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本文采用不同pH值的KOH溶液对WC材料进行了不同时间的碱处理,并以该WC为载体通过微波加热还原法制备PtRu/WC复合材料.采用XRD对材料进行结构表征,通过循环伏安法和计时电流法测试电极对甲醇的电催化氧化性能.结果表明,经不同碱性条件处理的WC材料表面更易于铂钌的负载,其中经强碱(pH=14)的KOH溶液处理后可在WC表面得到结晶度最好的铂钌合金,且所得电催化剂PtRu/WC电极的性能最佳,而经碱处理5 h的WC负载的PtRu/WC电极对甲醇氧化的效果最优.
In this paper, different pH values of KOH solution were used to treat the WC material with different time, and the PtRu / WC composite was prepared by microwave heating and reduction method using WC as the carrier.The structure of the material was characterized by XRD, cyclic voltammetry And chronoamperometry were used to test the electrocatalytic oxidation of methanol on the electrode.The results showed that the surface of the WC material treated with different alkaline conditions was more easily loaded with platinum and ruthenium.After the treatment with strong alkali (pH = 14) KOH solution, The best crystallinity of platinum-ruthenium alloy was obtained on the WC surface, and the PtRu / WC electrode exhibited the best electrocatalyst performance. The Pt-loaded PtRu / WC electrode treated with alkali for 5 h had the best methanol oxidation performance.