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Nitrogen dioxide (NO2) is a major air pollutant that poses serious health risks and contributes to the formation of acid rain and smog. A promising approach to mitigate NO2 emissions is to catalytically convert it to harmless nitrogen and oxygen through selective reduction. Many catalysts have been developed for this purpose, but most suffer from low selectivity, high cost, and poor stability. Recently, a new type of catalyst based on metal-organic frameworks (MOFs) has emerged as a promising alternative. MOFs are porous materials composed of metal ions and organic ligands that can be tailored for specific applications. One advantage of MOF-based catalysts is the ability to control the size and distribution of active sites, which can greatly enhance their catalytic performance. In a recent study, researchers developed a novel MOF-based catalyst containing atomically dispersed copper (Cu) sites for NO2 reduction. The catalyst was synthesized by incorporating Cu ions into the framework of a MOF, which resulted in the formation of highly dispersed Cu sites with a uniform size and distribution throughout the material. The Cu-MOF catalyst exhibited excellent catalytic activity and selectivity for NO2 reduction under ambient conditions, with a conversion rate of up to 91% and a selectivity of over 99% towards nitrogen. Moreover, the catalyst showed remarkable stability and could maintain its high performance for over 20 hours of continuous operation. The superior catalytic performance of the Cu-MOF catalyst is attributed to the unique properties of the atomically dispersed Cu sites, which provide a large number of active sites with high accessibility and activity. The Cu sites also exhibit a strong interaction with adsorbed NO2 molecules, which enhances their selectivity for nitrogen production. The development of MOF-based catalysts with atomically dispersed metal sites opens up new opportunities for designing highly efficient and cost-effective catalysts for various catalytic applications. In particular, the Cu-MOF catalyst has great potential for mitigating NO2 pollution and improving air quality Copper scrap buying Copper scrap buyer
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