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首页> 外文期刊>Catalysis science & technology >Ambient temperature NO oxidation over Cr-based amorphous mixed oxide catalysts: effects from the second oxide components
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Ambient temperature NO oxidation over Cr-based amorphous mixed oxide catalysts: effects from the second oxide components

机译：环境温度在Cr-based不氧化从非晶混合氧化物催化剂:影响第二次氧化组件

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摘要

Three series of Cr-based mixed oxides (Cr-Co, Cr-Fe, and Cr-Ni oxides) with high specific surface areas and amorphous textures were synthesized using a novel sol-gel method. These mixed oxides, in comparison to their pure metal oxide (CrOx, Co3O4, FeOx and NiO) counterparts, display enhanced performance for catalytic oxidation of low-concentration NO at room temperature. The best performing catalysts achieve 100% NO conversion for similar to 30 h of operation at a high space velocity of 45000 ml g(-1) h(-1). The amorphous structure was found to be critical for these catalysts to maintain high activity and durability. Control of the Cr/M (M = Co, Fe and Ni) molar ratio, nitrate precursor decomposition temperature and catalyst calcination temperature was key to the synthesis of these highly active catalysts.
机译：三个系列Cr-based混合氧化物(Cr-Co、与高特定Cr-Fe和铬镍氧化物)表面区域和非晶态纹理使用新颖的溶胶-凝胶法合成方法。混合氧化物,相比他们的纯金属氧化(鞋、Co3O4 FeOx和NiO)相比,显示增强的催化性能氧化的低浓度没有房间温度。达到100%没有转换类似于30 h操作在一个较高的空速45000毫升g (1) h(1)。对这些催化剂来维持高是至关重要的活动和耐用性。有限公司、铁和镍)摩尔比、硝酸前体分解温度和催化剂煅烧温度是合成的关键这些高度活跃的催化剂。

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