| Controllable Synthesis of Different MnO2 Phases by a Precipitation Method for Effective Ozone Decomposition | |
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
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| Corresponding Author | Lu, Lingling([email protected]) ; Han, Ning([email protected]) ; Chen, Yunfa([email protected]) |
| Source Publication | JOURNAL OF PHYSICAL CHEMISTRY C
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| 2024-03-20 | |
| Pages | 9 |
| ISSN | 1932-7447 |
| Abstract | 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. |
| DOI | 10.1021/acs.jpcc.4c00465 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:001188356300001 |
| WOS Keyword | MANGANESE OXIDE CATALYST ; GASEOUS OZONE ; ALPHA-MNO2 ; OXIDATION ; DELTA-MNO2 ; GAMMA-MNO2 ; BETA-MNO2 ; EFFICIENT ; TRANSFORMATION ; CRYPTOMELANE |
| WOS Research Area | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| WOS Subject | Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| Funding Project | 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 |
| Funding Organization | National Key Research and Development Program of China ; National Key R & D Program of China ; State Key Laboratory of Mesoscience and Engineering |
| Classification | 二类 |
| Ranking | 1 |
| Contributor | Lu, Lingling ; Han, Ning ; Chen, Yunfa |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/94668 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 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 |
| Recommended Citation 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.Rp_Au:Lu, Lingling, Han, Ning, Chen, Yunfa |
| 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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