Generation and Release of OH Radicals from the Reaction of H<sub>2</sub>O with O<sub>2</sub> over Soot

He, Guo‐Zhong; Ma, Jinzhu; Chu, Biwu; Hu, Renzhi; Li, Hao; Gao, Meng; Liu, Yuan; Wang, Yonghong; Ma, Qingxin; Xie, Pinhua; Zhang, Guoxian; Zeng, Xiao Cheng; Francisco, Joseph S.; He, Hong

doi:10.1002/ange.202201638

Cited by 4 publications

(2 citation statements)

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“…23 Next, the latest laboratory study further proved that photoinduced reactive oxygen species (ROS) on the BC surface, including the O 2 1 and OH radical, are the crucial oxidizing agents. 24,25 Taken together, these works highlight the importance of BC in the direct and indirect heterogeneous conversion of SO 2 to sulfate. However, it is worth noting that the mechanism of SO 2 oxidation by NO 2 on the BC surface is still not completely understood, especially under light irradiation.…”

Section: ■ Introductionmentioning

confidence: 77%

“…Additionally, a recent work reported that the photochemical process of BC-containing particles may also play a considerable role during the direct heterogeneous conversion of SO 2 to sulfate in the ambient atmosphere, on the basis of field observations . Next, the latest laboratory study further proved that photoinduced reactive oxygen species (ROS) on the BC surface, including the O 2 1 and OH radical, are the crucial oxidizing agents. , Taken together, these works highlight the importance of BC in the direct and indirect heterogeneous conversion of SO 2 to sulfate. However, it is worth noting that the mechanism of SO 2 oxidation by NO 2 on the BC surface is still not completely understood, especially under light irradiation.…”

Section: Introductionmentioning

confidence: 86%

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Insight into the Mechanism and Kinetics of the Heterogeneous Reaction between SO₂ and NO₂ on Diesel Black Carbon under Light Irradiation

Zhang

Wang

Chen

et al. 2023

Environ. Sci. Technol.

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The heterogeneous oxidation of SO 2 by NO 2 has been extensively proposed as an important pathway of sulfate production during haze events in China. However, the kinetics and mechanism of oxidation of SO 2 by NO 2 on the surface of complex particles remain poorly understood. Here, we systematically explore the mechanism and kinetics of the reaction between SO 2 and NO 2 on diesel black carbon (DBC) under light irradiation. The experimental results prove that DBC photochemistry can not only significantly promote the heterogeneous reduction of NO 2 to produce HONO via transferring photoinduced electrons but also indirectly promote OH radical formation. These reduction products of NO 2 as well as NO 2 itself greatly promote the heterogeneous oxidation of SO 2 on DBC. NO 2 oxidation, HONO oxidation, and the surface photo-oxidation process are proven to be three major surface oxidation pathways of SO 2 . The kinetics results indicate that the surface photooxidation pathway accounts for the majority of the total SO 2 uptake (∼63%), followed by the HONO oxidation pathway (∼27%) and direct oxidation by NO 2 (∼10%). This work highlights the significant synergistic roles of DBC, NO 2 , and light irradiation in enhancing the atmospheric oxidation capacity and promoting the heterogeneous formation of sulfate.

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Section: ■ Introductionmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 86%

Insight into the Mechanism and Kinetics of the Heterogeneous Reaction between SO₂ and NO₂ on Diesel Black Carbon under Light Irradiation

Zhang

Wang

Chen

et al. 2023

Environ. Sci. Technol.

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Dual‐Atomic‐Site Catalysts for Molecular Oxygen Activation in Heterogeneous Thermo‐/Electro‐catalysis

et al. 2023

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Efficient molecular oxygen activation (MOA) is the key to environmentally friendly catalytic oxidation reactions. In the last decade, single‐atomic‐site catalysts (SASCs) with nearly 100 % atomic utilization and unique electronic structure have been widely investigated for MOA. However, the single active site makes the activation effect unsatisfactory and difficult to deal with complex catalytic reactions. Recently, dual‐atomic‐site catalysts (DASCs) have provided a new idea for the effective activation of molecular oxygen (O2) due to more diverse active sites and synergetic interactions among adjacent atoms. In this review, we systematically summarized the recent research progress of DASCs for MOA in heterogeneous thermo‐ and electrocatalysis. Finally, we look forward to the challenges and application prospects in the construction of DASCs for MOA.

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Dual‐Atomic‐Site Catalysts for Molecular Oxygen Activation in Heterogeneous Thermo‐/Electro‐catalysis

et al. 2023

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Efficient molecular oxygen activation (MOA) is the key to environmentally friendly catalytic oxidation reactions. In the last decade, single-atomic-site catalysts (SASCs) with nearly 100 % atomic utilization and unique electronic structure have been widely investigated for MOA. However, the single active site makes the activation effect unsatisfactory and difficult to deal with complex catalytic reactions. Recently, dual-atomic-site catalysts (DASCs) have provided a new idea for the effective activation of molecular oxygen (O 2 ) due to more diverse active sites and synergetic interactions among adjacent atoms. In this review, we systematically summarized the recent research progress of DASCs for MOA in heterogeneous thermo-and electrocatalysis. Finally, we look forward to the challenges and application prospects in the construction of DASCs for MOA.

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Generation and Release of OH Radicals from the Reaction of H₂O with O₂ over Soot

Cited by 4 publications

References 32 publications

Insight into the Mechanism and Kinetics of the Heterogeneous Reaction between SO₂ and NO₂ on Diesel Black Carbon under Light Irradiation

Insight into the Mechanism and Kinetics of the Heterogeneous Reaction between SO₂ and NO₂ on Diesel Black Carbon under Light Irradiation

Dual‐Atomic‐Site Catalysts for Molecular Oxygen Activation in Heterogeneous Thermo‐/Electro‐catalysis

Dual‐Atomic‐Site Catalysts for Molecular Oxygen Activation in Heterogeneous Thermo‐/Electro‐catalysis

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Generation and Release of OH Radicals from the Reaction of H2O with O2 over Soot

Cited by 4 publications

References 32 publications

Insight into the Mechanism and Kinetics of the Heterogeneous Reaction between SO2 and NO2 on Diesel Black Carbon under Light Irradiation

Insight into the Mechanism and Kinetics of the Heterogeneous Reaction between SO2 and NO2 on Diesel Black Carbon under Light Irradiation

Dual‐Atomic‐Site Catalysts for Molecular Oxygen Activation in Heterogeneous Thermo‐/Electro‐catalysis

Dual‐Atomic‐Site Catalysts for Molecular Oxygen Activation in Heterogeneous Thermo‐/Electro‐catalysis

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Product

Resources

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Generation and Release of OH Radicals from the Reaction of H₂O with O₂ over Soot

Insight into the Mechanism and Kinetics of the Heterogeneous Reaction between SO₂ and NO₂ on Diesel Black Carbon under Light Irradiation

Insight into the Mechanism and Kinetics of the Heterogeneous Reaction between SO₂ and NO₂ on Diesel Black Carbon under Light Irradiation