SnO2-embedded worm-like carbon nanofibers supported Pt nanoparticles for oxygen reduction reaction

被引：27
作者：
Jia, Jingchun [1 ,2 ,3 ]
Wang, Hui [1 ]
Ji, Shan [4 ]
Yang, Huijuan [1 ]
Li, Xusheng [1 ]
Wang, Rongfang [1 ]
机构：
[1] Northwest Normal Univ, Coll Chem & Chem Engn, Lanzhou 730070, Peoples R China
[2] Xiamen Univ, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
[3] Xiamen Univ, Dept Chem, Xiamen 361005, Peoples R China
[4] Univ Western Cape, South African Inst Adv Mat Chem, ZA-7535 Cape Town, South Africa
来源：
ELECTROCHIMICA ACTA | 2014年 / 141卷
基金：
中国国家自然科学基金;
关键词：
Tin dioxide nanoparticle; Nitrogen-doped carbon nanofiber; The support; Platinum catalysts; Oxygen reduction reaction; NITROGEN-DOPED CARBON; MEMBRANE FUEL-CELLS; ROOM-TEMPERATURE SYNTHESIS; METHANOL OXIDATION; CATALYTIC-ACTIVITY; ELECTROCATALYTIC ACTIVITY; PLATINUM NANOPARTICLES; RAMAN-SPECTROSCOPY; MESOPOROUS CARBON; ENHANCED ACTIVITY;
D O I：
10.1016/j.electacta.2014.07.020
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
We report SnO2-embedded worm-like carbon nitride nanofibers (SnO2-CNx) as support for Pt nanoparticles, which show a significant enhancement in catalytic activity for the oxygen reduction reaction (ORR). Transmission electron microscopy (TEM) results show that Pt nanoparticles are uniformly distributed on the surface of SnO2-CNx. A strong interaction between metal nanoparticles and support in Pt/SnO2-CNx was confirmed by X-ray photoelectron spectroscopy, which could change the electronic structure of Pt atoms. The synthesized Pt/SnO2-CNx. exhibits superior catalytic activity and stability in ORR. The activity of commercial Pt/C lost about 16.9% and Pt/C-CNx 11.8% after 5000 electrochemical cycles. In contract, the Pt/SnO2-CNx only lost less than 5% in ORR activity. The significantly improved activity and stability of Pt/SnO2-CNx are resulted from the modification of Pt electronic structure and strong interactions between Pt nanopartiles and SnO2-CNx. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：13 / 19
页数：7
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