Metallic Nickel Nitride Nanosheets Realizing Enhanced Electrochemical Water Oxidation
Citations Over TimeTop 1% of 2015 papers
Abstract
Exploring efficient and inexpensive oxygen evolution reaction (OER) electrocatalysts is of great importance for various electrochemical energy storage and conversion technologies. Ni-based electrocatalysts have been actively pursued because of their promising activity and earth abundance. However, the OER efficiency for most of the developed Ni-based electrocatalysts has been intrinsically limited due to their low electrical conductivity and poor active site exposure yield. Herein, we report metallic Ni3N nanosheets as an efficient OER electrocatalyst for the first time. The first-principles calculations and electrical transport property measurements unravel that the Ni3N is intrinsically metallic, and the carrier concentration can be remarkably improved with dimensional confinement. The EXAFS spectra provide solid evidence that the Ni3N nanosheets have disordered structure resultant of dimensional reduction, which then could provide more active sites for OER. Benefiting from enhanced electrical conductivity with metallic behavior and atomically disordered structure, the Ni3N nanosheets realize intrinsically improved OER activity compared with bulk Ni3N and NiO nanosheets. Our finding suggests that metallic nitride nanosheets could serve as a new group of OER electrocatalysts with excellent property.
Related Papers
- → Electrochemically Exfoliated β-Co(OH)2 Nanostructures for Enhanced Oxygen Evolution Electrocatalysis(2020)74 cited
- → High efficiency electrocatalyst of LaCr0.5Fe0.5O3 nanoparticles on oxygen-evolution reaction(2020)35 cited
- → Nd6Ir2O13 as an Efficient Electrocatalyst Boosts the Oxygen Evolution Reaction in Acidic Media(2022)25 cited
- → Electrocatalyst of RuO2 decorating TiO2 nanowire arrays for acidic oxygen evolution(2022)24 cited
- Fabrication of NiO coated SiO2 and SiO2 coated NiO for the removal of Pb2＋ ions(2014)