Facile preparation of rutile Ti0.7W0.3O2 with high conductivity and its effect on enhanced electrocatalytic activity of Pt as catalyst support

被引：17
|
作者：
Zheng, Longzhen [1 ]
Xiong, Leyan [1 ]
Liu, Qiang [1 ]
Xu, Jingpeng [1 ]
Kang, Xiaowei [1 ]
Wang, Yimin [1 ]
Yang, Shaoming [1 ]
Xia, Jian [1 ]
Deng, Zhaoxiang [2 ]
机构：
[1] East China Jiao Tong Univ, Dept Chem & Chem Engn, Nanchang 330013, Jiangxi, Peoples R China
[2] Univ Sci & Technol China, Dept Chem, Hefei 230026, Anhui, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2014年 / 150卷
基金：
中国国家自然科学基金;
关键词：
Non-carbon catalyst support; Rutile W-doped Titania; Oxygen reduction reaction; Electrocatalytic activity; Activation energy; DOPED TIO2; STABILITY; PLATINUM; ELECTROOXIDATION; NANOPARTICLES; NB;
D O I：
10.1016/j.electacta.2014.10.103
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Rutile Ti0.7W0.3O2 with high conductivity is prepared in a mild conditon and characterized by X-ray diffraction (XRD), scanning electron mocroscopy (SEM) and electrochemical impedance spectroscopy (EIS). Pt nanoparticles are loaded on the non-carbon catalyst support Ti0.7W0.3O2 and the electrocatalytic activity of Pt/Ti0.7W0.3O2 is evaluated by cyclic voltammetry (CV), chronoampermetry (CA) and rotating disk electrode (RDE) experiments. The Pt/Ti0.7W0.3O2 exhibits higher electrocatalytic activity of ethanol oxidation reaction (EOR) than commercial Pt/C (E-TEK) and its durability is also enhanced. The oxygen reduction reaction (ORR) activity of Pt/Ti0.7W0.3O2 is increased compared with that of Pt/C. The activation energy studies show that the dissociation adsorption of ethanol on Pt/Ti0.7W0.3O2 is as easy as that on Pt/C in kinetic-controlled process of ethanol. X-ray photoelectron spectroscopy (XPS) analysis shows that electrocatalytic activity enhancement of Pt/Ti0.7W0.3O2 is attributed to the charge transfer from Ti0.7W0.3O2 to Pt. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：197 / 204
页数：8
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