Single-atom site catalysts for environmental catalysis
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Single-atom site catalysts for environmental catalysis Ningqiang Zhang1, Chenliang Ye1, Han Yan1, Lingcong Li3 (), Hong He2, Dingsheng Wang1 (), and Yadong Li1 1
Department of Chemistry, Tsinghua University, Beijing 100084, China Key Laboratory of Beijing on Regional Air Pollution Control and Beijing Key Laboratory for Green Catalysis and Separation, Beijing University of Technology, Beijing 100124, China 3 Institute for Catalysis, Hokkaido University, Sapporo, Hokkaido 001-0021, Japan 2
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Received: 21 June 2020 / Revised: 17 July 2020 / Accepted: 19 July 2020
ABSTRACT In recent decades, the environmental protection and long-term sustainability have become the focus of attention due to the increasing pollution generated by the intense industrialization. To overcome these issues, environmental catalysis has increasingly been used to solve the negative impact of pollutants emission on the global environment and human health. Supported platinum-metal-group (PGM) materials are commonly utilized as the state-of-the-art catalysts to eliminate gaseous pollutants but large quantities of PGMs are required. By comparison, single-atom site catalysts (SACs) have attracted much attention in catalysis owing to their 100% atom efficiency and unique catalytic performances towards various reactions. Over the past decade, we have witnessed burgeoning interests of SACs in heterogeneous catalysis. However, to the best of our knowledge, the systematic summary and analysis of SACs in catalytic elimination of environmental pollutants has not yet been reported. In this paper, we summarize and discuss the environmental catalysis applications of SACs. Particular focus was paid to automotive and stationary emission control, including model reaction (CO oxidation, NO reduction and hydrocarbon oxidation), overall reaction (three-way catalytic and diesel oxidation reaction), elimination of volatile organic compounds (formaldehyde, benzene, and toluene), and removal/decomposition of other pollutants (Hg0 and SO3). Perspectives related to further challenges, directions and design strategies of single-atom site catalysts in environmental catalysis were also provided.
KEYWORDS single-atom site catalysts, environmental catalysis, volatile organic compounds, CO catalytic oxidation, NO selective reduction, hydrocarbon oxidation
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Introduction
Pollutants, such as carbon monoxide (CO), nitrogen oxides (NOx), hydrocarbon (HC) compounds, volatile organic compounds (VOCs), and other species (sulfur oxides, mercury, particulate matter, and so on) are harmful to both the environment and human health [1–8]. To overcome the negative impact of pollutants emission, environmental catalysis is used to eliminate or at least to decrease the impact of generated pollutants. The environment catalysis can be defined as the study of catalysts and catalytic reaction impacting the environment [9]. Supported metal catalysts, especially supported platinummetal-group (PGM) cataly
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