Facile Synthesis of PtPd Network Structure Nanochains Supported on Multi-Walled Carbon Nanotubes for Methanol Oxidation

In this paper, a PtPd NC catalyst with a network structure of nanochains was prepared with KBr as a structure-directing agent, NaBH4 as a reducing agent, and modified multi-walled carbon nanotubes (MWCNTs) as a support. The experimental results show that the structure-directing agent KBr helps to fo...

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Bibliographic Details
Published in:Metals (Basel ) 2022-11, Vol.12 (11), p.1911
Main Authors: Zhang, Dawei, Ren, Yanrong, Jin, Zhenhua, Duan, Yonghua, Xu, Mingli, Yu, Jie
Format: Article
Language:English
Subjects:
Carbon
Catalysts
electrocatalysis
Electrochemical analysis
Electrodes
Fuel cell industry
Fuel cells
Methanol
Methylene blue
Morphology
Multi wall carbon nanotubes
Nanoparticles
Nanotubes
Nanowires
network structure
Network topologies
Oxidation
Oxidation-reduction reaction
Palladium
Particle size
Platinum
platinum–palladium nanochains
Polyethylene glycol
Potassium
Reducing agents
structural defects
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Summary:In this paper, a PtPd NC catalyst with a network structure of nanochains was prepared with KBr as a structure-directing agent, NaBH4 as a reducing agent, and modified multi-walled carbon nanotubes (MWCNTs) as a support. The experimental results show that the structure-directing agent KBr helps to form a particular type of nanochain with a network topology. PtPd NCs with various ratios (Pt:Pd = 2:1, 1:1, 1:2) have respective diameters of 30 nm, 35 nm, and 23 nm. With numerous structural flaws at the junctions, the nanochains’ distinctive network structure increases the number of active sites on the PtPd nanocenter surface. Electrochemical characterization results show that the current density of the PtPd NCs is about 658.5 mA mg−1, 1.5-times that of the Pt/C catalyst and 3.9-times that of the commercial Pd/C catalyst. Furthermore, it has better electrocatalytic stability for methanol oxidation than Pd/C and Pt/C catalysts.
ISSN:2075-4701
2075-4701
DOI:10.3390/met12111911