Cobalt Nanoparticle-Embedded Nitrogen-Doped Carbon Catalyst Derived from a Solid-State Metal-Organic Framework Complex for OER and HER Electrocatalysis

Electrochemical water splitting is considered a promising way of producing hydrogen and oxygen for various electrochemical energy devices. An efficient single, bi-functional electrocatalyst that can perform evolution reactions (HERs) (OERs) highly essential. In this work, Co@NC core-shell nanoparticles were synthesized via simple, eco-friendly, solid-state synthesis process, using cobalt nitrate with pyrazole as the N C source. The morphological analysis resulting was performed scanning transmission electron microscope, which showed Co core pyrolysis organic ligand N-doped carbon derived shell structure. unique nanostructures had excellent redox sites electrocatalysis, wherein exhibited superior electronic conductivity in catalyst. nanocatalyst considerable HER OER activity an alkaline medium. catalyst HERs overpotentials 243 170 mV at 10 mA∙cm−2 on glassy Ni foam electrodes, respectively, whereas OERs 450 452 current density 50 electrode foam, respectively. Moreover, also admirable durability