摘要
制备了碳纳米管/纳米TiO2复合膜修饰电极(B)和纯纳米膜修饰电极(A)。用XRD,TEM和循环伏安及计时库仑比较了A和B的电化学性能差异。结果表明,大量细小的碳纳米管的存在,可起到阻碍TiO2纳米粒子的团聚作用。碳纳米管独特的原子结构,能在电化学反应中促进电子传递,大大提高了B的电化学性能;B的循环伏安图中氧化还原峰电流比A的高出两倍多,单位时间通过电极的电量大幅度增加;通过对马来酸的异相电催化还原反应进一步证明了B比A具有更高的电催化活性。
C-Nanotube/nano-TiO2 complex film-modified electrode （B） and pure nano-TiO2 filmmodified electrode（A） were prepared. The difference in electrochemical performance between A and B was researched by XRD, TEM, cyclic voltammetry and chronocoulometry. The results showed that the existence of a great deal of carbon nanotubcs can block the agglomeration of nano-TiO2 particles. The unique atomic structure of carbon nanotube can accelerate the electron transfer in electrochemical reaction. Compare to A, the current value of the second redox peak of B was about twice higher than A, and the quantity of electric charge increased greatly at the same time. So we can conclude that B exhibites better electrocatalytic activity than A, and it was further proved by the heterogeneous electrocatalytic reduction of maleic acid.
出处
《合成化学》
CAS
CSCD
2008年第4期410-413,共4页
Chinese Journal of Synthetic Chemistry
基金
国家自然科学基金资助项目(20476001)
安徽高校省级自然科学研究项目(KJ2008B006)
安徽省高校青年教师自然科学资助项目(2007jq1187,2007jq1186)
