Oxygen defects-engineered LaFeO3-x nanosheets as efficient electrocatalysts for lithium-oxygen battery

Synergy of Oxygen-Deficient LaFeO3−δ and N-Doped Reduced Graphene Oxide in Oxygen Reduction Reaction in Alkaline Solutions

“…The synthesis method is an improvement based on the previous research of our group. 33 The details are as follows: 1 mmol Fe(NO 3 ) 3 •9H 2 O and 1 mmol La(NO 3 ) 3 •6H 2 O were dissolved in 15 mL of deionized water and then x mL of graphene oxide (GO, 10 mg mL −1 ) was added to the solution under vigorously magnetic stirring. Subsequently, 1 g of melamine powder, divided equally into five parts, was added to the above solution in batches, which was vigorously stirred for 12 h to allow GO to fully contact with melamine.…”

“…It can be also ascribed to oxygen vacancies, proper ionic mobility, and surface electron transfer that are facilitated by Zn 2+ doping . Even so, of most bulk perovskite oxides, the inferior electrical conductivity ,, and weak adsorption capacity to oxygen species , at room temperature still restrict their oxygen electrocatalytic performance. More specifically, the high adsorption energy barrier is not conducive to the formation of active surface adsorbate intermediates of OOH* species.…”

Atomically Dispersed Transition Metal-Nitrogen-Carbon Bifunctional Oxygen Electrocatalysts for Zinc-Air Batteries: Recent Advances and Future Perspectives

“…As earth-abundant and low-cost alternatives to noble metalbased electrocatalysts, transition metal (TM)-based materials and carbon-based materials have recently attracted extensive research attention [17,[31][32][33][34][35][36][37][38]. Developing effective strategies (e.g., surface functionalization, structure engineering, heteroatoms doping, and creating defect) to improve their intrinsic activity and increase exposed effective active sites play a vital role in boosting their bifunctional activity and stability [31,[39][40][41][42][43][44]. TM oxides or hydroxides are reported to be one of the most effective OER electrocatalysts, exhibiting a higher current density and better stability compared with metal-free carbon materials [45,46].…”

Defect Engineering of Carbon‐based Electrocatalysts for Rechargeable Zinc‐air Batteries

“…And studies are mainly focused on the following aspects: 1) increasing the number of the exposed active sites; 2) improving mass transfer and reaction kinetics by optimizing the hierarchical porous structure; 3) designing robust electrocatalysts with high electrochemical stability. [19][20][21][22] Carbon nanomaterials, including 0D (e. g., fullerene), 1D (e. g., carbon nanotubes (CNTs)), 2D (e. g., graphene) and 3D porous carbon nanostructures, have been widely reported. [23][24] Defect engineering of carbons, such as the modification of the electronic structure and surface chemical state of the carbon skeleton, is an effective strategy to further improve their electrochemical performance.…”

“…To date, tremendous efforts have been made for the development of carbon‐based materials. And studies are mainly focused on the following aspects: 1) increasing the number of the exposed active sites; 2) improving mass transfer and reaction kinetics by optimizing the hierarchical porous structure; 3) designing robust electrocatalysts with high electrochemical stability [19–22] . Carbon nanomaterials, including 0D (e. g., fullerene), 1D (e. g., carbon nanotubes (CNTs)), 2D (e. g., graphene) and 3D porous carbon nanostructures, have been widely reported [23–24] .…”