Shaping catalysts into tiny cones allows them to use concentrated electric fields to turn CO2 into alcohol.
April 23, 2026
Original Paper
Beyond molecular dispersion: A molecular-cone architecture of cobalt phthalocyanine on CNTs for selective CO2 electroreduction to methanol
SSRN · 6618540
The Takeaway
Converting carbon dioxide into useful fuels like methanol usually requires complex and expensive chemical setups. This new architecture arranges cobalt molecules into cones on the surface of carbon nanotubes. The sharp tips of these cones amplify the local electric field, attracting specific ions that stabilize the reaction. This geometric trick makes the process far more efficient and selective than using a flat surface. It moves chemical engineering away from just using different elements and toward using specific shapes. This could lead to industrial-scale systems that scrub CO2 from the air and turn it into liquid energy.
From the abstract
Molecularly dispersed cobalt phthalocyanine (CoPc) on carbon nanotubes acts as an efficient catalyst for electrochemical CO2-to-methanol conversion. However, increasing the CoPc loading to enhance current density typically induces aggregation, which compromises methanol selectivity. To overcome this limitation, we developed a nitro‐substituted CoPc supported on CNTs (nCoPc@CNT) that adopts a distinct molecular‐cone configuration, differing from both molecularly dispersed and aggregated structure