The Key Steps and Distinct Performance Trends of Pyrrolic vs Pyridinic M–N–C Catalysts in Electrocatalytic Nitrate Reduction - Qiuling Jiang; Mingyao Gu; Shen Pei; Tianyi Wang; Fangzhou Liu; Xin Yang; Di Zhang; Zhijian Wu; Ying Wang; Li Wei; Hao Li (Journal of the American Chemical Society, 2025)