Recombination of H 2 and O 2 catalyzed by hydrophobic Pt/C/FN catalyst at ambient temperature

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Pt/C(w(Pt)=10%) catalyst was prepared by microwave heating method at high pressure,and the average size of Pt particles was(2.1±0.7) nm.Then polytetrafluoroethylene(PTFE) and the Pt/C catalyst were supported on foamed nickel(FN) to obtain hydrophobic Pt/C/FN catalyst.The effects of reaction temperature and H2 flow rate on the catalytic activity of the Pt/C/FN catalyst were determined for the recombination reaction of H2-O2 at ambient temperature.The catalytic activity of the hydrophobic Pt/C/FN catalyst is found to be remarkablely higher than that of the commercial hydrophilic Pt/Al2O3 catalyst.Its catalytic activity decreases little under moist environment,compared with dried condition.The influence of CO on its catalytic activity was examined under excess O2.The H2 conversion is influenced by CO slightly.

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