氨基酸共聚物/杂金属氰桥配位聚合物/无机银盐复合修饰电极上CO_(2)的电催化还原

Electrocatalytic Reduction of Carbon Dioxide on an Aminoacid Copolymer/Cyano-bridged Heterometallic Coordination Polymers/Silver Salts Composite Modified Electrodes

以玻碳电极为基底,通过电化学沉积法与连续化学浴沉积法相结合制备了氨基酸共聚物/含钕离子杂金属氰桥配位聚合物/磷酸银@亚铁氰化银新型复合修饰电极(Aminoacid copolymer/Nd(Ⅲ)-CyHMCPs/Ag 3PO 4@Ag 4Fe(CN)6/GCE)。以此为工作电极,用循环伏安法研究了CO_(2)的电催化还原行为,实验证实各修饰材料成分之间具有良好的协同催化作用,其有效电流密度值达到0.64 mA/cm^(2)。此外,通过水相红外吸收光谱法对电解液中CO_(2)电还原液相产物进行测试,表明在工作电极上施加-1.30 V(vs.SCE)的还原电位时,CO_(2)选择性电还原为甲酸的效率最高。

In this paper,a novel composite modified electrode coated with aminoacid copolymer/neodymium-containing cyano-bridged heterometallic coordination polymers(Nd(Ⅲ)-CyHMCPs)/silver phosphate@silver ferrocyanide on glassy carbon substrate(Aminoacid copolymer/Nd(Ⅲ)-CyHMCPs/Ag 3PO 4@Ag 4Fe(CN)6/GCE)was prepared by electrochemical deposition and continuous chemical bath deposition.With this electrode as the working electrode,the electrocatalytic reduction behavior of carbon dioxide was studied by cyclic voltammetry,the experimental results showed that there was the excellent synergistic effect among the modified materials,and the effective current density value could reach to 0.64 mA/cm^(2).Moreover,the liquid products of CO_(2)electroreduction in the electrolyte were measured by means of aqueous-phase infrared absorption spectroscopy.The results showed that when the reduction potential of-1.30 V(vs.SCE)was applied on the working electrode,the efficiency of CO_(2)selective electroreduction to formic acid was the highest.