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首页> 外文期刊>Catalysis science & technology >Probing the existing state of Cu.II) in a Cu- Al spinel catalyst using N2O decomposition reaction with the aid of conventional characterizations
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Probing the existing state of Cu.II) in a Cu- Al spinel catalyst using N2O decomposition reaction with the aid of conventional characterizations

机译：调查现有的Cu - Al Cu.II)尖晶石催化剂使用一氧化二氮的分解反应借助传统的特征

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摘要

Cu-Al spinel solid solution as a sustained release catalyst has been efficiently applied in methanol steam reforming. The non-spinel CuO species in this catalyst plays a crucial role in initiating the reaction. This paper systematically studies the existing state of the copper species using N2O decomposition reaction in combination with other characterization techniques. The non-spinel CuO is composed of free CuO and interacting Cu.II) forming Cu-O-Al bonds. The catalytic activity is related to the existing state of Cu.II), which determines the generation of Cu+ active centers. It has been verified that highly dispersed free CuO facilitates the in situ generation of the Cu+ active centers. Hence, free CuO shows the ability to catalyze the decomposition reaction, while the interacting Cu.II) and spinel type Cu.II) reveal little activity. The activity of CuAl-950 is enhanced dramatically when the interacting Cu.II) is converted to free Cu.II) by reduction-oxidation treatment. Therefore, we suggest that N2O decomposition may be used as a reliable method to probe the existing state of Cu.II).
机译：作为一个持续释放Cu-Al尖晶石固溶体被有效地应用于甲醇催化剂蒸汽重整。这在初始催化剂中起着至关重要的作用的反应。使用现有的铜物种一氧化二氮分解反应结合其他的表征技术。措由自由错和互动Cu.II)形成Cu-O-Al债券。活动相关的现有状态Cu.II),这决定了代铜+活动中心。分散的自由措促进了原位代铜+活性中心。措显示催化能力分解反应,而互动Cu.II)和尖晶石型Cu.II)揭示小活动。时大大Cu.II)进行交互转换成由reduction-oxidation免费Cu.II)治疗。分解可能是作为一个可靠的方法调查现有Cu.II状态)。

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