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

页码：496 / 498

页数：3