由氢、氧直接合成过氧化氢研究新进展

New Research Progress on Direct Synthesis of Hydrogen Peroxide From Hydrogen and Oxygen

介绍了由氢、氧直接合成过氧化氢研究新进展,研究重点是催化剂的组成和制备,其中包括催化金属的组成和载体的选择以及它们的预处理等。研究结果普遍表明,双金属催化物质(Pd-Au或Pd-Pt)的催化性能优于单金属催化物质(Pd);载体对催化剂性能也有显著影响,大多优选活性炭。在一些研究中,进行了对比实验,得出上述结论。实验中主要考察了催化剂生成H2O2的活性和选择性等。此外,还介绍了一些学者对催化金属颗粒在载体表面的形态结构、分布、粒径(纳米级)等对催化剂催化性能影响的研究。

New research progress on direct synthesis of l＂I202 from hydrogen and oxygen is introduced. Accented research terms are composition and preparation of catalysts, including composition of catalytic metals and selection of supports as well as their pretreatment, etc. Most research results show that catalytic performance＇of bi-metal（Pd-Au or Pd-Pt） is superior to that of mono-metal（Pd）, the supports also obviously affect catalytic performance, and activated carbon is generally preferred. In some researches, comparative experiments were carried out for obtaining above-mentioned conclusions. In experiments, catalyst activity and selectivity of H202 formation were mainly examined. In addition, the researches on the effects of the morphological structure, distribution, particle size（nanometer grade）, etc of metallic particles on the support surface upon the catalytic performance of catalyst carried out by some researchers are introduced.