Ozone Decomposition Reaction over α-Alumina-Supported Silver Catalyst: Comparative Study of Catalytic Surface Reactivity
Ozone Decomposition Reaction over α-Alumina-Supported Silver Catalyst: Comparative Study of Catalytic Surface Reactivity
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DOI：
10.1080/01919512.2014.957261
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发表时间：
2015-05-04
影响因子：
2.7
通讯作者：
Rakovsky, S.
中科院分区：
文献类型：
--
作者：
Batakliev, T.;Tyuliev, G.;Rakovsky, S.
研究了氧化铝负载的银复合体系在非均相催化臭氧分解反应中的作用。负载有银和银改性沸石的珍珠岩也已被测试作为臭氧气相转化为分子氧的催化剂。催化剂已通过煅烧活化，并且使用 XPS 详细表征了反应导致催化表面发生的变化。 SEM分析揭示了表面形貌在Ag/α-Al2O3催化剂表面臭氧分解过程中的作用。提出了催化循环，支持过氧化物作为中间体参与该过程并催化臭氧完全转化为分子氧的重要作用的假设。已发现，用氧化铝负载的银体系实现的最大转化率可达90%。
An alumina-supported silver composite system has been investigated in the reaction of heterogeneous catalytic ozone decomposition. Perlite loaded with silver and silver modified zeolites have also been tested as catalysts for gas phase conversion of ozone to molecular oxygen. The catalysts have been activated by calcination and the changes occurring on the catalytic surface as a result of the reaction have been characterized in details using XPS. The SEM analysis has revealed the role of surface morphology in the process of ozone decomposition on the surface of Ag/alpha-Al2O3 catalyst. A catalytic cycle is proposed that supports the hypothesis about the important role of the peroxide species as intermediates participating in the process and catalyzing the complete ozone conversion into molecular oxygen. It has been found out that the maximum conversion degree, achieved with the alumina-supported silver system, is up to 90%.