Fabrication of bridge like Pt@MWCNTs/CoS2 electrocatalyst on conductive polymer matrix for electrochemical hydrogen evolution

被引：39
作者：
Ashassi-Sorkhabi, Habib [1 ]
Rezaei-Moghadam, Babak [1 ]
Asghari, Elnaz [1 ]
Bagheri, Robabeh [1 ]
Hosseinpour, Zahra [2 ]
机构：
[1] Univ Tabriz, Electrochem Res Lab, Fac Chem, Dept Phys Chem, Tabriz 5166616471, Iran
[2] Univ Tabriz, Fac Chem, Dept Inorgan Chem, Tabriz, Iran
来源：
CHEMICAL ENGINEERING JOURNAL | 2017年 / 308卷
关键词：
Hydrogen evolution reaction (HER); PPy; CoS2; MWCNTs; Impedance; AMORPHOUS MOLYBDENUM SULFIDE; CARBON NANOTUBES; STABLE ELECTROCATALYST; EFFICIENT CATALYST; NANOWIRES ARRAY; NANOPARTICLES; GRAPHENE; ELECTRODE; METAL; POLYPYRROLE;
D O I：
10.1016/j.cej.2016.09.072
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The present article reports the synthesis of nanocomposites of polypyrrole along with non-precious metal chalcogenide, cobalt-disulfide. A simple sonoelectrochemical method was carried out in order to fabricate novel composite electrode materials composing polypyrrole, CoS2 and decorated Pt nanoparticles on multi walled carbon nanotubes, MWCNTs. Studying on electrocatalytic activity revealed that the presence of CoS2 nanoparticles along with MWCNTs and Pt nanoparticles played a prominent role in enhancement of proton reduction to hydrogen gas. The possible mechanism of electrocatalytic activity by nanocomposite films is also discussed. The PPy(CoS2)MWCNTsPt nanocomposite film exhibits extremely low overpotential (0.03 V vs. RHE), and high current density for HER in acidic solution. The activity enhancement can be attributed to the large active electrochemical surface area of MWCNTs and also porous structure of PPy provides excellent attachment of CoS2 and Pt nanostructures to the matrix. In addition, the HER is further improved due to stronger adsorption of hydrogen to the disulfide anions in CoS2 structures. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：275 / 288
页数：14
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