A MOFs/semiconductor biomimetic interface was established for PEC CO2 reduction.
ZIF9 as a “stoma” for CO2 fixation and activation was in-situ grew on Co3O4 NWs.
CO2 has been PEC reduced to formate with high yield at a low overpotential.
Rapid electron transfer was achieved by p-p heterojunction between Co3O4 and ZIF9.