Boron‐Tethering and Regulative Electronic States Around Iridium Species for Hydrogen Evolution

Abstract

The performance of single-atom electrocatalysts usually suffers from attenuation due to high energy states, especially in harsh environments. Therefore, as high-efficiency electrocatalysts for hydrogen reduction reaction (HER), supported metal nanoclusters (NCs) with maximum metal atom efficiency are promising, yet the genuine mechanism involving rational orbital modulation is still arguable. Herein, the conjugating effect between electron-donor boron (B)-tethering engineering and iridium (Ir) that facilitates the electron capture of Ir atoms is explored, achieving highly dispersive Ir-NCs confined in N, B co-doped defective carbon

Realizing high performance bifunctional energy storage devices and electrocatalytic water splitting catalysts through regulated interface engineering of ZnCo2O4@Co3O4 nanosheets

“…And the contribution of nickel foam to the performance is negligible. The Tafel slope was achieved by combining the LSV curve with the Tafel equation as follows: 38,39 η = a + b log j where η is the overpotential, a is a constant value, b is the Tafel slope, and j is the current density. The kinetics of electron transfer on the catalyst surface during the HER was studied using the Tafel slope.…”

Acidic oxygen evolution reaction: Mechanism, catalyst classification, and enhancement strategies

“…Carbon materials have a large specific surface area, low cost, and good electrical conductivity, so they are widely used as substrate materials. [200,201] For example, N-doped graphene sheets can achieve effective anchoring of Ir nanoparticles on their surfaces. [202] The theoretical calculation results showed that the introduction of N F I G U R E 14 Strategies to improving the stability of catalysts effectively reduced the adhesion energy of the graphene substrate to the Ir clusters.…”

Recent progress in the development of single-atom electrocatalysts for highly efficient hydrogen evolution reactions

“…In this section, the relationship between the evolution of the coordination environment surrounding the active metal sites and the HER performance will be further discussed. 65,84,[87][88][89][90][91] Aiming to convincingly design prominent SACs for the HER, a range of rational strategies to construct active centers and adjust the coordination configuration has been proposed, which includes tuning doping heteroatoms, 92,93 organic ligands, 94 optimizing mass loading 95,96 and defect engineering, 97 etc. In consideration of the electrocatalytic activity and cost, SACs towards the HER can be divided into precious metal active centers (Pt, Ru, Ir, Rh, etc.)…”