A self-supported S-doped Fe-based organic framework platform enhances electrocatalysis toward highly efficient oxygen evolution in alkaline media

Abstract

The oxygen evolution reaction (OER) is a great crucial half-reaction in many energy conversion and storage techniques to alleviate the problem of energy crisis and environmental pollution. However, the development...

Exploration and Application of the Self-Optimization Phenomenon of a Trimetal-Based MOF Electrocatalyst in the Oxygen Evolution Reaction

“…Metal–organic frameworks (MOFs), as a material with the advantages of a high specific surface area, rich pore structure, abundant and diverse components, and well-defined metal centers, have received widespread attention in the field of electrocatalysis. , However, MOFs also have some disadvantages, such as the low conductivity and low mass permeability caused by the inherent insulation of organic ligands, which limits their direct application as an electrocatalyst in OER. − Directly loading MOFs on conductive substrates is a feasible method to improve the conductivity. The conductive substrates can not only significantly improve the conductivity but also provide templates for the growth of MOFs, reducing the agglomeration of MOFs in the growth process. , For example, Chen et al successfully constructed a self-supported NiCoZnP/NC nanosheet array on carbon cloth (CC), avoiding the use of a binder, significantly reducing contact resistance and exhibiting super hydrophilic properties .…”

Metal–Organic-Framework-Based Nanoarrays for Oxygen Evolution Electrocatalysis

“…The inductance plasma mass spectrometry detection of Fe species released during the electrochemical process showed that the S atom inhibited the escape of Fe active species and effectively enhanced the stability of S 0.05 -Fe-BTB/NF. 168 The introduction of vacancy in MOF materials by doping of halogen elements has been used for electrocatalysis. 169 The Cl atom was reduced to chlorine gas at a positive potential, resulting in a vacancy that exposed active sites.…”

“…X-ray photoelectron spectroscopy (XPS) results showed that the coordination environment of the active center changes after the introduction of the S atom, which effectively regulates the electronic properties of the active center and promotes OER activity. The inductance plasma mass spectrometry detection of Fe species released during the electrochemical process showed that the S atom inhibited the escape of Fe active species and effectively enhanced the stability of S 0.05 -Fe-BTB/NF …”

Multi-metallic Metal–Organic Framework Nanosheets with 3D Flower-like Nanostructure-Based Natural Seawater Splitting toward Stable Industrial-Scale Current Density

“…Over the past decade, metal–organic frameworks (MOFs) have been widely studied as an emerging class of crystalline porous framework materials with a large specific surface area, ultrahigh porosity, tunable pore sizes, chemical components, and morphology. – Furthermore, due to the abundance of well-dispersed metal active sites, MOFs have received intensively increasing attention as a promising platform for electrocatalytic applications. – Unfortunately, due to poor electrical conductivity, pristine MOFs’ electrocatalytic activities and durability are unsatisfactory for large-scale applications. , To further improve the activity, rational modification of the components of the MOFs and their hybridization with conductive materials such as conductive polymers and graphene have been demonstrated as a prospective strategy. , In this context, the electronic properties of the well-dispersed metal active sites can be altered by incorporating the foreign metals into the MOF matrix. – However, to the best of our knowledge, no studies have been reported on multimetallic-based MOFs for electrochemical seawater electrolysis.…”