Fuertes, Synthetic approaches in oxynitride chemistry. Zhang, 3 D porous nickel–cobalt nitrides supported on nickel foam as efficient electrocatalysts for overall water splitting. Chen, Self-supported cobalt nickel nitride nanowires electrode for overall electrochemical water splitting. Wang, Nanoparticle-stacked porous nickel-iron nitride nanosheet: a highly efficient bifunctional electrocatalyst for overall water splitting. Fan, Rapid synthesis of cobalt nitride nanowires: highly efficient and low-cost catalysts for oxygen evolution. Xie, Metallic Co4N porous nanowire arrays activated by surface oxidation as electrocatalysts for the oxygen evolution reaction. Xie, Metallic nickel nitride nanosheets realizing enhanced electrochemical water oxidation. Yang, Holey sheets of interconnected carbon-coated nickel nitride nanoparticles as highly active and durable oxygen evolution electrocatalysts. Yang, Ordered mesoporous cobalt–nickel nitride prepared by nanocasting for oxygen evolution reaction electrocatalysis. Yamauchi, Mesoporous semimetallic conductors: structural and electronic properties of cobalt phosphide systems. Luo, Hierarchical NiFeP microflowers directly grown on Ni foam for efficient electrocatalytic oxygen evolution. Shao-Horn, A perovskite oxide optimized for oxygen evolution catalysis from molecular orbital principles. Yu, Metallic transition metal selenide holey nanosheets for efficient oxygen evolution electrocatalysis. Lei, Porous cobalt oxynitride nanosheets for efficient electrocatalytic water oxidation. Sun, Interfacing nickel nitride and nickel boosts both electrocatalytic hydrogen evolution and oxidation reactions. Xi, FeS2/CoS2 interface nanosheets as efficient bifunctional electrocatalyst for overall water splitting. Ranga Rao, Hierarchically organized NiCo2O4 microflowers anchored on multiwalled carbon nanotubes: efficient bifunctional electrocatalysts for oxygen and hydrogen evolution reactions. Jin, The effects of Al substitution and partial dissolution on ultrathin NiFeAl trinary layered double hydroxide nanosheets for oxygen evolution reaction in alkaline solution. Boettcher, Solution-cast metal oxide thin film electrocatalysts for oxygen evolution. Sargent, Homogeneously dispersed multimetal oxygen-evolving catalysts. Grätzel, Water photolysis at 12.3% efficiency via perovskite photovoltaics and Earth-abundant catalysts. Qiao, Design of electrocatalysts for oxygen- and hydrogen-involving energy conversion reactions. Jaramillo, A highly active and stable IrOx/SrIrO3 catalyst for the oxygen evolution reaction. Zhu, High-performance transition metal phosphide alloy catalyst for oxygen evolution reaction. Lee, Nanostructured materials on 3D nickel foam as electrocatalysts for water splitting. Ma, Preparation of new titanium oxy nitride based electro catalysts using an anhydrous sol-gel method for water electrolysis in acid medium. Yang, Mesoporous ternary nitrides of earth-abundant metals as oxygen evolution electrocatalyst. These values are lower than that of CrN (overpotential of 446 mV at 10 mA cm −2, and Tafel slope of 162 mV dec −1), and Cr 2O 3 (overpotential 477 mV and Tafel slope 210 mV dec −1). CrON nanoparticles exhibit an overpotential of 409 mV at a current density of 10 mA cm −2, with a Tafel slope of 157 mV dec −1, and offers good stability for over 12h in alkaline medium. CrON nanoparticles show superior OER electrocatalytic properties over its corresponding nitride (CrN) and oxide (Cr 2O 3) material. The study is also conducted with its corresponding nitride (chromium nitride (CrN)) and oxide phase (chromium oxide (Cr 2O 3)) to benchmark the OER performance of the oxynitride. In this work, we report chromium oxynitride (CrON) nanoparticles with spherical morphology, which are tested for electrocatalytic OER activity for the first time. However, chromium oxynitride is less explored as a catalyst for OER. Transition metal nitrides and oxynitrides are of particular interest in energy conversion and storage technologies due to its unique properties like metallic conductivity, wettability, durability, and chemical stability. Development of stable and efficient non-noble metal-based catalysts for oxygen evolution reactions (OERs) continues to pose a significant challenge owing to sluggish reaction kinetics (since it commonly involves four electron processes and O–O bond formation).
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