Eco‐Friendly Synthesis of Cobalt Phthalocyanine for High‐Efficiency CO2CO₂ Electroreduction

We report a sustainable and cost‐effective synthesis of cobalt phthalocyanine (CoPc) using low‐impact solvents and a streamlined purification procedure, achieving an 85% yield with limited waste generation, as indicated by an environmental factor (E‐factor) of 18.6. This route provides an eco‐friendly approach to producing a molecular electrocatalyst for reduction. The catalytic activity of the synthesized CoPc is validated by its integration into a gas diffusion electrode with carbon nanotube supports, exhibiting methanol production with a Faradaic efficiency up to 12%, matching the values reached with the conventionally synthesized counterparts. Notably, under high loading (micrometric crystallites of CoPc), ‐to‐CO conversion reached 65%, in fair alignment with literature benchmarks. Our work shows that green synthesis can yield high‐performance catalysts for electrochemical reduction (), enabling sustainable methanol production.