负载铂纳米粒子大孔炭材料的无模板制备

Abstract: The preparation of macroporous carbon materials containing Pt nanoparticles was investigated. Starch and H2PtCl6 were used as the carbon and Pt source respectively. Two impregnation methods were used to incorporate Pt into the starch gel based macroporous carbon. In the first (A) the starch gel monolith was soaked in H2PtCl6 and reduced by NaBH4. In the second (B) H2PtCl6 was added to the precursors before the starch gel monolith formation. It was found that the size and wall thickness of the macropores of the samples could be controlled by adjusting the starch content, and the carbon yield was increased from 24% to 37% for method A and to 44% for method B. The volume expansion during the carbonization was also suppressed. A smaller particle size and narrow size distribution (average particle diameter is 3.5nm, average particle diameter deviation is 0.9nm) were obtained by method B, compared to method A (average particle diameter is 5.5nm, average particle diameter deviation is 1.8nm).