摘要
采用循环伏安法在PrCl3+K3Fe(CN)6溶液中于石墨电极表面电沉积铁氰化镨(PrHCF)薄膜,制备PrHCF修饰电极。对该修饰电极电化学的行为进行分析,包括扫描速度、K+浓度以及阴、阳离子对膜电极的影响。同时,以红外和XPS对膜进行了表征,IR谱图中氰基的伸缩振动峰证明了膜的存在;而XPS谱图中Fe2p1/2和Fe2p3/2能级的分裂说明了在成膜过程中Fe的价态发生变化,据此提出了可能的电聚合机理。同时,此修饰电极对半胱氨酸具有电催化氧化活性,并对其响应进行了研究。
Praseodymium hexacyanoferrate film was modified on the graphite electrode by cyclic voltammetry in the solution of PrCl3 and K3Fe（CN）6.Its electrochemical properties,including the influence of different scan rates,ions,and K＋ concentrations on the film,were studied.The membrane was characterized by IR and XPS.In IR spectrum,the vibration of cyano group verified from the formation of the film on the electrode.In XPS spectrum,the splitting of Fe2p1/2 and Fe2p3/2 showed that the valence of iron has been changed in the film formation,and a proper electropolymerization mechanism was put forward.The results showed the PrHCF film have some electrocatalytic activity to the oxidation of cysteine.The detection conditions for cysteine such as the potential and pH were also discussed.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
2010年第2期229-232,共4页
Chinese Journal of Analytical Chemistry
基金
湖南大学化学生物传感与化学计量学国家重点实验室开放基金(No.2007011)
广东省教育厅高校优秀青年创新人才培育项目资助
关键词
半胱氨酸
铁氰化镨
电催化
化学修饰电极
Cysteine Praseodymium hexacyanoferrate Electrocatalysis Chemically modified electrode
