利用HF溶液处理20～40 nm的MWCNTs后,负载光化学还原法合成的Au纳米粒子,获得了HF改性的Au/MWCNTs纳米催化剂.TEM图表明Au纳米粒子平均粒径约为4.5 nm,均匀负载在MWCNTs表面.XPS结果表明Au/MWCNTs表面可能存在Au-F配位键.另外,C,F之间易形成共价键.由于这些化学键的相互作用共同导致C,F,Au三者之间的电子效应,改变了Au的电子结构,从而有利于改善Au的负载效果,提高Au/MWCNTs的电催化活性.电化学测试结果表明Au/MWCNTs纳米催化剂对甲醇具有明显的电催化氧化活性和良好的稳定性.
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