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Title: Surfactant-free monodispersed Pd nanoparticles template for core-shell Pd@PdPt nanoparticles as electrocatalyst towards Methanol Oxidation Reaction (MOR)
Authors: Zheng, F 
Kwong, TL 
Yung, KF 
Issue Date: 2-Jan-2022
Source: Nanomaterials, Jan. 2022, v. 12, no. 2 , 260
Abstract: 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 mAmgᴘₜ⁻¹) and excellent stability towards direct methanol oxidation compared to its monometallic counterparts.
Keywords: Core-shell
PdPt alloy
Fuel cells
Methanol oxidation
Publisher: Molecular Diversity Preservation International (MDPI)
Journal: Nanomaterials 
ISSN: 2079-4991
DOI: 10.3390/nano12020260
Rights: © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
The following publication Zheng, F.; Kwong, T.-L.; Yung, K.-F. Surfactant-Free Monodispersed Pd Nanoparticles Template for Core-Shell Pd@PdPt Nanoparticles as Electrocatalyst towards Methanol Oxidation Reaction (MOR). Nanomaterials 2022, 12, 260 is available at
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