Acid Etching-Induced In Situ Growth of lambda-MnO2 over CoMn Spinel for Low-Temperature Volatile Organic Compound Oxidation
文献类型：期刊论文
| 作者 | Shan, Cangpeng; Zhang, Yan ; Zhao, Qian; Fu, Kaixuan; Zheng, Yanfei; Han, Rui; Liu, Caixia; Ji, Na; Wang, Weichao; Liu, Qingling
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| 刊名 | ENVIRONMENTAL SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2022-06 |
| 期号 | 0页码:1-10 |
| 关键词 | CATALYTIC-OXIDATION MANGANESE OXIDES TOLUENE OXIDATION ACETONE PERFORMANCE STATE TIO2 IONS MARS |
| ISSN号 | 0013-936X |
| 英文摘要 | Surface lattice oxygen is crucial to the degradation of volatile organic compounds (VOCs) over transition metal oxides according to the Mars-van Krevelen mechanism. Herein, lambda-MnO2 in situ grown on the surface of CoMn spinel was prepared by acid etching of corresponding spinel catalysts (CoMn-Hx-Ty) for VOC oxidation. Experimental and relevant theoretical exploration revealed that acid etching on the CoMn spinel surface could decrease the electron cloud density around the O atom and weaken the adjacent Mn-O bond due to the fracture of the surface Co-O bond, facilitating electron transfer and subsequently the activation of surface lattice oxygen. The obtained CoMn-H1-T1 exhibited an excellent catalytic performance with a 90% acetone conversion at 149 degrees C, which is 42 degrees C lower than that of CoMn spinel. Furthermore, the partially maintained spinet structure led to better stability than pure lambda-MnO2. In situ diffuse reflectance infrared Fourier transform spectroscopy confirmed a possible degradation pathway where adsorptive acetone converted into formate and acetate species and into CO2, in which the consumption of acetate was identified as the rate-limiting step. This strategy can improve the catalytic performance of metal oxides by activating surface lattice oxygen, to broaden their application in VOC oxidation. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/47381]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 通讯作者 | Liu, Qingling |
| 作者单位 | 1.Nankai Univ, Renewable Energy Convers & Storage Ctr, Natl Inst Adv Mat, Dept Elect,Tianjin Key Lab Photo Elect Thin Film, Tianjin 300071, Peoples R China 2.Tianjin Univ, Dept Environm Sci & Technol, Tianjin Key Lab Indoor Air Environm Qual Control, State Key Lab Engines, Tianjin 300350, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shan, Cangpeng,Zhang, Yan,Zhao, Qian,et al. Acid Etching-Induced In Situ Growth of lambda-MnO2 over CoMn Spinel for Low-Temperature Volatile Organic Compound Oxidation[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2022(0):1-10. |
| APA | Shan, Cangpeng.,Zhang, Yan.,Zhao, Qian.,Fu, Kaixuan.,Zheng, Yanfei.,...&Liu, Qingling.(2022).Acid Etching-Induced In Situ Growth of lambda-MnO2 over CoMn Spinel for Low-Temperature Volatile Organic Compound Oxidation.ENVIRONMENTAL SCIENCE & TECHNOLOGY(0),1-10. |
| MLA | Shan, Cangpeng,et al."Acid Etching-Induced In Situ Growth of lambda-MnO2 over CoMn Spinel for Low-Temperature Volatile Organic Compound Oxidation".ENVIRONMENTAL SCIENCE & TECHNOLOGY .0(2022):1-10. |
入库方式： OAI收割
来源：生态环境研究中心
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