MoO_x、WO_x对PtRu/C催化剂甲醇电氧化作用的影响

Effect of metal oxides(Mo,W) as co-catalysts for the electro-oxidation of methanol on carbon-supported platinum-ruthenium

采用甲酸还原的方法制备了PtRu/C催化剂,溶胶-浸渍的方法制备了PtRuWOx /C、PtRuMoOx /C催化剂,通过循环伏安法和电流-电位极化法研究了催化剂对甲醇的电氧化作用。结果表明,MoOx ,WOx 组分对甲醇的电氧化具有促进作用。通过饱和吸附CO溶出电量测定三种电催化剂的电化学表面积,发现MoOx 、WOx 组分对CO无吸附作用,但能有效地催化CO的氧化。

An investigation was carried out in the electro-oxidation of methanol on a carbon-supported ternary PtRu catalysts in half cell experiments, by cyclic voltammetry and stationary current-voltage measurements.The materials were prepared by formic acid reduction and impregnate of metal oxide collodial sols.Using stripping charge of saturated CO coverage as determination of specific electrochemical surface area , the results demonstrated that MoOx , WOx had no adsorption on CO. It was found that the introduction of metal oxidation (MoOx , WOx ) led to the improvement of catalytic activity towords methanol electro-oxidation.