Core-shell structural nanodiamond@TiN supported Pt nanoparticles as a highly efficient and stable electrocatalyst for direct methanol fuel cells

被引：21
|
作者：
Zhao, Yuling [1 ]
Wang, Yanhui [1 ]
Dong, Liang [1 ]
Zhang, Yan [1 ]
Huang, Junjie [1 ]
Zang, Jianbing [1 ]
Lu, Jing [2 ]
Xu, Xipeng [2 ]
机构：
[1] Yanshan Univ, Coll Mat Sci & Engn, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao, Hebei, Peoples R China
[2] Huaqiao Univ, MOE Engn Res Ctr Brittle Mat Machining, Xiamen 361021, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2014年 / 148卷
基金：
中国国家自然科学基金;
关键词：
Nanodiamond; TiN; Electrocatalyst; Activity; Stability; CATALYST SUPPORT; TUNGSTEN CARBIDE; REDUCTION; OXIDATION; PLATINUM; PERFORMANCE; DURABILITY; MEMBRANES; HYBRID; POWDER;
D O I：
10.1016/j.electacta.2014.10.024
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A novel core-shell support material was designed with nanodiamond (ND) as core possessed excellent stability and TiN as shell improved the conductivity of support. The nano-TiN shell was decorated on the surface of ND by annealing TiO2 in nitrogen atmosphere, and the obtained ND@TiN was employed to support Pt nanoparticles (NPs). The ND@TiN support and Pt/ND@TiN electrocatalyst were characterized by X-ray diffraction and transmission electron microscopy. ND particles were coated uniformly by the TiN layer and Pt NPs with a mean size of 4.2 nm were highly dispersed on the surface of ND@TiN. The electrochemical results confirmed that the ND@TiN support possessed a much more stability than the carbon black and exhibited a bigger background current density than the ND. The Pt/ND@TiN catalyst showed higher catalytic activity and better stability in methanol oxidation and oxygen reduction reactions compared with the Pt/C and Pt/ND. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：8 / 14
页数：7
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