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N-Doped NiO Nanosheet Arrays as Efficient Electrocatalysts for Hydrogen Evolution Reaction.
- Source :
- Journal of Electronic Materials; Sep2021, Vol. 50 Issue 9, p5072-5080, 9p
- Publication Year :
- 2021
-
Abstract
- Exploration of cost-effective high-performance non-noble-metal-based electrocatalysts for the hydrogen evolution reaction (HER) has attracted huge attention. In this work, a nitrogen doping method is adopted to construct self-supported, N-doped NiO nanosheet arrays (N-NiO) as an effective HER electrocatalyst. The N-NiO nanosheet arrays are firmly anchored on a nickel foam substrate, forming a free-standing integrated electrode with an open nanostructure. By virtue of its larger electrochemical active surface areas and better electron conductivity, the N-NiO electrode has admirable electrocatalytic HER performance with a low overpotential (154 mV at a current density of 10 mA cm<superscript>−2</superscript>) and a low Tafel slope of 90 mV dec<superscript>−1</superscript>. In addition, the N-NiO nanosheet arrays exhibit relatively stable electrocatalytic activity after a 10 h continuous test in an alkaline solution. Our reported rational design principle and optimization strategy provide a powerful way to construct advanced transition-metal-based electrocatalysts for the HER. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03615235
- Volume :
- 50
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Journal of Electronic Materials
- Publication Type :
- Academic Journal
- Accession number :
- 151704512
- Full Text :
- https://doi.org/10.1007/s11664-021-09053-w