Pt/陶瓷电极上醇类的阳极氧化作用及其钼和钨的添加对电极活性的影响(英文)

Effect of Molybdenum and Tungsten on the Activity of Pt/ceramic Membrane Electrodes for Anodic Oxidation of Alcohol

采用电沉积Pt在陶瓷膜的方法制得了一种新型的可用于醇类阳极氧化的陶瓷基底电极,采用在电沉积前用氧化钨的溶胶或硅钨酸或硅钼酸的溶液浸渍陶瓷膜的方法可将钨和钼添加到电极中。实验发现:钨和钼的添加可以十分显著地提高催化剂的活性,如:对于甲醇的阳极氧化,添加硅钼酸的电极上的电流密度可达到187mA/cm^2,为相同条件下不含硅钼酸的电极的5倍多。对于乙醇的阳极氧化也得到了相同的结果。

A new type of ceramic-based electrode that could be utilized in anodic oxidation of alcohol was prepared by electrodepositing platinum onto a ceramic membrane. Tungsten and molybdenum were incorporated into the electrode by immersing the membrane in a sol of tungsten oxide or tungstosilicic acid or silicomolybdic acid. The tungsten and molybdenum promoted the activity of the electrode to a considerable degree. The current density of the Pt-Mo-Si/C/M electrode could be as high as 187 mA/ cm2 during the oxidation of methanol, and it was five times more active than that of Pt/C/M at the same working conditions. Similar results were obtained in the oxidation of ethanol.