Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
Volume 621, Issue 2, Pages 198-204Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2007.09.037
Keywords
Fuel cell; Electrocatalyst; Oxygen reduction; Silica; Nanocomposite catalysts; Oxide-metal nanoparticles
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Funding
- US Army CECOM RDEC [DAA1307-03-3-K414]
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Colloidal silica has been employed as a support material to disperse Pt and develop Pt-SiO2 composites with electrocatalytic properties. The Pt-SiO2 particles of ratio 1:1 and 2:1 show superior performance towards oxygen reduction reaction (ORR) as these composite particles form an interconnected particle-network and maximize the available electrochemically active area. Upon increasing the Pt content we observe decreased activity as a result of aggregation of particles. The performance of Pt-SiO2, composite particles in H-2-fuel cell arc compared with Pt-black catalyst. (c) 2007 Elsevier B.V. All rights reserved.
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