电极表面结构及有机添加物对C60电还原过程的影响

研究了不同电极表面结构及有机添加剂对Ｃ６０电化学还原过程的影响。实验结果表明，富勒烯及其阴离子的电还原活性取决于电极表面结构的影响，即：ｉｐｃ（多晶）〉ｉｐｃ［Ｐｔ（１１１）］〉ｉｐｃ［Ｐｔ（１１０）］，且在Ｐｔ（１１１）及Ｐｔ（１１０）晶面上Ｃ６０＾１－及Ｃ６０＾２－的还原电位均有一定的位移。另外，实验结果还表明当溶液中分别添加苯胺及邻氨基酚时，其对Ｃ６０电还原过程的影响机理将有所不同。

Influences of Electrode Surface Structure and Organic Additives on the Electroreduction of Fullerene

The influences of electrode surface structure and organic additives such as aniline and o-aminophenol on the electroreduction of fullerene are investigated in this paper. It is found that the activity of electroreduction of fullerene and fulleride anions ls dependent on the electrode surface structure. The reduction current of fullerene at polycrystal electrode is higher than those at Pt (111 ) and Pt (110). Some negative shifts of reduction potential of C60- and C602- at Pt (111 ) and Pt (110) are observed. In addition, the effects of some organic additives, such as aniline and o-aminophenol on the reduction of fullerene are also investigat-ed. Different reduction mechanisms are proposed for these two systems, i. e. one is due to the formation of C60-aniline complex, the other is due to chemical reaction between C60 with o-aminophenol in the reduction process.