In 1.0 M KOH, CoP–CeO₂ nanosheets film on Ti mesh (CoP–CeO₂/Ti) attains 10 mA cm⁻² at overpotential of 43 mV due to its lower water dissociation free energy and more optimal hydrogen adsorption free energy than CoP.

Active and highly stable electrocatalysts for oxygen evolution reaction (OER) in acidic media are currently in high demand as a cleaner alternative to the combustion of fossil fuels. Herein, we report a Co-doped nanorod-like RuO2 electrocatalyst with an abundance of oxygen vacancies achieved through the facile, one-step annealing of a Ru-exchanged ZIF-67 derivative. The compound exhibits ultra-high OER performance in acidic media, with a low overpotential of 169 mV at 10 mA cm-2 while maintaining excellent activity, even when exposed to a 50-h galvanostatic stability test at a constant current of 10 mA cm-2. The dramatic enhancement in OER performance is mainly attributed to the abundance of oxygen vacancies and modulated electronic structure of the Co-doped RuO2 that rely on a vacancy-related lattice oxygen oxidation mechanism (LOM) rather than adsorbate evolution reaction mechanism (AEM), as revealed and supported by experimental characterizations as well as density functional theory (DFT) calculations.

The ultralow-Pt-content (Pt content: 5.1 wt%) Ni(OH) ₂ –PtO ₂ hybrid nanoarray behaves as a superb and durable electrocatalyst for alkaline hydrogen evolution.

Two hypothetical M₂C MXenes (Mn₂C and Fe₂C) are predict to exhibit the lowest limiting potential in NRR among all the 3d, 4d and 5d-TM MXenes considered due to the spin-split d orbital rule in electron donation and back donation in TM-N₂ interaction.

A platinum oxide decorated amorphous cobalt oxide hydroxide nanosheet array has been prepared and used for alkaline hydrogen evolution.

PtO₂–Co(OH)F nanoarray exhibits superior alkaline HER activity due to its favorable composition and structure.