A novel CNT@SnO(2) core-sheath nanocomposite as a stabilizing support for catalysts of proton exchange membrane fuel cells

作者：Du Chunyu^*; Chen Meng; Cao Xianyi; Yin Geping; Shi Pengfei

来源：Electrochemistry Communications, 2009, 11(2): 496-498.

DOI：10.1016/j.elecom.2008.12.034

• PEMFC
• Catalyst support
• Core-sheath composite
• Tin dioxide
• Carbon nanotube

Mesoporous SnO(2) coated carbon nanotube (CNT) core-sheath nanocomposite, CNT@SnO(2), was prepared by a hydrothermal method and proposed as a catalyst support for proton exchange membrane fuel cells (PEMFCs). The CNT@SnO(2) and its supported Pt catalyst, Pt/(CNT@SnO(2)), were characterized by TEM, XRD, cyclic voltammetry, and polarization curves. The CNT@SnO(2) composite showed a much lower anodic current than the CNT, especially at high potentials, indicating the CNT@SnO(2) was more corrosion resistant. The Pt/(CNT@SnO(2)) 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@SnO(2)) 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 SnO(2) was beneficial to restrict the Pt migration and aggregation. Consequently, the CNT@SnO(2) would be a promising durable catalyst support for PEMFCs.

• 出版日期2009-2
• 单位哈尔滨工程大学; 哈尔滨工业大学