Electrochemical Exfoliation of Pillared‐Layer Metal–Organic Framework to Boost the Oxygen Evolution Reaction

Abstract

Tw o-dimensional (2D) materials and ultrathin nanosheets are advantageous for elevating the catalysis performance and elucidating the catalysis mechanism of heterogeneous catalysts,but they are mostly restricted to inorganic or organic materials based on covalent bonds.W er eport an electrochemical/chemical exfoliation strategy for synthesizing metal-organic 2D materials based on coordination bonds.A catechol functionalizedligand is used as the redox active pillar to construct apillared-layer framework. When the 3D pillaredlayer MOF serves as an electrocatalyst for water oxidation (pH 13), the pillar ligands can be oxidized in situ and removed. The remaining ultrathin (2 nm) nanosheets of the metalorganic layers are an efficient catalyst with overpotentials as low as 211 mV at 10 mA cm À2 and aturnover frequency as high as 30 s À1 at an overpotential of 300 mV.

State of the Art in Alcohol Sensing with 2D Materials

“…MOFs have shown unique competitive advantages over other inorganic peers when applied in constructions of flexible or transparent devices [138][139][140][141]. 2D MOFs can be synthesised through physical or chemical exfoliation of their bulk layered MOFs to form singlelayer or few-layer MOFs [142][143][144][145][146]. Bottom-up methods such as the coordination interaction between organic precursors and metal ions components have also been used to prepare 2D MOFs.…”

Facile electron delivery from graphene template to ultrathin metal-organic layers for boosting CO2 photoreduction

“…Nanosizing MOFs into ultrathin metal-organic layers (MOLs) can e ciently accelerate mass transport / electron transfer and create abundant readily accessible active sites to ensure high activity in various catalytic reactions. [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] Moreover, ultrathin MOFs with limited number of atoms represent ideal models to explore structure-performance relationships for further rationally constructing e cient catalysts at atomic/molecular levels. For example, a mono-carboxylic bipyridine ligand was utilized to assemble Re-/Mn-Ru molecules into monolayer Hf-based MOLs, 20 the resulting Re-Ru-based MOLs can sustainably reduce CO 2 to CO under real sunlight for one week.…”

CO2 controls the oriented growth of metal-organic framework with highly accessible active sites

“…However, the catalytic activities of MOFs are still largely restricted for the low-mass permeability, poor conductivity, and blockage of active metal centers by organic ligands 9 . Ultrathinning three-dimensional (3D) MOFs into twodimensional (2D) MOFs is an effective strategy to acquire highperformance catalysts because of the highly exposed active surfaces, superior electron transfer and facilitated mass transport of 2D MOFs [9][10][11][12][13][14][15] . Up to now, the methods for synthesizing 2D MOFs can be classified into two groups: top-down and bottomup strategies.…”