New insight into hydroxyl-mediated NH_3 formation on the Rh-CeO_2 catalyst surface during catalytic reduction of NO by CO

作     者：Chengxiong Wang Wenzheng Xia Yunkun Zhao 王成雄;夏文正;赵云昆

作者机构：State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals Kunming Institute of Precious Metals Kunming 650106 Yunnan China State‐Local Joint Engineering Laboratory of Precious Metal Catalytic Technology and Application Kunming Sino‐platinum Metals Catalysts Co. Ltd.Kunming 650106 Yunnan China 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2017年第38卷第8期

页      面：1399-1405页

核心收录：

学科分类：081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China (21463015) the Provincial Applied Fundamental Research Program of Yunnan (2014FA045) the National High Technology Research and Development Program of China (863 Program,2015AA034603)~~ 

主　　题：NH3 formation NO reduction CO oxidation In‐situ DRIFTS Water gas shift 

摘      要：Vibrational IR spectra and light‐off investigations show that NH3forms via the“hydrogen downreaction of adsorbed CO and NO with hydroxyl groups on a CeO2support during the catalytic reduction of NO by *** presence of water in the reaction stream results in a significant increase in *** result is due to water‐induced hydroxylation promoting NH3formation and the competitive adsorption of H2O and NO at the same sites,which inhibits the reactivity of NO reduction by NH3.