磷钼酸(PMA)修饰炭载Pd催化剂对甲酸氧化的电催化性能

Electrocatalytic performance of phosphomolybdic acid modified and carbon supported Pd catalyst for oxidation of formic acid

为了提高直接甲酸燃料电池(DFAFC)中炭载Pd(Pd/C)催化剂对甲酸氧化的电催化性能,用回流法制备了磷钼酸(PMA)修饰的炭载Pd(PMA-Pd/C)催化剂.并用谱学技术和电化学技术表征了催化剂的组分和结构,发现PMA通过化学作用而牢固地固定在Pd表面.由于PMA-Pd/C催化剂能抑制甲酸的自分解,因此,PMA-Pd/C催化剂对甲酸氧化的电催化性能优于Pd/C催化剂.

In order to increase the electrocatalytic performance of the Pd/C catalyst for the oxidation of formic acid in DFAFC,the PMA-Pd/C catalyst was prepared with the reflux method.The composition and structure of the PMA-Pd/C catalyst was characterized with spectroscopic and electrochemical techniques.It was found that PMA is tightly fixed on Pd surface through the chemical interaction.Because the PMA-Pd/C catalyst can inhibit the decomposition of formic acid,The electrocatalytic performance of the PMA-Pd/C catalyst for the oxidation of formic acid is better than that of the Pd/C catalyst.