Self-exfoliating\nBimetallic Metal–Organic Framework\nLayer with Intralayer π–π Interactions for Efficient\nElectrical Transport and CO<sub>2</sub> Electroreduction

Two-dimensional\nmetal–organic frameworks (2D MOF)\nhave attracted\ngreat attention in the electrocatalytic reduction of CO<sub>2</sub> owing to their well-defined structure and high surface area. Nevertheless,\nhow to combine accessible metal active sites with high electron transfer\nstill poses challenges in structural assembly. Herein, two-dimensional\nAgCe-MOFs with intralayer π–π stacking interactions\nwere assembled by linking one-dimensional Ce–O chains to Ag(I).\nIts nanosheet can be facilely prepared via self-exfoliation upon the\nloss of uncoordinated interlayer acetonitrile. The 2D AgCe-MOF nanosheets’\nmerits of more exposed active sites and efficient electron transfer\nchannels have displayed outstanding electrochemical performance and\n99.5% selectivity in electrocatalytic CO<sub>2</sub> reduction to\nCO. The establishment of efficient electrical transport channels and\nhigh exposure of catalytic sites in a framework through designed supramolecular\ninteractions is expected to be a potential strategy for the construction\nof efficient electrocatalysts.