摘要
利用亚锡酸对氯铂酸的弱的多步骤还原制备新型Pt/C催化剂.用XRD、HRTEM、EDS、DSC以及氢吸附电化学对所制备的催化剂进行了表征,并用循环伏安和恒电位极化对其进行了甲醇电氧化催化活性测定.实验结果表明,应用亚锡酸法合成的Pt/C催化剂具有很高的甲醇电氧化催化活性,在0.5V(SCE)电位下,其质量活性约为亚硫酸路线合成的Pt/C催化剂的2倍.亚锡酸法可在纳米尺度范围内生成金属Pt和Pt氧化物共存的复合型碳载催化剂,这种含氧复合型催化剂可以促进Pt在甲醇电氧化过程中双功能作用的有效协调.
The weak multi-step reduction of stannous acid on hexachloroplatinic acid was utilized to prepare a new type of Pt/C catalyst. The catalyst was characterized by XRD, HRTEM, EDS, DSC and H-adsorption electrochemistry, and its catalytic activity for electro-oxidation of methanol was estimated by cyclic voltammogram and potentialstatic steady-state polarization. The results indicate that Pt/C catalyst prepared by the new method is with high activity for electro-oxidation of methanol which possesses about two-fold mass activity at 0.5 V （SCE） compared with Pt/C prepared by sulfurous route. The stannous method can produce a composite carbon-supported catalyst with Pt metal and Pt oxides co-exiting within nanometer dimension. The oxo composite catalyst could enhance the harmony of the hi-function of Pt during electro-oxidation of methanol.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2007年第12期1241-1245,1253,共6页
Journal of University of Science and Technology Beijing
基金
国家自然科学基金资助项目(No.50274010
No.90510001
No.50528404)
国家高技术研究发展计划资助项目(No.2002AA-302404)
