Role of oxygen species and active phase of CuCeZrO_(x) prepared with bacterial cellulose for toluene catalytic oxidation

作     者：Chenhang Zhang Chenchen Zhao Running Kang Qinglan Hao Baojuan Dou Feng Bin 

作者机构：State Key Laboratory of High-Temperature Gas DynamicsInstitute of MechanicsChinese Academy of ScienceBeijing 100190China Tianjin University of Science&TechnologyTianjin 300457China 

出 版 物：《Carbon Resources Conversion》 (碳资源转化（英文）)

年 卷 期：2023年第6卷第4期

页      面：255-261页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：the financial support from the Guangxi Key Research and Development Program(AB21220040) 

主　　题：Cu-Ce-Zr catalyst Oxygen species Active phase In-situ DRIFT Catalytic oxidation 

摘      要：The present study investigates the active phases and the role of oxygen species in the toluene oxidation process over CuCeZrO_(x) catalysts prepared with bacterial cellulose(BC),and compares them with nitric acid pickling CuCeZrO_(x)-BC(H)and CeZrO_(x)-BC *** investigation is carried out using in-situ DRIFT,O_(2)-TPD,H_(2)-TPR,XRD,and TEM *** findings suggest that dispersed CuO species on the catalyst surface,Cu-Ce-Zr-O,and Ce-Zr-O solid solutions are active for toluene oxidation over CuCeZrO_(x)-BC,with corresponding activities decreasing *** in-situ DRIFT results demonstrate that gaseous oxygen facilitates the chemisorption of toluene on active oxygen species,forming benzoyl oxide species and partially oxidizing the absorbed intermediates to benzyl alcohol at room ***,lattice oxygen is experimentally found to be involved in the deep oxidation of toluene,and the lattice oxygen present in dispersed CuO species dominates the toluene oxidation process over CuCeZrO_(x)-BC.