钯/纳米石墨片复合材料的制备及其对甲醇的电催化性能

Facile preparation of Pd/graphite nanoplate composites for electrocatalytic oxidation of methanol

用改进的Hummers方法和机械剥离法制备纳米石墨片,以硼氢化钠为还原剂,采用一步法制备蠕虫状Pd纳米颗粒/纳米石墨片。结果表明这种新型的纳米石墨片的制备方法简单快速、温和高效。11.5 nm的Pd纳米颗粒能良好地分散在纳米石墨片上,且复合材料在碱性条件下对甲醇具有良好的催化活性和抗毒化性能,比相同条件下制备出的Pd负载在传统的改进Hummers方法制备的氧化石墨烯和商业炭黑Vulcan XC-72的催化性能更佳。

Graphite nanoplates were prepared by combining the modified Hummers and mechanical stripping method.Pd nanoparticles supported on graphite nanoplates were successfully synthesized by a simple one-step reduction method with sodium borohydride as the reducing agent.The results show that this new method for the preparation of graphite nanoplates is simple,fast and efficient.Pd nanoparticles with an average size of 11.5 nm are well dispersed on the surface of graphite nanoplates.The composite materials exhibited excellent catalytic activity and poison resistance for the electro-oxidation of methanol in alkaline medium,superior to the Pd supported on the reduced graphene oxide prepared by traditional modified Hummers method and commercial carbon black Vulcan XC-72,respectively.