中文摘要：

以无机物NHtF为改性剂，对NaOH处理后的多壁碳纳米管（f1-MWCNTs）进行共价键表面修饰得到f2—MWCNTs，将前驱体溶液在紫外光照射下边还原边负载于f2-MWCNTs表面，制得Pd／f2-MWCNTs催化剂。利用FT—IR、TEM、EDS、XRD和XPS等手段对其进行表征，结果表明f2-MWCNTs表面形成C-F、C—N等化学键和Pd／f2—MWCNTs表面存在Pd—F配位键，通过这些化学键的相互作用改变了Pd的电子结构，从而提高Pd纳米粒子的负载率和分散性。通过电化学测试发现，Pd／f2-MWCNTs催化剂对甲醇具有优异的催化性能，其质量电流密度是JM公司商业Pd／C催化剂的2．87倍。

英文摘要：

In this paper, multi-walled carbon nanotubes （MWCNTs） were firstly pretreated with sodium hydroxide solution （fl-MWCNTs）, and then f1-MWCNTs were covalently modified by ammonium fluoride （f2- MWCNTs）, which were used as a new support for Pd nanoparticles. The new catalysts （Pd/f2-MWCNTs） were prepared by one-step photochemical reduction technique. FT-IR, TEM, XRD and XPS measurements revealed that the C-F and C-N covalence bonds were easily formed on the surface of f2-MWCNTs.In addition, the surface of Pd/f2-MWCNTs had the coordinate bonds Pd-F. The mutual interaction of these chemical bonds made the change of electronic structure of Pd,which enhanced the loading effect and dispersity of Pd nanoparticles. Cyclic electrochemical experiments indicated that electro-catalytic activity of Pd/f2-MWCNTs catalyst for methanol in alkaline medium was about 2.4 times higher than that of the commercial Pd/C （JM） catalyst at the same conditions.