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利用羧基对金属离子的络合作用在电极表面原位制备金属粒子用于电催化过氧化氢(H2O2).首先在电极表面电沉积聚丙烯酸,然后化学吸附铜离子,再用水合肼将其还原成零价铜.铜粒子簇均匀分散在聚丙烯酸网络中,其尺寸可通过吸附铜离子的数量和吸附-还原次数来控制.由于铜微粒的电催化作用,该修饰电极对H2O2表现出了良好的电流响应.运用该方法可以在电极表面制备多种金属微粒,并且聚丙烯酸的自由羧基可以与氨基反应,从而可共价固定带氨基的酶和抗体,有望构建多种新型的化学和生物传感器.
The metal particles are prepared in situ by the complexation of carboxyl groups on the surface of the electrode for the electrocatalytic hydrogen peroxide (H2O2). First, polyacrylic acid is electrodeposited on the electrode surface, then the copper ions are chemically adsorbed and then reduced with hydrazine hydrate Into zero-valent copper copper particles uniformly dispersed in the network of polyacrylic acid, its size can be controlled by the number of adsorption of copper ions and adsorption-reduction times due to the electrocatalytic effect of copper particles, the modified electrode H2O2 showed good Of the current response.Using this method can be prepared on the electrode surface of a variety of metal particles, and polyacrylic acid free carboxyl can react with the amino group, which can covalently immobilize enzymes and antibodies with amino groups, is expected to build a variety of new chemical and biological sensors .