Adjusting the NiPc/GO ratio during the hydrolysis of protonated NiPc in the GO-assisted reaction enables the dispersion of Ni–N4–C active sites, forming a Ni(II)/Ni(III)/GO heterojunction with a FECO of 98.6% for the electrocatalytic CO2RR.
Recent progress on nickel phthalocyanine-based electrocatalysts is reviewed, focusing on their specific strategies, structure–performance relationship and CO2-to-CO reaction mechanism.
The relationship between support properties and CO2 electroreduction performance was elucidated. A series of N-doped porous carbons with varying porous structures and degrees of graphitization were prepared to support single atomic Ni–N4 sites.
Ni-phthalocyanine-based covalent-organic framework linked by imidazole group exhibits brilliant stability and high activity of CO2 electroreduction reaction with over 90% CO Faradic efficiency in full pH range.
A sulfur-doped carbon nanotube-supported nickel phthalocyanine electrode is presented, which can achieve concurrent activation of CO2 and H2O, boosting electrochemical reduction of CO2 to CO.