To obtain transition-metal-oxide-based materials with remarkable energy storage and conversion performance, rational design and synthesis of electrodes with abundant active sites is crucial. Herein, we propose an effective strategy for nitrogen doping in NiCo 2 O 4 (NCO) nanowire arrays using NH 3 plasma treatment. N-doped NCO contains oxygen vacancies with nitrogen atoms, nickel/cobalt nitrides, and high concentrations of Ni 2+ and Co 2+ within the structure, leading to high electrical conductivity. As expected, N-doped NCO electrodes exhibited excellent electrochemical performance for supercapacitors and hydrogen evolution reaction (HER) electrocatalysis in KOH electrolyte. This work provides a promising pathway toward developing advanced electrodes.
Bibliographical noteFunding Information:
This research was supported by the MIST (Ministry of Science and ICT), Korea, under the “ICT Consilience Creative Program” (IITP-2018-2017-0-01015) supervised by the IITP (Institute for Information & Communications Technology Promotion). This research was supported by the Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education (NRF-2018R1D1A1B07045703).
© 2019 The Royal Society of Chemistry.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)