The impact of catalyst structure and morphology on the catalytic performance in NH3-SCR reaction: A review

The increasing severity of nitrogen oxide (NOx) pollution has drawn significant attention to the development of novel and promising flue gas denitrification technologies. Among them, the selective catalytic reduction (SCR) technology has been widely applied in flue gas denitrification for coal-fired power plants, waste incineration facilities, steel mills and other industries. Developing novel catalysts with controllable structure and tailorable morphology is recognized as one of the most challenging strategies in environmental catalysis. From both macroand microscopic perspectives, this review summarizes the recent progress in the structure of NH3-SCR catalysts, with an emphasis on classification, synthesis methods, catalytic performance as well as structure-performance relationships, and the findings in the crystal morphology, along with the development trends related to SCR catalysts. This work can provide a guideline for optimizing SCR catalyst design and performance in different industrial fields.