Recent progress on low-temperature selective catalytic reduction of NOx by NH3 based on MOF-derived materials: a review

Abstract

Selective catalytic reduction of nitrogen oxides (NO_x) using ammonia (NH₃) is an effective method to reduce NO_x emissions from stationary and mobile sources. In this paper, the research progress of metal–organic framework (MOF) derivatives in NH₃-Selective Catalytic Reduction (SCR) reactions in recent years is summarized, focusing on three major aspects, namely, the synthesis of MOF derivatives, the reaction mechanism, and the application of MOF derivatives in NH₃-SCR reactions. In terms of the synthesis of MOF derivatives, various synthesis methods to improve the MOF materials and thus the performance of SCR reactions are systematically reviewed. In the context of reaction mechanisms, this review examines the designed and modified MOF derivatives to enhance the catalytic activity, adsorption capacity, and tolerance of the NH₃-SCR process. Furthermore, this review provides a comparative analysis of the catalytic efficiency and poison resistance of metallic, carbon-based, and composite derivatives, with particular emphasis on their deNOx performance, anti-toxicity characteristics, and thermal stability. Finally, the future development potential and directions of MOF derivative catalysts in NH₃-SCR reactions are explored.