CAJ | 학술논문

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300 nm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3～4 nm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.
채용화학기상침적(CVD)법제비득도납미탄미구(CS),채용침지환원법합성료Pt/CS납미과립.전경관찰표명과립구유광활적표면,기평균립경재300 nm좌우,동시재산물중몰유관찰도납미관화기타잡질.종HRTEM표정결과득출CS상적Pt과립분산균균,직경분포재3～4 nm지간.표명재용액중사용Pt/CS최화제시Pt과립가이균균적분산우CS표면.재최화제중Pt적함량위18%.저충교위이상적Pt/CS과립분포결과유리우기재연료전지전겁중적전최화작용.
Carbon spheres(CS) were synthesized by traditional method-chemical vapor deposition (CVD), with a novel precursor-asphaltene. Pt/CS composite nanopaticles were prepared by the method of impregnation reduction. The structure images show the CS particles with quite smooth surface were dispersed with an average diameter of ca.300 nm, without nanotubes and others. SEM image of Pt particles were on the CS from 3～4 nm. This implies that the Pt particles tended to disperse homogeneously on the surface of CS when the Pt/ CS catalyst had been prepared in the solution. Pt content in the catalysts was 18% for Pt/CS. So the size distribution of Pt/CS was in the ideal range to get a good performance of the catalyst in fuel cells electrodes.