Low-cost and durable catalyst support for fuel cells: Graphite submicronparticles
2009; Elsevier BV; Volume: 195; Issue: 2 Linguagem: Inglês
10.1016/j.jpowsour.2009.08.012
ISSN1873-2755
AutoresSheng Zhang, Yuyan Shao, Xiaohong Li, Zimin Nie, Yong Wang, Bin Li, Geping Yin, Yuehe Lin,
Tópico(s)Advancements in Battery Materials
ResumoLow-cost graphite submicronparticles (GSP) are employed as a possible catalyst support for polymer electrolyte membrane (PEM) fuel cells. Platinum nanoparticles are deposited on Vulcan XC-72 carbon black (XC-72), carbon nanotubes (CNT), and GSP via ethylene glycol (EG) reduction method. The morphologies and the crystallinity of Pt/XC-72, Pt/CNT, and Pt/GSP are characterized with X-ray diffraction and transmission electron microscope, which shows that Pt nanoparticles (∼3.5 nm) are uniformly dispersed on supports. Pt/GSP exhibits the highest activity towards oxygen-reduction reactions. The durability study indicates that Pt/GSP is 2–3 times durable than Pt/CNT and Pt/XC-72. The enhanced durability of Pt/GSP catalyst is attributed to the higher corrosion resistance of graphite submicronparticles, which results from higher graphitization degree of GSP support. Considering its low production cost, graphite submicronparticles are promising electrocatalyst support for fuel cells.
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