Single‐Site Metal–Organic Framework and Copper Foil Tandem Catalyst for Highly Selective CO₂ Electroreduction to C₂H₄

Abstract

Tandem catalysis is a promising way to break the limitation of linear scaling relationship for enhancing efficiency, and the desired tandem catalysts for electrochemical CO2 reduction reaction (CO2RR) are urgent to be developed. Here, a tandem electrocatalyst created by combining Cu foil (CF) with a single‐site Cu(II) metal–organic framework (MOF), named as Cu–MOF–CF, to realize improved electrochemical CO2RR performance, is reported. The Cu–MOF–CF shows suppression of CH4, great increase in C2H4 selectivity (48.6%), and partial current density of C2H4 at −1.11 V versus reversible hydrogen electrode. The outstanding performance of Cu–MOF–CF for CO2RR results from the improved microenvironment of the Cu active sites that inhibits CH4 production, more CO intermediate produced by single‐site Cu–MOF in situ for CF, and the enlarged active surface area by porous Cu–MOF. This work provides a strategy to combine MOFs with copper‐based electrocatalysts to establish high‐efficiency electrocatalytic CO2RR.

[W10O32]4−-based POMOFs with different nuclear cobalt clusters for photoreduction of CO2 to produce syngas

“…5b) belonged to COOH*, which was a key intermediate in the conversion of CO 2 to CO. The intensity of the COOH* peaks attributed to compounds 1 and 2 gradually increased with the extension of the time of light irradiation, indicating that CO 2 was continuously converted to CO. 54–59…”

“…5b) belonged to COOH*, which was a key intermediate in the conversion of CO 2 to CO. The intensity of the COOH* peaks attributed to compounds 1 and 2 gradually increased with the extension of the time of light irradiation, indicating that CO 2 was continuously converted to CO. [54][55][56][57][58][59] The energy level structure and the charge transfer mechanism of compounds 1 and 2 were inferred from the Mott-Schottky plots (Fig. 5c and d).…”

Metal‐Organic Frameworks (MOFs) and Their Derivatives for Electrocatalytic Carbon Dioxide (CO2) Reduction to Value‐added Chemicals: Recent Advances and New Challenges

“…[78] Moreover, in the past 2022, Yan and colleagues achieved the preparation of Cu-MOF-CF by growing Cu-MOF in situ on planar copper foil (CF) (Figure 6l). [77] The catalyst exhibited better performance for CO 2 RR, producing C 2 H 4 at 1.55 V RHE with an FE of 48.6%. The catalyst exhibited better performance for CO 2 RR, producing C 2 H 4 at 1.55 V RHE with an FE of 48.6%.…”

“…l) Schematic illustration of the preparation of Cu-MOF-CF and m) the main products of catalyzed by CF and Cu-MOF-CF, n-o) The free-energy profile and optimized configurations. Reproduced with permission [77]. Copyright 2022, Wiley-VCH.…”

Exploring the role of sandwich-type polyoxometalates in {K10(PW9O34)2M4(H2O)2}@PCN-222 (M = Mn, Ni, Zn) for electroreduction of CO2to CO

“…[6][7][8][9] Accordingly, lots of catalysts have been developed for ECR, including molecular electrocatalysts (metal carbonyls, covalent-organic frameworks, metal-organic frameworks), single-atom catalysts (SACs), etc. 6,[8][9][10][11] Polyoxometalates (POMs) are an outstanding class of metal oxide clusters composed of transition metal ions connected by oxygen. 12 Thanks to their rich and tunable molecular structure and electron-storage capability, POMs have received increasing attention in ECR.…”