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中文摘要：
采用化学气相沉积（CVD）法制备了洋葱状富勒烯（onion-like fullerenes，OLFs），并用硝酸对其进行了预处理．采用浸渍还原法，使用i种不同含量的甲醛为还原剂，制备了Pt／OLFs催化剂．XRD谱图表明，使用过量HCHO有助于Pt晶粒的生长．高分辨透射电镜（HRTEM）分析结果表明，使用过量HCHO作还原剂制备的P“OLFs催化剂中Pt颗粒分散均匀，直径分布在2．5～3．5nm之间．傅立叶红外（FT-IR）实验证明酸处理后OLFs表面含有大量羰基、羟基和羧基等官能团．热重（TG）实验表明Pt的担载率较高．结果表明过量HCHO在生成Pt／OLFs的过程中起到了重要的还原作用．
英文摘要：
Onion-like Fullerenes （OLFs） were prepared by CVD method, and purified by nitric acid treatment. Pt/OLFs catalyst was prepared by impregnation-reduction method with three different loadings of formaldehyde as the reductor and the morphology and structure were characterized. XRD patterns showed that excessive reductor benefits the growth of Pt crystals. HRTEM images showed that Pt particles with diameter of 2.5-3.5 nm had well distribution in the Pt/OLFs catalyst. FT-IR spectrum also indicated lots of functional groups existed on the.surface of OLFs purified. TG pattern showed the high supporting rate of Pt. The results showed that a reducing action of formaldehyde took place during the growth of Pt/OLFs.
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