Preparation Of Ptconi Alloy Nanoparticles Loaded On Carbon Black By Spray Drying For Catalytic Oxidation Of Methanol

The chloroplatinic acid, nickel chloride and cobalt nitrate, as raw materials, were used to synthesize PtCoNi alloy nanoparticles with well dispersion loaded on XC-72 carbon black by spray drying method combined with calcination reduction. The influence of the surface of the carbon black on the formation and dispersion of alloy nanoparticles was studied, and the effects of PtCoNi with the same atomic ratio and PtCoNi with different atomic ratios on methanol catalytic oxidation activity and CO poisoning resistance and durability were investigated. The results show that PtCoNi catalyst loaded on surface modified carbon black is alloy nanoparticles, and the nanoparticles are dispersed evenly on the surface of carbon black with particle size distribution of 1 similar to 4 nm and average particle size of 2.3 nm. Compared with commercial Pt/C catalysts, PtCoNi/C with the same atomic ratio has higher catalytic methanol oxidation activity, durability and CO poisoning resistance. The order of activity of PtCoNi catalysts with different atomic ratios in catalytic methanol oxidation reaction is: PtCoNi/C>Pt3CoNi/C>Pt5CoNi/C, and the sequence of CO poisoning resistance is PtCoNi/C>Pt3CoNi/C>Pt5CoNi/C.