高分散的介孔碳载Pt纳米粒子的制备及其对乙二醇的电催化氧化性能  

Highly Dispersed Pt Nanoparticles Supported on Mesoporous Carbon and Its Electrocatalytic Performance for Ethylene Glycol Oxidation

作　　者：陈智栋[1,2,3] 陈转霞[1] 汤佳丽[1] 许娟[1,2] 王文昌[1,2] 曹剑瑜[1,2] 

机构地区：[1]常州大学石油化工学院,常州213164 [2]江苏省太阳能电池与储能技术重点实验室,常州213164 [3]日本阔智电子有限公司,大阪590-0906

出　　处：《化学学报》2012年第3期241-246,共6页Acta Chimica Sinica

基　　金：国家自然科学基金(Nos.21003015;21103014);江苏省企业博士集聚计划基金(No.2011Z0062);江苏省高校优势学科建设工程和常州大学科研基金(No.ZMF10020015)资助项目~~

摘　　要：以二氧化硅溶胶为硬模板,嵌段聚合物F127为软模板,通过双模板法合成了高介孔比例、窄孔径分布的介孔碳(MC).进而经乙二醇还原法制备了高分散的MC载铂催化剂(Pt/MC).采用循环伏安、计时电流、线性扫描伏安和电化学阻抗谱法研究了硫酸溶液中乙二醇在Pt/MC催化剂电极上的电化学氧化行为.实验结果表明,Pt/MC催化剂对乙二醇的电催化氧化性能显著高于商业化炭黑XC72R载Pt(Pt/XC72R)催化剂.电化学阻抗谱分析进一步揭示,乙二醇在Pt/MC催化剂电极上的电氧化反应具有较低的电荷传递电阻.Pt/MC催化剂高的电催化活性可以归结于MC大的孔径和均一的介孔结构对电子传输和传质的促进作用.Mesoporous carbon （MC） with high mesopore content and narrow pore size distribution was prepared using colloidal silica as hard template and Pluronic F127 triblock copolymer as soft template, respectively. Then highly dispersed Pt catalyst supported on MC was achieved by ethylene glycol （EG） reduction method. Electrooxidation behavior of EG on the Pt/MC catalyst electrode in sulfuric solution was investigated using cyclic voltammogram （CV）, chronoamperometry, linear sweeping voltammogram （LSV） and electrochemical impedance spectra （EIS） analysis. The experimental results indicate that the electrocatalytic performance of the Pt/MC catalyst for EG oxidation is much higher than that of Pt/XC72R catalyst. EIS analysis further reveals that the electrooxidation reaction of EG on the Pt/MC catalyst electrode has a lower charge-transfer resistance. The higher electrocatalytic activity of the Pt/MC catalyst may be due to the promotion of the MC support with large pore size and uniform mesoporous structure on electron transfer and mass transfer.

关 键 词：介孔碳 双模板法 乙二醇 电催化 电荷传递电阻 

分 类 号：O643.3[理学—物理化学]