Atomically dispersed Ni-N-C catalyst derived from NiZn layered double hydroxides for efficient electrochemical CO2 reduction

Atomically dispersed catalytic metal sites anchored on N-doped carbon support catalysts (M-N-C) show great prospects for CO2 electroreduction. Here, single-layer NiZn layered double hydroxides (NiZn-LDHs) was used as a sacrificial assistant to fabricate single-Ni atom ultrathin porous catalyst. NiZn-LDHs were exfoliated by polyhydroxy compounds which took the resource in Ni-N-C, and single layer LDHs taking Ni could avoid agglomeration of atoms during calcining. The CO Faradaic efficiency (FECO) synthesized Ni-N-C catalyst exceeded 90% at −0.6 −1.0 V FECO 95.2% with current density 24 mA cm−2 −0.9 V. This work not only provides new method preparing M-N-C catalysts, but also offers an effective controllable strategy large-scale production high-performance single-atom catalysts.