以柠檬酸钠为稳定剂，通过一锅法在乙二醇体系中制得高分散的Pd-Cu/C二元合金催化剂. 用高分辨透射电镜和XRD观察、表征其形貌和结构，经重复循环扫描对Pd-Cu/C催化剂进行去合金化处理，研究了去合金效应对甲酸根电催化氧化性能的影响. 通过吸附CO的原位ATR-IR光谱测量，初步探讨了去合金前后催化剂表面结构的改变. 研究表明，Cu的去合金化可提高Pd-Cu/C电极初始的电催化氧化活性，但不利于其长时间的活性保持；合金化Pd-Cu/C电极电催化稳定性有显著的优势. ; Carbon supported highly dispersed Pd-Cu nanoalloy catalyst toward formate electrooxidation is prepared via one-pot synthesis by using ethylene glycol as the reducing agent and sodium citrate as the stabilizer. The as-prepared catalyst is structurally characterized by TEM and XRD. The Cu dealloyment is carried out through repetitive potential cycling of the Pd-Cu/C catalyst in an acidic solution. The dealloying effect on the performance of the Pd-Cu/C is investigated by using cyclic voltammetry and chronoamperometry, and the surface structural change of Pd-Cu/C is probed by in situ ATR-IR measurement. The results show that the as-prepared Pd-Cu/C processes a better long-term stability than the dealloyed one in electrocatalytic oxidation of formate, while the dealloyed Pd-Cu/C exhibits a higher initial electrocatalytic activity. ; 国家自然科学基金项目（No. 21073045，No. 21273046）和上海市重点项目（No. 11JC140200，No. 08DZ2270500）资助 ; 作者联系地址：复旦大学 化学系，能源材料协同创新中心，上海市分子催化和功能材料表面重点实验室，上海 200433 ; Author's Address: Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Chemistry, Fudan University, Shanghai 200433, China ; 通讯作者E-mail：wbcai@fudan.edu.cn