超支化铂纳米晶的制备及其电化学性能研究  

Preparation of Hyperbranched Platinum Nanocrystal and Study on Its Electrochemical Property

作　　者：汪林飞[1] 王騊[1] 王晟[1] 

机构地区：[1]浙江理工大学先进纺织材料与制备技术教育部重点实验室,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2014年第4期389-392,共4页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：国家自然科学基金(51372227;21103152;31070888;50802088);浙江省杰出青年科学基金(R2101054);浙江省自然科学基金项目(Y4080392);浙江省科技厅公益性项目(2012C23050);浙江省创新团队项目(2011R50003)

摘　　要：在含有分散剂聚乙烯吡咯烷酮(PVP)的水溶液体系中,L-抗坏血酸(L-ascorbic acid)还原氯铂酸(H2PtCl6·6H2O)制备出高度分散、超支化结构的铂纳米晶。通过TEM、XRD对试样的形貌与结构进行表征。并且采用循环伏安法对其电化学性能进行研究。结果表明:制备的铂纳米催化剂在酸性条件下的甲醇氧化催化性能是商业Pt/C催化剂的1.6倍,同时在0.6V,计时1 000s时的计时电流曲线表明其稳定性比商业Pt/C催化剂好。Highly-dispersed and hyperbranched platinum nanocrystals were prepared in aqueous solution containing the dispersing agent PVP by L-ascorbic acid reducing chloroplatinic acid（H2PtCl6 ·6H2O）.TEM and XRD were used to characterize morphologies and structures of the sample.Cyclic voltammetry was adopted to study the electrochemical property.The resukts show that the methanol oxidation and catalytic performance of the nano-catalyst prepared is 1.6times of commercial Pt/C catalyst in acidic conditions.Meanwhile,chronoamperometry curve recorded at 0.6Vand 1 000sindicates that its stability is better than that of Pt/C catalyst.

关 键 词：超支化 铂纳米晶 商业Pt C 甲醇氧化 

分 类 号：TQ032.4[化学工程]