对碳黑进行不同条件的氧化处理得到不同表面化学状态的载体,以甲醛为还原剂,氯铂酸为前驱体,制备Pt/C电催化剂.运用X射线光电子能谱(XPS)、X射线衍射(XRD)、透射电镜(TEM)等分析手段研究碳黑及Pt/C催化剂的化学组成、化学状态、晶体结构及表面形貌,并用循环伏安法(CV)测试Pt/C催化剂对甲醇的电催化氧化.结果表明,碳黑经氧化处理,表面的化学组成和化学状态均发生了变化,表面的含氧官能团浓度显著增加,增加的含氧官能团为碳黑表面沉积Pt提供了更多锚位,改善了碳黑表面Pt纳米粒子的分散性,降低了Pt纳米粒子的尺寸,使Pt/C催化剂中PtO的含量减少,Pt0含量明显增加,从而提高了Pt/C催化荆对CH3OH氧化的电催化活性.
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