Solvothermal synthesis of Pt -SiO2/graphene nanocomposites as efficient electrocatalyst for methanol oxidation

被引：48
作者：
Thu Ha Thi Vu [1 ]
Thanh Thuy Thi Tran [1 ]
Hong Ngan Thi Le [1 ]
Lien Thi Tran [1 ]
Phuong Hoa Thi Nguyen [1 ]
Hung Tran Nguyen [2 ]
Ngoc Quynh Bui [3 ]
机构：
[1] Key Lab Petrochem & Refinery Technol, Hanoi, Vietnam
[2] Inst Chem & Mat Sci, Hanoi, Vietnam
[3] Inst Rech Catalyse & Environm Lyon, UMR5256, F-69626 Villeurbanne, France
来源：
ELECTROCHIMICA ACTA | 2015年 / 161卷
关键词：
Solvothermal synthesis; Silica; Platinum-based nanocomposite; Reduced graphene oxide; Methanol oxidation; REDUCED GRAPHENE OXIDE; ONE-POT SYNTHESIS; ELECTROCHEMICAL PERFORMANCE; METAL NANOPARTICLES; PT-M/C; DMFC; ELECTROOXIDATION; NANOSHEETS; REDUCTION; COMPOSITE;
D O I：
10.1016/j.electacta.2015.02.100
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
In this work, Pt-SiO2/graphene nanocomposites have been synthesized under solvothermal conditions and investigated as electrocatalysts for methanol oxidation. Structure and morphology of these catalysts are characterized by transmission electron microscopy, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy and nitrogen adsorption/desorption studies. The Pt and SiO2 contents of these nanocomposites are determined by inductively coupled plasma optical emission spectrometry (ICP-OES). Their electrocatalytic properties are investigated by cyclic voltammetry, chronoamperometry, chronopotentiometry and electrochemical impendence spectroscopy. The as-prepared nanocomposites show the improved catalytic performance, better stability and good antiposoining ability compared with Pt supported on graphene catalyst. Particularly, the catalyst containing 9.24% of SiO2 exhibits the best electrocatalytic performance for methanol oxidation with mass activity of 1047 mA mg (1). (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：335 / 342
页数：8
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