Highly Efficient Pt₅₀-Ru₅₀ Electrocatalysts Supported by Porous Carbons with Ordered Uniform Controllable Pores

摘要

Ordered uniform nanoporous carbons with pore sizes in the range of 10 - 600 nm were synthesized against removable colloidal crystalline templates by carbonization of phenol and formaldehyde as a carbon precursor. The porous carbons have high surface areas, large pore volumes, and three-dimensionally interconnected uniform pore structures, and thus were used as a support of a Pt₅₀-Ru₅₀ alloy catalyst to study their effect on the anodic performance of the catalyst in direct methanol fuel cell. The ordered uniform porous carbon allowed higher degree of dispersion of the catalysts and efficient diffusion of reagents, resulting in much improved catalytic activity for methanol oxidation in the fuel cell. In general, the smaller pore sizes the porous carbons have, the higher surface areas and the better catalytic activity for methanol oxidation they showed.