Dual-metal atom incorporated N-doped graphenes as oxygen evolution reaction electrocatalysts: high activities achieved by site synergies

Abstract

Cheap and highly efficient electrocatalysts are needed to expedite the sluggish oxygen evolution reaction (OER) in water electrolysis to provide clean and sustainable hydrogen energy. In this work, systematic first-principles...

Single–atom catalysts based on Fenton-like/peroxymonosulfate system for water purification: design and synthesis principle, performance regulation and catalytic mechanism

“…[106][107][108][109][110] At present, the widely studied active centers (e.g., M-Cx, M-Nx and M-N-C) are composed of transition metal species interacting with heteroatoms in ligands in the form of covalent or ionic bonds. 111,112 Importantly, the existence of coordination atoms, especially the electrostatic interaction between anchored non-metallic atoms and transition metal elements, prevents the agglomeration trend of isolated metal elements, thus improving the chemical and structural stability of Fenton-like SACs. Moreover, the electronic properties and geometry of transition metal reaction centers are mainly determined by the local coordination chemistry, which is owing to the coupling effect of the charge density in the center of the metal element regulated by the anchor donor.…”

In Situ Construction of MnO2–Co3O4 Nanosheet Heterojunctions on Co@NCNT Surfaces for Oxygen Evolution

“…11,12 Thereby, great efforts have been made to develop non-noble metal electrocatalysts with high activity, low cost, and high stability. 13 In the midst of OER catalysts, transition-metal oxides (such as Co 3 O 4 , MnO 2 , NiCo 2 O 4 , and so forth) are excellent OER catalysts. 14−17 Simultaneously, the preferable stability of transition-metal oxides has turned into a research hotspot of OER catalysts in recent years.…”

Robust Th-MOF-Supported Semirigid Single-Metal-Site Catalyst for an Efficient Acidic Oxygen Evolution Reaction

“…The electrocatalytic oxygen evolution reaction (OER) is a crucial electrochemical process in energy conversion and storage devices, such as an overall water electrolyzer. − The OER was generally operated under three medium: acidic, neutral, and alkaline electrolytes. Among them, both neutral and alkaline water electrolyzer are limited by the electrolyte conductivity, thus just giving a weak current density of less than 0.5 A cm –2 ; by contrast, acidic media in a proton exchange membrane electrolyzer would enable a high current density up to 3 A cm –2 , benefiting to the outcome of high-pressure H 2 (10 MPa) .…”