摘要
用循环伏安法及旋转圆盘-环电极研究了2,3,16,17-四羧基酞菁钴(CoTCPc)在溶液中及CoTCPc/GC修饰电极上对O_2还原的电催化作用。实验结果表明,CoTCPc对O_2电还原有明显的催化作用。在Co(Ⅱ)TCPc还原为Co(Ⅰ)TCPc的第一个峰电势附近,O_2在CoTCPc/GC修饰电极上定量地还原为H_2O_2,在稍负的第二个峰电势附近,有H_2O_2还原产生H_2O的过程发生。本文并对CoTCPc对O_2还原电催化过程的机理进行了讨论。
The electroreduction of O_2 was examined at Co-2,3,16,17, tetracarboxyphthalocyanine (CoTCPe) modified glassy carbon electrode and in aqueous solution containing CoTCPc with cyclic voltammetry and rotating ring-disk electrode techniques. CoTCPc showed pronounced catalytic effect on the electroreduction of O_2. At CoTCPc/GC electrode O_2 was reduced quantitatively to H_2 O_2 at a potential closely coincident with that of Co(Ⅱ)TCPc to Co(Ⅰ)TCPc reduction and the resultant H_2O_2 reduced to H_2O at a little more negative potential. The catalytic mechanism was suggested.
出处
《华中师范大学学报（自然科学版）》
CAS
CSCD
1993年第1期54-60,共7页
Journal of Central China Normal University：Natural Sciences
关键词
电催化
四羧基酞菁钴
氧
还原
electrocatalysis
O_2 reduction
cobalt-2,3,16,17-tetracarboxyphalocyanine
cyclic voltammetry
rotating ring-disk electrode
