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Controllable Synthesis of Different MnO2 Phases by a Precipitation Method for Effective Ozone Decomposition

文献类型：期刊论文

作者Yu, Hang1,2; Yang, Jiawei3; Lu LL(路玲玲)4; Guo YC(郭雅悰)4; Guan, Jian1; Fan, Guijun1; Zhu, Qiuyi1,2; Han, Ning1,2; Chen, Yunfa1
刊名JOURNAL OF PHYSICAL CHEMISTRY C
出版日期2024-03-20
页码9
ISSN号1932-7447
DOI10.1021/acs.jpcc.4c00465
通讯作者Lu, Lingling(lulingling@imech.ac.cn) ; Han, Ning(nhan@ipe.ac.cn) ; Chen, Yunfa(chenyf@ipe.ac.cn)
英文摘要It is challenging to controllably synthesize manganese dioxide (MnO2) in a facile routine for structure-oriented applications. Herein, gamma-, alpha-, amorphous (a-), and delta-MnO2 are synthesized by the same liquid phase precipitation of KMnO4 and MnSO4 with tailored pH by KOH dosage and pH = 1 HCl washing. An ozone decomposition reaction is adopted as the catalytic activity evaluation probe, and a-MnO2 showed high efficiency of 80-90% to 100 ppm ozone during a 10 h test at weight hours space velocity of 1,200,000 mL g(-1) h(-1). The high activity can be attributed to its high specific surface area, low average Mn oxidation state, and abundant surface oxygen vacancy content. In addition, the activity decrease of a-MnO2 can be attributed to the accumulation of oxygen intermediates, as illustrated by in situ infrared spectroscopy, which however can be reactivated by simple 60 degrees C oven heating. These results provide a facile way to controllably synthesize differently crystallized MnO2, especially for highly efficient ozone decomposition catalysts.
分类号二类
WOS关键词MANGANESE OXIDE CATALYST ; GASEOUS OZONE ; ALPHA-MNO2 ; OXIDATION ; DELTA-MNO2 ; GAMMA-MNO2 ; BETA-MNO2 ; EFFICIENT ; TRANSFORMATION ; CRYPTOMELANE
资助项目National Key Research and Development Program of China[2022YFC3702800] ; National Key R & D Program of China[MESO-23-A06] ; State Key Laboratory of Mesoscience and Engineering
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science
语种英语
WOS记录号WOS:001188356300001
资助机构National Key Research and Development Program of China ; National Key R & D Program of China ; State Key Laboratory of Mesoscience and Engineering
其他责任者Lu, Lingling ; Han, Ning ; Chen, Yunfa
源URL[http://dspace.imech.ac.cn/handle/311007/94667]  
专题力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Mesosci & Engn, Beijing 100190, Peoples R China;
2.Univ Chinese Acad Sci, Sino Danish Coll, Sino Danish Ctr Educ & Res, Beijing 100049, Peoples R China;
3.Tsinghua Univ, Future Lab, Beijing 100084, Peoples R China;
4.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China
推荐引用方式
GB/T 7714		 Yu, Hang,Yang, Jiawei,Lu LL,et al. Controllable Synthesis of Different MnO2 Phases by a Precipitation Method for Effective Ozone Decomposition[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2024:9.
APA Yu, Hang.,Yang, Jiawei.,路玲玲.,郭雅悰.,Guan, Jian.,...&Chen, Yunfa.(2024).Controllable Synthesis of Different MnO2 Phases by a Precipitation Method for Effective Ozone Decomposition.JOURNAL OF PHYSICAL CHEMISTRY C,9.
MLA Yu, Hang,et al."Controllable Synthesis of Different MnO2 Phases by a Precipitation Method for Effective Ozone Decomposition".JOURNAL OF PHYSICAL CHEMISTRY C (2024):9.

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来源：力学研究所

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