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应用离子交换法制备了40%Pt在Mo2C/GC上的电催化剂.X射线衍射(XRD)显示,Pt在Mo2C载体上有较好的分散度,平均粒径为3 nm.循环伏安、计时电位测试表明,酸性溶液中,Pt-Mo2C/GC具有良好的甲醇氧化性能.其催化甲醇氧化的起始电位比Pt/C的负移了90 mV.这一优异性能与Pt和载体Mo2C之间的协同作用有关.现场红外光谱电化学测量显示,甲醇在Pt/C电极氧化的中间产物是桥式吸附COB和线性吸附COL,而在Pt-Mo2C/GC电极则未检测到有害中间产物CO,其氧化终产物均为CO2.
The electrocatalyst with 40% Pt on Mo2C / GC was prepared by ion exchange method.X-ray diffraction (XRD) showed that Pt has better dispersion on Mo2C support with the average particle diameter of 3 nm. Potential tests show that Pt-Mo2C / GC has good methanol oxidation performance in acid solution, which catalyzes the negative shift of methanol oxidation initial potential by 90 mV from that of Pt / C. This excellent performance is in good agreement with that of Pt and Mo2C On-site infrared spectroscopy electrochemical measurements showed that the methanol oxidation at the Pt / C electrode intermediate products are bridge adsorption COB and linear adsorption COL, Pt-Mo2C / GC electrode is not detected in the harmful intermediate products CO, The final oxidation products are CO2.