Noble Metal Single‐Atom Catalysts for the Catalytic Oxidation of Volatile Organic Compounds. Issue 7 (9th February 2022)

• Record Type: Journal Article
• Authors: Zhang, Lina; Xue, Linli; Lin, Bingyong; Zhao, Qingao; Wan, Shaolong; Wang, Yong; Jia, Hongpeng; Xiong, Haifeng
• Is Part Of: ChemSusChem. Volume 15:Issue 7(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-02-09
• Subjects: environmental chemistry -- heterogeneous catalysis -- oxidation -- pollution abatement -- single-atom catalysts; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.202102494
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Volatile organic compounds (VOCs) are detrimental to the environment and human health and must be eliminated before discharging. Oxidation by heterogeneous catalysts is one of the most promising approaches for the VOCs abatement. Precious metal catalysts are highly active for the catalytic oxidation of VOCs, but they are rare and their high price limits large‐scale application. Supported metal single‐atom catalysts (SACs) have a high atom efficiency and provide the possibility to circumvent such limitations. This Review summarizes recent advances in the use of metal SACs for the complete oxidation of VOCs, such as benzene, toluene, formaldehyde, and methanol, as well as aliphatic and Cl‐ and S‐containing hydrocarbons. The structures of the metal SACs used and the reaction mechanisms of the VOC oxidation are discussed. The most widely used SACs are noble metals supported on oxides, especially on reducible oxides, such as Mn2 O3 and TiO2 . The reactivity of most SACs is related to the activity of surface lattice oxygen of the oxides. Furthermore, several metal SACs show better reactivity and improved S and Cl resistance than the corresponding nanocatalysts, indicating that SACs have potential for application in the oxidation of VOCs. The deactivation and regeneration mechanisms of the metal SACs are also summarized. It is concluded that the application of metal SACs in catalytic oxidation of VOCs is still in its infancy. This Review aims to elucidate structure–performance relationships and to guide the design of highly efficient metal SACs for the catalytic oxidation of VOCs. Abstract : Bono VOCs : Volatile organic compounds (VOCs) are detrimental to the environment and human health and must be eliminated. Precious metal catalysts are highly active for oxidation of VOCs, but their rarity and high price limits large‐scale application. Supported metal single‐atom catalysts (SACs) have high atom efficiency and can mitigate such limitations. This Review summarizes recent advances in the use of SACs for oxidation of VOCs.