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Synthesis of Cu2O micro/nanocrystals for catalytic combustion of high-concentration CO: The crucial role of glucose

文献类型：期刊论文

作者Ma, Pandong3,4; Zhang, Chenhang3,4; Dou, Baojuan3; Yi, Xiaokun3; Bin, Feng2,4; Liang, Wenjun1; Bin F(宾峰)
刊名CHEMOSPHERE
出版日期2023-02-01
卷号314页码:11
ISSN号0045-6535
关键词Cu 2 O micro Nanocrystals Carbon monoxide Self-sustained catalytic combustion Chemically adsorbed oxygen
DOI10.1016/j.chemosphere.2022.137720
通讯作者Bin, Feng(binfeng@imech.ac.cn) ; Liang, Wenjun(liangwenj@bjut.edu.cn)
英文摘要Cubic Cu2O micro/nanocrystals were successfully synthesized by liquid-phase reduction using copper salt of CuSO4 or CuCl2.2H2O, and glucose or ascorbic acid as reducing agent, respectively. The activity of the catalysts was evaluated by light-off curves of CO self-sustained catalytic combustion via temperature-programmed oxidation of CO (CO-TPO), with the results showing the activity of catalysts following the order of Cu2O-ClGLU > Cu2O-S-GLU > Cu2O-S-AA > Cu2O-Cl-AA, (Cl denotes CuCl2.2H2O, GLU denotes glucose, S denotes CuSO4 and AA denotes ascorbic acid, respectively), corresponding to the ignition temperature of 109 degrees C, 122 degrees C, 137 degrees C and 186 degrees C, respectively. The crystal structure, elemental valence, morphology and redox property of the prepared catalysts were analyzed by using various characterization techniques. Combined with in situ infrared spectrum, the CO self-sustained catalytic combustion over Cu2O catalysts mainly follows the Mars-van-Krevelen (M-v-K) mechanism: the adsorbed and activated CO reacts with lattice oxygen to yield CO2 and oxygen vacancy, and then the oxygen vacancy can be replenished by gaseous oxygen. Combined with catalytic performance of high-concentration CO, it is found that the catalysts prepared using glucose as reducing agent are more angular compared with ascorbic acid. The Cu2O-Cl-GLU synthesized with glucose and CuCl2.2H2O exhibits the best catalytic activity among all the catalysts tested, attributing to its more obvious edge and rough crystal surface. The unique structure of Cu2O-Cl-GLU leads to the high exposure rate and coordination unsaturation of atoms on the cubic Cu2O micro/nanocrystals that can improve the ability of activating gaseous O2 and low temperature reducibility, and consequently facilitating the catalytic activity.
WOS关键词SELF-SUSTAINED COMBUSTION ; CUPROUS-OXIDE ; CARBON-MONOXIDE ; SCALE SYNTHESIS ; CUO ; PERFORMANCE ; OXIDATION ; NANOCUBES ; REDUCTION ; EVOLUTION
资助项目Novel Technology of High Efficient Clean Combustion and Energy Saving on Converter Gas[XDA21040500] ; National Natural Science Foundation of China[52176141]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000917329000001
资助机构Novel Technology of High Efficient Clean Combustion and Energy Saving on Converter Gas ; National Natural Science Foundation of China
源URL[http://dspace.imech.ac.cn/handle/311007/91581]  
专题力学研究所_高温气体动力学国家重点实验室
通讯作者Bin, Feng; Liang, Wenjun
作者单位1.Beijing Univ Technol, Key Lab Beijing Reg Air Pollut Control, Beijing 100124, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
3.Tianjin Univ Sci & Technol, Coll Marine & Environm Sci, 30022, Tianjin, Peoples R China
4.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Ma, Pandong,Zhang, Chenhang,Dou, Baojuan,et al. Synthesis of Cu2O micro/nanocrystals for catalytic combustion of high-concentration CO: The crucial role of glucose[J]. CHEMOSPHERE,2023,314:11.
APA Ma, Pandong.,Zhang, Chenhang.,Dou, Baojuan.,Yi, Xiaokun.,Bin, Feng.,...&宾峰.(2023).Synthesis of Cu2O micro/nanocrystals for catalytic combustion of high-concentration CO: The crucial role of glucose.CHEMOSPHERE,314,11.
MLA Ma, Pandong,et al."Synthesis of Cu2O micro/nanocrystals for catalytic combustion of high-concentration CO: The crucial role of glucose".CHEMOSPHERE 314(2023):11.

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来源：力学研究所

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