四羧基酞菁配合物修饰电极对分子氧的电还原

Activity of the Chemical Modified Electrodes with Metalphthalocyanines Towards the Reduction of Oxygen

合成了（２，９，１６，２３－四羧基）酞菁（Ｈ２ＴｃＰｃ）及其Ｃｏ（Ⅱ）、Ｒｕ（Ⅲ）、Ｆｅ（Ⅲ）、Ｃｕ（Ⅱ）的配合物（ＣｏＴｃＰｃ、ＲｕＴｃＰｃ、ＦｅＴｃＰｃ、ＣｕＴｃＰｃ），用不可逆吸附法制备了这些化合物的玻碳修饰电极。研究这些修饰电极在酸性和碱性水溶液中对分子氧（Ｏ２）电还原的催化作用，发现酸性水溶液中，ＣｏＴｃＰｃ和ＲｕＴｃＰｃ修饰电极对电还原氧有催化活性，还原产物为过氧化氢；碱性水溶液中，四个配合物修饰电极对电还原氧都有催化活性，其中，ＦｅＴｃＰｃ还原氧的活性较好，它将分子氧（Ｏ２）一步直接还原为水。

tetracarboxylphthocyanine(H2TcPc) and its Co(Ⅱ)、Fe(Ⅲ)、Cu(Ⅱ)、Ru(Ⅲ)coordination compounds(CoTcPc,FeTcPc,CuTcPc,RuTcPc) were synthesized and their chemical modified electrodes(CMEs) prepared.Activity of these CMEs towards the electroreduction of dioxygen in aqueous solution was investigated with cyclic voltammogram.The experiments showed that RuTcpc and CoTcPc were active in the acidic solution,with oxygen being reduced to peroxide;And CoTcPc,FeTcPc,CuTcPc,RuTcPc were active in the alkaline solution,with oxygen being reduced to peroxide on all the complexes with the exception of FeTcPc for which the reduction of dioxygen to water was observed.