Two-dimensional metal–organic frameworks as efficient electrocatalysts for bifunctional oxygen evolution/reduction reactions

Abstract

With the continuous development of sustainable and renewable energy, the electrocatalytic water cycle and rechargeable metal-air batteries are attracting increasing attention. As two main reactions, oxygen evolution/reduction reaction (OER/ORR) are...

Bifunctional electrocatalytic activity of Fe-embedded biphenylene for oxygen reduction and evolution reactions

“…In general, the farther the d-band center is from the Fermi energy, the weaker the adsorption of the intermediates on the catalyst is. [27][28][29] As shown in Fig. 5, the d-band center of FeN 4 -biphenylene is closer to the Fermi energy than the ones of CoN 4 -biphenylene and NiN 4 -biphenylene.…”

Defect-Rich, Rose-Shaped Fe2Ni1-Metal–Organic Framework Nanoarrays for Efficient Oxygen Evolution Reaction

“…As a star material, the controllable pore size, large specific surface area, dispersed active sites, and diverse topology of metal–organic frameworks (MOF) composed of organic ligands and metal nodes, especially Ni, Fe, Co, etc., endow MOF with outstanding electrocatalytic properties. , However, the poor electrical conductivity and low availability of active sites have been the existing problems of MOF as electrocatalytic materials. , To address these shortcomings for efficient overall water splitting, the crystal structure of MOF acts as a key factor in measuring the electrocatalytic performance. The modulation of the crystal structure and coordination environment of metal–organic frameworks is a straightforward and essential way to reduce the energy barrier and impedance of the electrocatalyst reaction. , Generally, there are three ways to regulate the intrinsic electronic structure of MOF based on both metal clusters and ligands: (1) doping the second and third metals to partially replace the initial metal sites; (2) introducing missing linkers to compete with the original organic ligand; (3) the addition of a regulator to introduce defects.…”

“…1,3,8−10 As a star material, the controllable pore size, large specific surface area, dispersed active sites, and diverse topology of metal−organic frameworks (MOF) composed of organic ligands and metal nodes, especially Ni, Fe, Co, etc., 11 endow MOF with outstanding electrocatalytic properties. 12,13 However, the poor electrical conductivity and low availability of active sites have been the existing problems of MOF as electrocatalytic materials. 7,14 To address these shortcomings for efficient overall water splitting, the crystal structure of MOF acts as a key factor in measuring the electrocatalytic performance.…”

Molecular design and coordination regulation of atomically dispersed bi-functional catalysts for oxygen electrocatalysis

“…It is worth noting that the regulation strategies and scientic principles of atomically dispersed electrocatalysts are similar for different catalytic reactions, although targeted designs for different reaction mechanisms are required. [14][15][16] Based on the above considerations, we take the ORR and OER in the oxygen electrocatalysis reaction as an example, trying to illustrate the possibility of atomically dispersed catalysts based on different support materials being applied to the conversion reaction and realizing the modulation of the intrinsic activity. 17 In detail, the design of atomically dispersed catalysts should be based on the electrocatalytic reaction mechanism.…”