【摘要】 采用电沉积技术在ITO导电基底上制备了氢氧化氧化钴(CoOx(OH)y/ITO)和铜(Cu/ITO)双电极,同时采用循环伏安技术研究了丙酮酸在该双电极上的电化学氧化还原。结果表明:丙酮酸在CoOx(OH)y/ITO上有氧化电流响应,在Cu/ITO上有还原电流响应。在此基础上,利用双电流通道计时电流法,分别在CoOx(OH)y/ITO和Cu/ITO电极上施加0.45V和-1.4V的电位。结果表明:丙酮酸响应的线性范围在CoOx(OH)y/ITO上为低浓度,Cu/ITO上为高浓度,从而利用该双电极在较宽浓度范围内(1.67μmol.L-1～6.01mmol.L-1),实现了丙酮酸的定量检测。更多还原

【Abstract】 Cobalt oxyhydroxide and copper are electrodeposited on a dual-ITO substrate to obtain CoOx(OH)y/ITO and Cu/ITO,and cyclic voltammetry technique is applied for investigating the oxidation and reduction of pyruvic acid over CoOx(OH)y/ITO and Cu/ITO.The results reveal that pyruvic acid arises an oxidation current on CoOx(OH)y/ITO and a reduction current on Cu/ITO.Based on the results,potentials of 0.45V and-1.4V are respectively applied on CoOx(OH)y/ITO and Cu/ITO by using chronoamperometry technique via dual-current channel.As a result,CoOx(OH)y/ITO has a linear response to pyruvic acid at relative low concentrations while Cu/ITO has a linear response at relative high concentrations,therefore the pyruvic acid detection in a wide concentration range(1.67μmol·L-1-6.01mmol·L-1) can be accomplished by the dual-electrode of CoOx(OH)y/ITO and Cu/ITO.更多还原