Metalloporphyrin-mediated biomass porous single- and dual-metal M-N-C catalysts with 3<i>d</i>, 4<i>d</i> and 5<i>d</i> electrons for efficient electrocatalyzed nitrogen reductions

A series of reed-straw-derived, metalloporphyrin-mediated porous single- and dual-metal M-N-C catalysts were prepared and characterized. Importantly, the synthetic M-N-C catalysts with 3d, 4d and 5d electrons have enhanced and tunable electrochemically catalyzed nitrogen reduction activities. In particular, the dual-metal M-N-C catalyst FePdTPP@RSC-800 with 5d electrons exhibits the satisfied ammonia yield (E = -0.3 V, 17.6 μg·mg −1 ·h −1 ) and Faraday Efficiency (15.1%). These results provide an opportunity to further explore the efficient electrochemical synthesis of NH 3 from M-N-C materials in the future.