The Reactivity of Ozone on Transition Metal Oxide Catalysts

9311876 Oyama 这是一个研究臭氧对过渡金属氧化物的反应。 氧化物催化剂上的臭氧分解观察到的氧化物支持和氧化物-氧化物相互作用的影响，动力学测量最活跃的系统。 氧化物的吸附/脱附性能进行了研究，使用程序升温技术，臭氧吸附的模式进行了研究，使用同位素混乱。 单组分和二元催化体系中的分散、相组成和表面中间体是用X射线衍射和激光拉曼光谱测定的。 采用诸如霍尔效应、石英晶体微量天平和表面电荷测量的原位技术来显示p型氧化物是否是活性更高的催化剂以及超氧离子（02-）是否是可能的反应中间体。 最后，观察了臭氧/氧气混合物与乙醇或丙烯的反应性。 过渡金属氧化物对臭氧的催化反应和分解作用已是“常识”，但对这类体系的系统研究还很少。 本研究不仅对臭氧的环境归宿问题，而且对环境或职业环境中臭氧水平控制技术的发展具有重要的现实意义。 ***

9311876 Oyama This is a study of the reactions of ozone on transition-metal oxides. Ozone decomposition on oxide catalysts is observed to determine the effects of oxide-support and oxide-oxide interactions; kinetics measurements are made for the most active systems. Adsorption/desorption properties of the oxides are studied using temperature-programmed techniques; the mode of ozone adsorption is studied using isotope scrambling. Dispersion, phase composition, and surface intermediates in single-component and binary catalytic systems are determined using X-ray diffraction and laser Raman spectroscopy. In situ techniques such as the Hall effect, quartz-crystal microbalance, and surface charge measurements are employed to show whether p-type oxides are more active catalysts and whether the superoxide ion (02-) is a possible reaction intermediate. Finally, the reactivities of ozmne/oxygen mixtures with ethanol or propylene are observed. It is "common knowledge" that transition-metal oxides can catalyze reactions and decomposition of ozone, but these systems have never been studied systematically. This study has not only fundamental significance, but also practical importance both in issues about the environmental fate of ozone and in the development of technology to control ozone levels in environmental or occupational settings. ***