Electrodeposition of three-dimensional Pd nanoflowers on a PPy@MWCNTs with superior electrocatalytic activity for methanol electrooxidation

被引：46
作者：
Fard, Leyla Abolghasemi [1 ]
Ojani, Reza [1 ]
Raoof, Jahan Bakhsh [1 ]
机构：
[1] Univ Mazandaran, Dept Analyt Chem, Electroanalyt Chem Res Lab, Fac Chem, 3rd Kilometer Air Force Rd, Babol Sar 4741695447, Iran
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2016年 / 41卷 / 40期
关键词：
Palladium nanoflowers; Polypyrrole@multi-walled carbon nanotubes; Catalysis; Electrooxidation; Methanol; FORMIC-ACID; CARBON NANOTUBES; FACILE SYNTHESIS; PALLADIUM NANOPARTICLES; CATALYTIC-ACTIVITY; FLOWER-LIKE; PERFORMANCE; PLATINUM; OXIDATION; NANOSTRUCTURES;
D O I：
10.1016/j.ijhydene.2016.08.010
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper, polypyrrole@multi-walled carbon nanotubes (PPy@MWCNTs) nanocomposite as a catalyst support material is fabricated. Pd nanoflowers (NFs) were deposited on a PPy@MWCNTs modified glassy carbon electrode (GCE) by a facile electrochemical approach. The morphology and composition of the Pd NFs/PPy@MWCNTs are characterized by SEM (scanning electron microscopy) and EDS (energy dispersive spectroscopy), respectively. The catalytic performance of Pd NFs/PPY@MWCNTs catalyst is examined by cyclic voltammetry, chronoamperometry and electrochemical impedance spectroscopy toward methanol oxidation reaction (MOR) in alkaline media. The mass activity of Pd NFs/PPY@MWCNTs (725 mA mg(-1)) is 8.09 times higher than that of the Pd NFs catalyst (89.6 mA mg(-1)). Meanwhile, the ratio of forward current (j(f)) to reverse current (j(b)) for the polymer supported catalyst is almost 2.6 times higher than that of the Pd NFs. Furthermore, PPY@MWCNTs produces a high activity to electrocatalyst, which might be due to higher electrochemically surface area and electronic conductivity. This strategy provides a promising platform for direct methanol fuel cells. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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页码：17987 / 17994
页数：8
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