采用硬模板法制备了介孔碳化钨(m-WC),进一步还原铂的前驱体(H2PtC16)得到Pt/m-WC催化剂.采用X射线粉末衍射(XRD)、透射电子显微镜(TEM)和X射线光电子能谱(XPS)等测试手段对样品的物相、结构和形貌进行了表征.结果表明,所制得的m-WC载体为单一的碳化钨相,孔径为10～20 nm,Pt/m-WC催化剂中Pt的粒径约为3.4 nm,主要以金属态形式存在,相对比较均一的Pt纳米粒子均匀地分散在载体的表面和孔道中.电化学测试结果表明,与普通WC载Pt催化剂(Pt/c-WC)相比,Pt/m-WC催化剂具有较大的电化学活性表面积,对甲醇呈现出更高的电催化氧化活性和更好的稳定性.
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