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 

机构地区：[1]State Key Laboratory of High-Temperature Gas Dynamics,Institute of Mechanics,Chinese Academy of Science,Beijing 100190,China [2]Tianjin University of Science&Technology,Tianjin 300457,China

出　　处：《Carbon Resources Conversion》2023年第4期255-261,共7页碳资源转化（英文）

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

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 catalysts.The investigation is carried out using in-situ DRIFT,O_(2)-TPD,H_(2)-TPR,XRD,and TEM techniques.Our 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 successively.The 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 temperature.Furthermore,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.

关 键 词：Cu-Ce-Zr catalyst Oxygen species Active phase In-situ DRIFT Catalytic oxidation 

分 类 号：O64[理学—物理化学]