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- 2015
嵌段共聚物模板法一步制备WC/C基底电极材料
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Abstract:
摘要 以酚醛树脂作为碳源，采用嵌段共聚物模板法一步制备新型有序介孔碳化钨/碳（WC/C）纳米颗粒. WC/C颗粒的比表面积为414 m2·g-1，表面的平均孔径约为38 nm，处于介孔范围内（2 ~ 50 nm）. 通过调节树脂预聚时间以及碳化温度等条件制备出结构形貌较优的WC/C复合材料，并探讨了材料形成机理. 使用X射线衍射、扫描电镜、透射电镜及氮气吸脱附等方法表征了复合材料的结构. 将贵金属铂负载于WC/C表面制备得新电催化材料Pt-WC/C，使用循环伏安法和计时电流法对Pt-WC/C复合材料的电化学性能进行检测，并与商用碳载铂（Pt/C）材料进行对比. 测试结果发现，Pt-WC/C对甲醇的电催化活性以及稳定性等方面都表现出优于商用Pt/C材料的活性，这主要归功于碳化钨高度分散于碳表面
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