Role of Carbonaceous Aerosols in Catalyzing Sulfate Formation
文献类型：期刊论文
| 作者 | He, Guangzhi; Ma, Jinzhu; He, Hong
|
| 刊名 | ACS CATALYSIS
 |
| 出版日期 | 2018-05-01 |
| 卷号 | 8期号:5页码:3825-3832 |
| 关键词 | carbocatalyst O-2 activation catalytic oxidation of SO2 sources of sulfate secondary aerosols haze formation first-principles calculations |
| ISSN号 | 2155-5435 |
| 文献子类 | Article |
| 英文摘要 | The persistent and fast formation of sulfate is a primary factor driving the explosive growth of fine particles and exacerbating China's severe haze development. However, the underlying mechanism for the persistent production of sulfate remains highly uncertain. Here, we demonstrate that soot is not only a major component of the particulate matter but also a natural carbocatalyst to activate molecular O-2 and catalyze the oxidation of SO2 to sulfate under ambient conditions. Moreover, high relative humidity, typically occurring in severe haze events, can greatly accelerate the catalytic cycle by reducing the reaction barriers, leading to faster sulfate production. The formation pathway of sulfate catalyzed by carbonaceous soot aerosols uses the ubiquitous O-2 as the ultimate oxidant and can proceed at night when photochemistry is reduced. The high relative humidity during haze episodes can further promote the soot-catalyzed sulfate-producing process. Therefore, this study reveals a missing and widespread source for the persistent sulfate haze formation in the open atmosphere, particularly under highly polluted conditions characterized by high concentrations of both SO2 and particulate carbon, and is helpful to the development of more efficient policies to mitigate and control haze pollution. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/40831]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 推荐引用方式 GB/T 7714 | He, Guangzhi,Ma, Jinzhu,He, Hong. Role of Carbonaceous Aerosols in Catalyzing Sulfate Formation[J]. ACS CATALYSIS,2018,8(5):3825-3832. |
| APA | He, Guangzhi,Ma, Jinzhu,&He, Hong.(2018).Role of Carbonaceous Aerosols in Catalyzing Sulfate Formation.ACS CATALYSIS,8(5),3825-3832. |
| MLA | He, Guangzhi,et al."Role of Carbonaceous Aerosols in Catalyzing Sulfate Formation".ACS CATALYSIS 8.5(2018):3825-3832. |
入库方式： OAI收割
来源：生态环境研究中心
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