Template-free synthesis of three-dimensional NiFe-LDH hollow microsphere with enhanced OER performance in alkaline media

In-situ optimizing the valence configuration of vanadium sites in NiV-LDH nanosheet arrays for enhanced hydrogen evolution reaction

“…Layered double hydroxides (LDHs), as the name suggests, are ionic lamellar compounds composed of a brucite-like layer with positive electric charge and a mezzanine area containing anions with charge compensation and solvent molecules, which have aroused the interest of many researchers due to its attractive advantages in energy conversion and storage [6 , 7] . In this system, Ni-based LDHs, one class of the most common and widely used catalyst materials, have been well known as the promising electrocatalysts for oxygen evolution reaction (OER) in alkaline conditions [8][9][10] , especially NiV-LDH, with excellent conductivity and abundant catalytic active sites [11] . However, owing to the sluggish HER kinetics and low intrinsic electron mobility, the hydrogen evolution activity of these LDHs is unsatisfactory in both alkaline and neutral https://doi.org/10.1016/j.jechem.2020.02.010 2095-4956/© 2020 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences.…”

A general bimetal-ion adsorption strategy to prepare nickel single atom catalysts anchored on graphene for efficient oxygen evolution reaction

“…To weaken covalent bonds (e.g., M −N and M −C) and accelerate the electron transfer during OER, the construction of SACs via metal-oxygen (M −O) coordination could remarkably eliminate the covalent bonds of metal atoms, originating from superior electronegativity of oxygen. However, the reasonable preparation and stabilization of the oxygen bond metal sites in single-atom state remained challenging for OER [29] .…”

Photocatalytic H2 Evolution from Ammonia Borane: Improvement of Charge Separation and Directional Charge Transmission

“…LDHs could be expressed by the general chemical formula 3 + represent metallic cations, and A nÀ represent the exchangeable interlayer anions. [26][27][28][29][30][31][32] The main structure of LDH is based on MO 6 octahedron shared by layered edges of brucite-like hydroxide layers, surrounded by oxo-bridges and hydroxy groups. [33,34] LDHs could be used as ideal photocatalysts because of their adjustable electronic structure, highly dispersed metal ions, exchangeable anions between layers and controllable topological transformation.…”

“…LDHs were widely used in environmental purification, energy storage, industrial catalysis and biomedicine. LDHs could be expressed by the general chemical formula [M 2+ 1‐ x M 3+ x (OH) 2 ] x+ (A x / n ) n − ⋅ mH 2 O, where M 2+ , M 3+ represent metallic cations, and A n − represent the exchangeable interlayer anions . The main structure of LDH is based on MO 6 octahedron shared by layered edges of brucite‐like hydroxide layers, surrounded by oxo‐bridges and hydroxy groups .…”