OMC-supported platinum catalyst

The support for the metal nano-particles turns out to be as important as the nano-particles for providing their dispersion and stability. Studies on electron transfer are particularly important for carbon-based materials because those materials, such as glassy carbon, graphite, fullerene, and diamond with different electronic and structural properties, have been proved to possess distinctly different electrochemical properties from each other (Ramesh and Sampath, 2003). Carbon supports provide high electronic conductivity, uniform catalyst dispersion, corrosion resistance, and sufficient access of gas reactants to the catalyst (Ismagilov et al, 2005). In addition to electrical conductivity and surface area, hydrophobicity, morphology, porosity, and 

Alloying and dissolution to produce highly reticulated surfaces Cr, Fe, Sn Typically less than 100 mV lower potential than Pt 

Metal oxides Ru Hydrous Ru oxides are the most active catalyst 

Base metal oxides W,Ti, Nh,Zr,Ta Tungsten oxide is a notable promoter in DMFC. Other metal oxides show relatively smaller effect 

Dispersed nano-particles of noble metals supported on high surface area carbon materials are of considerable interest to catalysis owing to their unique physico-chemical properties (Shukla et al, 1994 Watanabe et al, 1987). The primary function of the support is to separate the individual particles physically in order to diniinish the rate of agglomerization. Support plays a major role in deternrining the mechanical and thermal stability of particles while helping them in highly dispersed state (Attwood et al, 1980). The choice of suitable support is a factor, which affects the performance of supported catalysts. Interaction between the catalysts and the support has 

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