Preparation and study of tungsten carbide catalyst synergistically codoped with Fe and nitrogen for oxygen reduction reaction

Hydrogel-Derived Co3ZnC/Co Nanoparticles with Heterojunctions Supported on N-Doped Porous Carbon and Carbon Nanotubes for the Highly Efficient Oxygen Reduction Reaction in Zn–Air Batteries

“…However, the nonporous structure of CoNC (Figure f) impedes the diffusion of ORR-related species, hence giving rise to its smallest J L in the LSV curve . Generally, the J L of the ORR catalyst is mainly affected by its conductivity and pore volume. , Despite the lower value of i D / i G and higher conductivity (Figure c), the smaller pore volume of CoNC poses a huge negative effect on its J L .…”