A novel CNT@SnO2 core-sheath nanocomposite as a stabilizing support for catalysts of proton exchange membrane fuel cells

被引：64
作者：
Du, Chunyu [1 ]
Chen, Meng [2 ]
Cao, Xianyi [1 ]
Yin, Geping [1 ]
Shi, Pengfei [1 ]
机构：
[1] Harbin Inst Technol, Sch Chem Engn & Technol, Harbin 150001, Peoples R China
[2] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Harbin 150001, Peoples R China
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2009年 / 11卷 / 02期
基金：
美国国家科学基金会;
关键词：
PEMFC; Catalyst support; Core-sheath composite; Tin dioxide; Carbon nanotube; CARBON NANOTUBE; DURABILITY; ELECTRODES;
D O I：
10.1016/j.elecom.2008.12.034
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Mesoporous SnO2 coated carbon nanotube (CNT) core-sheath nanocomposite, CNT@SnO2, was prepared by a hydrothermal method and proposed as a catalyst support for proton exchange membrane fuel cells (PEMFCs). The CNT@SnO2 and its supported Pt catalyst, Pt/(CNT@SnO2), were characterized by TEM, XRD, cyclic voltammetry, and polarization curves. The CNT@SnO2 composite showed a much lower anodic current than the CNT, especially at high potentials, indicating the CNT@SnO2 was more corrosion resistant. The Pt/(CNT@SnO2) catalyst was electrochemically active and exhibited comparable activity for the oxygen reduction reaction to the CNT supported catalyst (Pt/CNT). More importantly, the long-term stability of the Pt/(CNT@SnO2) catalyst was significantly higher than that of the Pt/CNT catalyst, which might be mainly due to the fact that the CNT@SnO2 was more corrosion resistant and mesoporous SnO2 was beneficial to restrict the Pt migration and aggregation. Consequently, the CNT@SnO2 would be a promising durable catalyst support for PEMFCs. (C) 2008 Elsevier B.V. All rights reserved
引用
收藏
页码：496 / 498
页数：3
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