采用对氨基苯磺酸对氧化石墨烯(GO)进行表面功能化,进而负载贵金属Pd,解决了Pd团聚和不易在载体表面负载的问题,从而提高了Pd基催化剂对于甲酸的催化能力.实验研究了相同实验条件下,Pd在氧化石墨烯、还原石墨烯(RGO)和磺化处理的石墨烯(SGO)表面的分散和负载量以及得到的复合催化剂的催化性能.实验结果表明,SGO更容易负载贵金属,得到的催化剂对O2气的电催化还原能力优于Pd/GO和Pd/RGO,此外Pd/SGO催化剂对CO的耐受力也明显提升,这可能是苯环上的π-π键和—SO3H的范德华力协同作用更有利于Pd的固定与分散.对Pd/SGO催化氧还原的机理也进行了分析,该氧还原为2电子反应过程.
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