developing efficient electrocatalysts is crucial for fuel cell technology.
  • Platinum-based catalysts are widely used but expensive and prone to deactivation.
  • Methanol electrooxidation requires highly active and stable catalytic materials.

Purpose of the Study:

  • To develop a facile synthesis method for core-shell WC@meso-Pt nanocatalysts.
  • To evaluate the electrocatalytic activity and stability of the synthesized nanocatalysts for methanol oxidation.
  • To compare the performance against commercial platinum on carbon (Pt/C) catalysts.

Main Methods:

  • Gas-solid reactions involving ammonium tungstate and copper nitrate carburization.
  • Platinum replacement reaction to form the core-shell structure.
  • Electrochemical testing for methanol electrooxidation activity and stability.

Main Results:

  • Successfully synthesized core-shell WC@meso-Pt nanocatalysts with a mesoporous structure.
  • The WC@meso-Pt nanocatalysts exhibited significantly higher activity for methanol electrooxidation.
  • Enhanced stability was observed compared to commercial Pt/C catalysts.

Conclusions:

  • The facile synthesis method yields highly active and stable WC@meso-Pt nanocatalysts.
  • These core-shell nanocatalysts represent a promising alternative to commercial catalysts for methanol electrooxidation.
  • The mesoporous structure and WC core contribute to improved catalytic performance.