{"title":"通过异质结设计协同调节电荷状态和电子供能能力以固定负电温室气体","authors":"Xiang Meng, Boxu Dong, Liang Zhao, Wenhui Zhou, Xinhao Li, Jiantao Zai, Xuefeng Qian","doi":"10.1016/j.apcatb.2024.123709","DOIUrl":null,"url":null,"abstract":"<p>The net-zero greenhouse gas emission has now become a global strategy. In this context, electronegative fluorinated-gases such as sulfur hexafluoride (SF<sub>6</sub>) and hydrofluorocarbon, have become important emission reduction objects due to their strong global warming potential. In this work, the MnOx@Mn/SiC heterojunction was rationally designed and prepared. Because of the high electron coupling, the positively charged active-site MnOx@Mn (δ<sup>+</sup>) not only promotes the adsorption of SF<sub>6</sub> but also acts as a donor to transport electrons to SF<sub>6</sub>, so that the adsorption and activation of SF<sub>6</sub> are unified in one active site. Therefore, MnOx@Mn/SiC can effectively degrade SF<sub>6</sub> above 450℃, and the degradation amount for 12 vol.% SF<sub>6</sub> can reach 523.8<!-- --> <!-- -->mL<!-- --> <!-- -->g<sup>-1</sup> at 600℃. Furthermore, it also has good degradation performance on hydrofluorocarbons (R-22 and R-410A) even at 100℃. Given the cheap and easy scale-up synthesis, MnOx@Mn/SiC has the potential to reduce the emission of multiple fluorinated-gases in practical applications.</p>","PeriodicalId":244,"journal":{"name":"Applied Catalysis B: Environmental","volume":null,"pages":null},"PeriodicalIF":20.2000,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Synergistic Regulation of Charge State and Electron-donating Ability via Heterojunctions Design for Fixation of Electronegative Greenhouse F-gases\",\"authors\":\"Xiang Meng, Boxu Dong, Liang Zhao, Wenhui Zhou, Xinhao Li, Jiantao Zai, Xuefeng Qian\",\"doi\":\"10.1016/j.apcatb.2024.123709\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The net-zero greenhouse gas emission has now become a global strategy. In this context, electronegative fluorinated-gases such as sulfur hexafluoride (SF<sub>6</sub>) and hydrofluorocarbon, have become important emission reduction objects due to their strong global warming potential. In this work, the MnOx@Mn/SiC heterojunction was rationally designed and prepared. Because of the high electron coupling, the positively charged active-site MnOx@Mn (δ<sup>+</sup>) not only promotes the adsorption of SF<sub>6</sub> but also acts as a donor to transport electrons to SF<sub>6</sub>, so that the adsorption and activation of SF<sub>6</sub> are unified in one active site. Therefore, MnOx@Mn/SiC can effectively degrade SF<sub>6</sub> above 450℃, and the degradation amount for 12 vol.% SF<sub>6</sub> can reach 523.8<!-- --> <!-- -->mL<!-- --> <!-- -->g<sup>-1</sup> at 600℃. Furthermore, it also has good degradation performance on hydrofluorocarbons (R-22 and R-410A) even at 100℃. Given the cheap and easy scale-up synthesis, MnOx@Mn/SiC has the potential to reduce the emission of multiple fluorinated-gases in practical applications.</p>\",\"PeriodicalId\":244,\"journal\":{\"name\":\"Applied Catalysis B: Environmental\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":20.2000,\"publicationDate\":\"2024-01-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Catalysis B: Environmental\",\"FirstCategoryId\":\"1\",\"ListUrlMain\":\"https://doi.org/10.1016/j.apcatb.2024.123709\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Catalysis B: Environmental","FirstCategoryId":"1","ListUrlMain":"https://doi.org/10.1016/j.apcatb.2024.123709","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Synergistic Regulation of Charge State and Electron-donating Ability via Heterojunctions Design for Fixation of Electronegative Greenhouse F-gases
The net-zero greenhouse gas emission has now become a global strategy. In this context, electronegative fluorinated-gases such as sulfur hexafluoride (SF6) and hydrofluorocarbon, have become important emission reduction objects due to their strong global warming potential. In this work, the MnOx@Mn/SiC heterojunction was rationally designed and prepared. Because of the high electron coupling, the positively charged active-site MnOx@Mn (δ+) not only promotes the adsorption of SF6 but also acts as a donor to transport electrons to SF6, so that the adsorption and activation of SF6 are unified in one active site. Therefore, MnOx@Mn/SiC can effectively degrade SF6 above 450℃, and the degradation amount for 12 vol.% SF6 can reach 523.8 mL g-1 at 600℃. Furthermore, it also has good degradation performance on hydrofluorocarbons (R-22 and R-410A) even at 100℃. Given the cheap and easy scale-up synthesis, MnOx@Mn/SiC has the potential to reduce the emission of multiple fluorinated-gases in practical applications.
期刊介绍：
Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including:
1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources.
2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes.
3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts.
4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells.
5.Catalytic reactions that convert wastes into useful products.
6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts.
7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems.
8.New catalytic combustion technologies and catalysts.
9.New catalytic non-enzymatic transformations of biomass components.
The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.
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