纯铜、纯然电极和铜钴合金电极在碱性介质中的光电化学研究

用动电位伏安法对纯铜电极，纯钴电极以及含钴量5.1%,9.7%,15%,25%和40％的铜钴合金电极在硼砂－硼酸缓冲溶液（pH8.5)中的光电化学行为进行了研究，纯铜电极，纯钴电极和铜钴合金电极均显示P－型光响应，纯铜电极的光响应来自Cu2O，纯钴电极的光响应主要来自Co3O4，铜钴合金电极的光响应来自Cu2O和Co3O4的共同作用，纯铜电极在阳极氧化过程中存在着Cu的阳极溶解和电极表面生成Cu2O膜的反应，温度升高有利于Cu2O膜的生成，除氧与否影响纯铜电极的成膜反应，纯钴电极电位正向扫描时不湿示光响应，负向扫描时显示阴极光电流，铜钴合金是极的光响应随含钴量而变化。

PHOTOELECTROCHEMICAL STUDY OF COPPER

The electrochemical behavior of Copper,Cobalt,5.1%Co-94.9%Cu,9.7%Co-90.3%Cu,15%Co-85%Cu,25%Co-75%Cu and 40%Co-60%Cu alloys electrodes in borax buffer solution (pH8.5) was studied by cyclic voltammetry and photocurrent response method.The Copper,Cobalt and Copper-Cobalt alloys electrodes all show P-type photoresponses.The photoresponses of the Copper and Cobalt electrodes come from Cu 2O and Co 3O 4 respectively,while those of the Copper-Cobalt alloys electrodes result from the joint contribution of Cu 2O and Co 3O 4.There exist electrodissolution and Cu 2O layer formation on the Copper electrode during anodic processes.The increase of temperature promotes the growth of Cu 2O layer and argon gas purging also influences Cu 2O layer formation.The Cobalt electrode does not show photoresponse in the positive scan while it shows P-type photoresponse in the negative scan.The photocurrent of Copper-Cobalt alloys electrodes changes with the concentration of cobalt.