Cu-Pd双金属电催化还原硝酸盐的研究进展

Research progress on electrocatalytic reduction of nitrate by Cu-Pd bimetals

大量生活污水和工业废水排放导致地表水中硝酸盐污染加剧,对水生生态系统产生负面影响。而且,人体过量摄入硝酸盐会转化为亚硝酸盐,产生健康问题。因此,有必要对污(废)水中的硝酸盐进行去除。电催化还原技术是近年来兴起的硝酸盐去除技术,其中电极材料是影响电催化还原硝酸盐效果的重要因素。Cu-Pd双金属是当前最有潜力的电催化还原硝酸盐的阴极材料之一。阐述了Cu-Pd双金属电催化还原硝酸盐的机理,并从材料合成方法、载体优化及活性影响因素等角度进行了Cu-Pd双金属电极材料性能优化途径评述,总结了电催化还原硝酸盐过程中Cu-Pd双金属电极材料存在的问题及优化方向,旨在为后续Cu-Pd双金属电催化还原硝酸盐研究提供参考。

Large amount of domestic and industrial wastewater discharge lead to the nitrate pollution in surface water,which can pose negative impacts on aquatic ecosystems.In addition,excessive intake of nitrate converts into nitrite in human bodies,posing a harmful threat to health.Therefore,it is necessary to remove nitrate in wastewater.In recent years,electrocatalytic reduction technology has become an emerging nitrate removal technology.Appropriate electrocatalysts is one of the most important factor that affects nitrate reduction.Cu-Pd bimetallic catalyst is one of the most potential cathodes for electrocatalytic reduction of nitrate.In this paper,the optimization of the performance of Cu-Pd bimetallic catalyst and its mechanism were reviewed from aspects of material preparation methods,carrier optimization and influencing factors.The problems and optimization directions of Cu-Pd bimetallic catalyst in the process of electrocatalytic reduction of nitrates were put forward,aiming to provide reference for Cu-Pd bimetallic materials electrocatalytic reduction of nitrates.