Cathodized copper porphyrin metal–organic framework nanosheets for selective formate and acetate production from CO₂ electroreduction

Abstract

Highly selective and effective formate and acetate production from CO2 electroreduction on cathodized metal–organic framework nanosheets.

Bi‐Based Metal‐Organic Framework Derived Leafy Bismuth Nanosheets for Carbon Dioxide Electroreduction

“…Electrochemical reduction of CO 2 to valuable chemical feedstocks or fuels using renewable electricity contributes to closing the artificial carbon cycle. [ 1 ] The sophisticated multi‐electron transfer process leads to a multitude of possible CO 2 reduction products ranging from C 1 (CH 4 , [ 2 ] CO, [ 3 ] HCOOH [ 4 ] ) to C 2+ (C 2 H 5 OH, [ 5 ] CH 3 COOH, [ 6 ] C 2 H 4 , [ 7a,b ] C 2 H 6 , [ 7c ] and CH 3 CH 2 CH 2 OH [ 5 ] ) productions, especially for copper‐based catalysts. [ 7d ] Even though the C 2+ products possess higher industrial values, [ 8 ] CO 2 electroreduction to C 2+ products in industrial level remains a substantial challenge due to its low selectivity and sluggish reaction pathway, eventually resulting in high production cost.…”

Two-dimensional metal-organic frameworks for energy-related electrocatalytic applications

“…Sun et al [11] have used density functional theory to propose a 2D MOF-based on molybdenum for NRR. With highly ordered structure and exposed metal active sites, the Mo-based MOF could exhibit an excellent catalytic performance for the conversion of N 2 into NH 3 at room temperature with a very low overpotential of 0.18 V. Further, Wu et al [20] have demonstrated copper porphyrin metal-organic framework nanosheets as highly selective and efficient electrocatalysts for the electroreduction of CO 2 to formate and acetate (CO 2 RR), with a maximum faradaic efficiency of 61.5% and 12.3% respectively. The authors attribute the efficiency of the electrocatalyst to its flat and high-aspect-ratio which promoted electron transfer and reduced the diffusion kinetic barrier, confirming that MOF downsizing is a feasible method for the further improvement of 2D nanosheet conductivity.…”

Engineering Metal–Organic Frameworks for the Electrochemical Reduction of CO2: A Minireview

“… Electron micrographs of MOFs that have been used as catalyst supports: a) SEM and b) TEM images of Cu 2 (CuTCPP) nanosheets . c) Top‐down and d) cross‐sectional SEM images of a Cu‐SIM NU‐1000 thin film .…”

“…Wu et al. used porphyrinic MOF nanosheets to promote the CO 2 ER . The Cu 2 (CuTCPP) nanosheets were cathodized onto FTO glass and exhibited significant activity for the production of formate, with a FE of 68.4 % at −1.55 V (vs. Ag/Ag + ).…”