School of Chemistry and Chemical Engineering Mongolia Engineering and Technology Research Center for Catalytic Conversion and Utilization of Carbon Resource Molecules&Inner Mongolia Key Lab of Nanoscience and Nanotechnology Mongolia University 010020 Mongolia;
Department of Mechanical Engineering University of Hong Kong Kong 999077;
Single cobalt atoms; Nitrogen-doped carbon nanotubes; Vanadium nitride nanodots; Cobalt nanoparticles; Hydrogen evolution reaction;