(上海電力學(xué)院電化學(xué)研究室，上海 200090
上海大學(xué)電化學(xué)研究室，上海 201800)
廈門大學(xué)化學(xué)系，廈門 361005)
摘 要: 采用現(xiàn)場動(dòng)態(tài)阻(容)抗法對(duì)不同支持電解質(zhì)溶液中電沉積金銦硒薄膜電極上陰極還原H2O2時(shí)產(chǎn)生的電化學(xué)振蕩行為進(jìn)行了研究。通過AES能譜和激光掃描電化學(xué)測試對(duì)振蕩前后的電極表面組成及狀況的分析發(fā)現(xiàn)，電化學(xué)振蕩能使金銦硒半導(dǎo)體薄膜的光電效應(yīng)減弱乃至消失，其原因是由于隨著振蕩的進(jìn)行破壞了金銦硒的半導(dǎo)體結(jié)構(gòu)和半導(dǎo)體溶液界面結(jié)構(gòu)。對(duì)振蕩機(jī)理的研究發(fā)現(xiàn)，在以KCl為支持電解質(zhì)的電化學(xué)振蕩體系中，由于Cl-的特性吸附和活化作用，并且在振蕩過程中Cl- 參與了薄膜的組成，其陰極向掃描過程中振蕩產(chǎn)生的極化電位區(qū)域與陽極向過程相吻合；而在以KNO3為支持電解質(zhì)的振蕩體系中，由于沒有Cl-的特性吸附，其陰極向過程與陽極向過程中振蕩產(chǎn)生的極化電位區(qū)域表現(xiàn)出一定的差異。
關(guān)鍵字: 金銦硒 動(dòng)態(tài)阻(容)抗法 電化學(xué)振蕩 電沉積
（Electrochemistry Research Center,Shanghai Institute of Electric Power, Shanghai 200090, P. R. China
Electrochemistry Research Center,Shanghai University, Shanghai 201800, P. R. China
Department of Chemistry, Xiamen University, Xiamen 361005, P. R. China）
Abstract:The electrochemical oscillation behaviour of hydrogen peroxide cathodic reduction process on the electrodeposited gold indium selenide electrode has been studied by using in-situ dynamic impedance and condensance measurement technique in different supporting electrolyte solutions. The surface composition of AuInSe2 electrodes (before and after oscillating) was also given by AES and in-situ photoelectrochemical methods. It was discovered that the electrochemistry oscillation could decrease the photoelectric effects of AuInSe2 films and the reason was that the structure of AuInSe2 films and the interface structure between AuI nSe2 and the solution had been destroyed with the proceeding of oscillating. Last, the mechanism of oscillation on AuInSe2 electrodes was analyzed and discussed . Because of the specific adsorption and active action of Cl-, the mechanism of oscillation in the system which KCl is the supporting electrolyte is different from the mechanism of oscillation in the system which KNO3 is the supporting electrolyte.
Key words: gold indium selenide dynamic impedance and condensance method electrochemistry oscillation electrodeposition
