论文部分内容阅读
针对常规方法难以去除水中Br_3~-的问题,采用浸渍煅烧法制备了负载型纳米Pd/Al_2O_3粒子电极,研究了该电极电催化还原Br O-3的效果.催化剂的结构表征表明该反应实现了Pd纳米晶的均匀负载,纳米Pd/Al_2O_3具有较高的电催化活性和较低的能耗,其最佳反应条件为3%Pd负载量,0.9 m A·cm-2电流密度和1 g·L催化剂投量,酸性条件可促进Br O-3的直接或间接还原.ESR检测证实了Pd的负载增强了反应体系活性物种[H]的生成,进而促进了Br O-3的间接电催化还原.
Aiming at the problem that it is difficult to remove Br_3 ~ - in water by conventional method, the supported nano-Pd / Al_2O_3 particle electrode was prepared by impregnation calcination method and the effect of electrocatalytic reduction of Br O-3 on the electrode was investigated. The structural characterization of the catalyst showed that Pd nanocrystals. Pd / Al 2 O 3 nanostructures have higher electrocatalytic activity and lower energy consumption. The optimal reaction conditions are Pd loading of 3%, current density of 0.9 m A · cm -2 and adsorption capacity of 1 g · L catalyst dosage and acidic conditions promoted the direct or indirect reduction of Br O-3. ESR detection confirmed that the Pd loading enhanced the formation of reactive species [H] and promoted the indirect electrocatalytic reduction of Br O-3 .