Electrochemical reduction of CO₂ (ECR-CO₂) into high value-added products plays a crucial role in energy conversions. Herein, we developed a family of porous metal-porphyrin triazine-based frameworks (MPTFs-x, M = Mn, Fe, Co, Ni, and Cu, x = temperature) with a specific surface area up to 977 m² g^-1 and homogenously dispersed transition-metals. Benefiting from a high content of N species of 8.43 at.% and abundantly exposed Ni-N_x active sites, NiPTFs-600 displayed a superb Faradaic efficiency (FE) of CO production (> 90%) in the range of -0.55 V to -0.95 V with the maximum FE of 97.6% and current density of 10.8 mA cm^-2 at -0.8 V. The reaction mechanism was found to be the adsorption of CO₂ molecules to form *CO₂ intermediates, accompanied by successive protonation to produce *COOH and then *CO.

将CO ₂（ECR-CO ₂）电化学还原为高附加值产品在能量转换中起着至关重要的作用。在此，我们开发了比表面积最大为977 m ²  g ^-1的多孔金属-卟啉三嗪基骨架（MPTFs-x，M = Mn，Fe，Co，Ni和Cu，x =温度）。和均匀分散的过渡金属。NiPTFs-600得益于高含量的8.43 at。％的N物种和大量暴露的Ni-N _x活性位，在-0.55 V至0.55 V的范围内显示出了极好的法拉第效率（FE），CO产生率（> 90％）。 -0.95 V，最大FE为97.6％，电流密度为10.8 mA cm ^-2在-0.8V下发现反应机理。该机理是吸附CO ₂分子以形成* CO ₂中间体，并伴随着连续质子化以生成* COOH，然后生成* CO。