Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
a) The scheme showing the synthesis of Ni3N1− x/NF by subjecting Ni foam to the nitrogen plasma initiated by microwave, and the hydrogen evolution process enhanced by the presence of nitrogen vacancies. Blue: Ni atom, and green: N atom. SEM images of b) untreated Ni foam and c) Ni foam treated at N2 plasma. d) TEM image of Ni3N1− x layer on Ni foam. e) TEM image of Ni3N1− x nanoparticles scratched from Ni foam. f) HRTEM image and g) the corresponding FFT pattern of Ni3N1− x.
