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采用化学气相沉积(CVD)法制备得到纳米碳微球(CS),采用浸渍还原法合成了Pt/CS纳米颗粒。电镜观察表明颗粒具有光滑的表面,其平均粒径在300nm左右,同时在产物中没有观察到纳米管和其它杂质。从HRTEM表征结果得出CS上的Pt颗粒分散均匀,直径分布在3～4nm之间。表明在溶液中使用Pt/CS催化剂时Pt颗粒可以均匀的分散于CS表面。在催化剂中Pt的含量为18%。这种较为理想的Pt/CS颗粒分布结果有利于其在燃料电池电极中的电催化作用。
Nanocrystalline carbon microspheres (CS) were prepared by chemical vapor deposition (CVD) method, and Pt / CS nanoparticles were synthesized by impregnation method. Electron microscopy showed that the particles had a smooth surface with an average particle size of about 300 nm with no nanotubes and other impurities observed in the product. From HRTEM characterization results obtained on the CS Pt particles dispersed evenly, the diameter distribution between 3 ~ 4nm. It indicates that the Pt particles can be uniformly dispersed on the CS surface when the Pt / CS catalyst is used in solution. The content of Pt in the catalyst was 18%. This desirable result of the Pt / CS particle distribution favors its electrocatalysis in the fuel cell electrode.