期刊
NANOMATERIALS
卷 12, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/nano12020260
关键词
core-shell; PdPt alloy; nanoparticles; electrocatalysis; fuel cells; methanol oxidation
类别
资金
- Hong Kong Research Grants Council (RGC)
- Hong Kong Polytechnic University
- University Research Facility in Chemical and Environmental Analysis (UCEA) of The Hong Kong Polytechnic University
An eco-friendly method for synthesizing Pd@PdPt/CNTs nanoparticles for methanol oxidation reaction was introduced. The method allows the synthesis of nanoparticles with a clean electrocatalytic surface, showing high activity and stability for methanol oxidation.
An eco-friendly two-step synthetic method for synthesizing Pd@PdPt/CNTs nanoparticles was introduced and studied for the methanol oxidation reaction. The Pd@PdPt alloy core-shell structure was synthesized by preparing a surfactant-free monodispersed Pd/CNTs precursor through the hydrolysis of tetrachloropalladate (II) ion ([PdCl4](2-)) in the presence of carbon nanotubes (CNTs) and the subsequent hydrogen reduction and followed by a galvanic replacement reaction. This method opens up an eco-friendly, practical, and straightforward route for synthesizing monometallic or bimetallic nanoparticles with a clean surfactant-free electrocatalytic surface. It is quite promising for large-scale preparation. The Pd@PdPt/CNTs electrocatalyst demonstrated a high specific mass activity for methanol oxidation (400.2 mAmg(Pt)(-1)) and excellent stability towards direct methanol oxidation compared to its monometallic counterparts.
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