Recent Progress on Transition Metal Based Layered Double Hydroxides Tailored for Oxygen Electrode Reactions

Abstract

The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), namely, so-called oxygen electrode reactions, are two fundamental half-cell reactions in the energy storage and conversion devices, e.g., zinc–air batteries and fuel cells. However, the oxygen electrode reactions suffer from sluggish kinetics, large overpotential and complicated reaction paths, and thus require efficient and stable electrocatalysts. Transition-metal-based layered double hydroxides (LDHs) and their derivatives have displayed excellent catalytic performance, suggesting a major contribution to accelerate electrochemical reactions. The rational regulation of electronic structure, defects, and coordination environment of active sites via various functionalized strategies, including tuning the chemical composition, structural architecture, and topotactic transformation process of LDHs precursors, has a great influence on the resulting electrocatalytic behavior. In addition, an in-depth understanding of the structural performance and chemical-composition-performance relationships of LDHs-based electrocatalysts can promote further rational design and optimization of high-performance electrocatalysts. Finally, prospects for the design of efficient and stable LDHs-based materials, for mass-production and large-scale application in practice, are discussed.

Biomass Carbon Anchored Co‐N4 Single‐Atom Catalyst for Efficient Hydrogen Evolution, Oxygen Evolution and Alcohol Oxidation Reaction

“…Nowadays, the scientists discover that some transition-metal-based materials are potential substitutes for Pt-based catalysts for their low cost and high catalytic activity. [15][16][17] However, the transition-metalbased materials usually have low conductivity and poor stability in acid or alkaline conditions significantly impair their electrochemical performance during the process of electrocatalysis. [18][19][20] To solve this issue, one successful strategy is the hybridization of the transition-metal nanomaterials with carbon-based conductive materials.…”

“…Although Pt‐based materials usually possess the best electrochemical catalytic activity, the scarcity and towering cost hamper their widespread application. Nowadays, the scientists discover that some transition‐metal‐based materials are potential substitutes for Pt‐based catalysts for their low cost and high catalytic activity [15–17] . However, the transition‐metal‐based materials usually have low conductivity and poor stability in acid or alkaline conditions significantly impair their electrochemical performance during the process of electrocatalysis [18–20] .…”

Facile Synthesis of Sulfate-Intercalated CoFe LDH Nanosheets Derived from Two-Dimensional ZIF-9(III) for Promoted Oxygen Evolution Reaction

“…Transition-metal (e.g., Co, Fe and Ni) layered double hydroxides (LDH) have emerged as promising electrocatalysts for OER because of their flexible open layer structures, tunable chemical composition, and cost effectiveness [4][5][6]. In particular, the OER activity of bimetallic CoFe LDH is dramatically improved compared to the individual Co and Fe components due to the modulated electronic structures, enhanced charge transfer, and synergistic interactions between Co and Fe [7,8].…”

Peach Gum‐Derived S,N Co‐Doped Nanoporous Carbon Coupled with Layered Double (Ni, Fe) Hydroxide for Efficient Bifunctional Oxygen Electrocatalysis in Zn‐Air Batteries

“…However, the poor electro‐transport kinetics, easily stacking of the material and low electrocatalytic activity of ORR prevent them from widely applying in advanced ZABs. Consequently, integrating layered transition metal (oxy)hydroxides with heteroatoms‐doped carbon can endow the hybrids with remarkably bifunctional oxygen electrocatalytic activities and outstanding performances of ZABs [11a,12] . The cost‐effective and simple preparation approach for rationally designing bifunctional electroactive sites for ORR and OER is tricky yet and remains challenging.…”