Ti/SnO_2+Sb_2O_3/PbO_2电极在硫酸溶液中Cr^(3+)氧化的电化学性能

Electrochemical Characteristics of Ti/SnO_2+Sb_2O_3/PbO_2 Anode for the Oxidation of Cr^(3+) in Sulfuric Acid Solution

对用聚合前驱体溶液通过热分解法制备的Ti/SnO2+Sb2O3/PbO2电极在硫酸溶液中Cr3+电化学氧化的电化学性能进行了研究. 分别测定了以Ti/SnO2+Sb2O3/PbO2和PbO2为阳极,硫酸介质中Cr3+电化学氧化过程的极化曲线、抗腐蚀性以及不同操作电流密度、Cr3+浓度、反应温度、硫酸浓度下的电流效率. 实验结果表明,聚合前驱体溶液通过热分解法制备的Ti/SnO2+Sb2O3/PbO2电极与PbO2电极相比具有更高的电催化活性和抗腐蚀性.

The electrochemical characteristics of Ti/SnO2+Sb2O3/PbO2 anode prepared by the polymeric precursor method and thermal decomposition was studied with the electro-oxidation of Cr3+ in H2SO4 solution. The polarization curves of electrochemical oxidation of Cr3+ were determined and the resistance to corrosion was tested using Ti/SnO2+Sb2O3/PbO2 and PbO2 as anode respectively. The operation factors, such as current density, concentration of chromium, temperature and sulfuric acid concentration, which had effects on process current efficiency,were also studied. The experimental results showed that the Ti/SnO2+Sb2O3/PbO2 anode prepared by the polymeric precursor method and thermal decomposition had good resistance to corrosion. The current density of electrochemical oxidation of Cr3+ with Ti/SnO2+Sb2O3/PbO2 anode was 3~6 times higher than that with PbO2 anode at the same potential. The current efficiency of electrochemical oxidation of Cr3+ with Ti/SnO2+Sb2O3/PbO2 was much higher than that with PbO2 anode at the same reaction conditions. The Ti/SnO2+Sb2O3/PbO2 anode demonstrated good electrocatalysis performance.