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AssigneeInstitute of Process Engineering, Chinese Academy of Sciences
InventorsTingyu ZHU, Wenqing XU, Huixian LIU, Yixi WANG, Chaoqun LI
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A single-atom catalyst with molecular sieve-confined domains and a preparation method and application thereof are provided in the present disclosure. According to the present disclosure, the physical structure and chemical anchoring action of the molecular sieve are utilized to confine the bimetallic ions, so that the bimetallic ions of the catalyst are dispersed in single atoms, electrons in the bimetallic ions are transferred from transition metals to precious metals to promote d-π* orbital hybridization to enhance NO adsorption, and an electron-rich environment and sufficient active sites are provided for NO adsorption and dissociation in the CO-SCR reaction; the transition metals adsorb CO to promote the transformation of N2O, NO2 and other intermediates into N2, and the transition metal serves as a sacrificial site for the poisoning of SO2 to enhance the sulphur-resistant property of the catalyst.
A single-atom catalyst with molecular sieve-confined domains, wherein the single-atom catalyst takes a molecular sieve as a carrier and bimetallic ions as active components, and the bimetallic ions are confined in the physical structure of the molecular sieve by utilizing a physical structure and a chemical anchoring action of the molecular sieve.
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