Mechanistic insights into low-temperature NH3-SCR over Mn-based Zr-pillared montmorillonite (Mn/Zr-PILM): Synergistic catalysis revealed by experiments and DFT - Ziwen Zheng; Huaqing Xie; Zhenyu Yu; Bin Xiao; Qingbo Yu; Kun Wang; Jiabo Zhao; Haijian Xu; Rui Guo (Process Safety and Environmental Protection, 2026)