PtRuMo/C催化剂的制备及其对甲醇的电催化氧化作用

Prepration of Carbon-Supported PtRuMo Catalysts and the Activity for the Electrooxidation of Methanol

采用混合水溶液浸渍、硼氢化钠还原的方法制备了PtRuMo/C催化剂。以饱和吸附的CO溶出电量归一化电流表示电催化剂对甲醇的电催化氧化活性 ,在半电池中考察了硫酸溶液中 ,甲醇的浓度、温度对催化剂的活性的影响 ,并筛选了催化剂的适宜组成 ,n(Pt)∶n(Ru)∶n(Mo) =1∶0 5∶1较好。此催化剂适宜在室温下使用 ,适宜的甲醇浓度为 1 0～ 2 0mol/L。

The electrooxidation of methanol on a carbon-supported PtRuMo catalysts prepared by liquid-phase NaBH 4 reduction method has been investigated. The stripping current of saturated-adsorption CO is defined as normalization activity toward methanol oxidation. The effects of methanol concentration and temperature on the catalytic activity in a half-cell containing sulfuric acid electrolyte was studied. The optimal molar ratio of Pt to Ru to Mo was found to be 1∶0.5∶1. The catalyst had high activity at ambient temperature and its activity increased with the increase of temperature. The optimal methanol concentration was 1.0～2.0 mol/L at ambient temperature.