采用化学还原法制备了炭载钯（Pd/C）催化剂，浸渍修饰磷钼酸（PMA）制备成复合催化剂. 通过XRD和红外谱图（IR）表征催化剂的组分和结构，采用线性扫描曲线及计时电流曲线考察了该电极的电催化性能. 研究表明，室温（20 ^oC）PMA-Pd/C电极的H₂O₂还原电催化活性更优.

The Pd/C catalyst was prepared with the chemical reduction method, and phosphomolybdic acid (PMA) was modified on the Pd/C catalyst using the dipping method. The compositions and structures of the Pd/C and Pd/C modified by phosphomolybdic acid (PMA-Pd/C) catalysts were characterized with X-ray diffraction and Fourier Transform infrared spectroscopy analyses. The electrocatalytic activity and stability of the catalysts for the reduction of hydrogen peroxide (H₂O₂) were studied using cyclic voltammetry and chronoamperometry. The results showed that the phosphomolybdic acid was tightly fixed on the surface of Pd/C catalyst through the chemical interaction. The eletrocatalytic activity of the PMA-Pd/C on H₂O₂ reduction is higher than that of the Pd/C catalyst.