Preparation of Nitrogen-Doped Carbon Fiber Supported Nickel-Cobalt Selenides for Electrocatalytic Hydrogen Evolution Performance

Nitrogen⁃doped carbon fiber (NCF) loaded bimetal selenide nanoparticle material ((Ni,Co)Se₂/NCF) was synthesized by calcination and selenium treatment using electrospun fibers as the precursor. A series of related characterization was carried out, and the hydrogen evolution properties of the materials were studied under acidic and alkaline conditions. (Ni,Co)Se₂ nanoparticles were anchored in NCF, which effectively prevents the aggregation of nanoparticles and provides more catalytic active sites. The electrocatalytic hydrogen evolution test results showed that in 1 mol·L^-1 KOH solution, the overpotential of (Ni,Co)Se₂/NCF was 123.3 mV at the current density of 10 mA·cm^-2, and the Tafel slope was 144.0 mV·dec^-1. In 0.5 mol·L^-1 H₂SO₄ solution, the overpotential of hydrogen evolution required for (Ni,Co)Se₂/NCF to reach the current density of 10 mA·cm^-2 was 95.5 mV, and the Tafel slope was 115.2 mV·dec^-1, indicating excellent electrocatalytic hydrogen evolution performance.