Regulation of the morphology and electrochemical properties of Ni_0.85Se via Fe doping for overall water splitting and supercapacitors

Abstract

The Fe-doped Ni0.85Se nanosheets array on Ni foam was synthesized successfully through one-step solvothermal method as effective binder-free multifunctional catalysts for hydrogen evolution reaction (HER), oxygen evolution reaction (OER), overall...

Effects of chemical composition and vacant oxygen defects on the performance of Ni(OH)2–Ni0.85Se heterostructure nanowires as supercapacitor electrodes

“…This indicates that with an increase in selenization time, the band gap width gradually decreases, and the smaller the band gap width, the higher the carrier concentration, thus the better the conductivity. 30 The band gap width of the completely selenized Ni 0.85 Se nanowire is the smallest, which also indicates that the conductivity of the Ni 0.85 Se nanowire is the best. At the same time, the higher the component content of Ni 0.85 Se nanowire, the smaller the band gap width, and the better the conductivity.…”

Flexible electrode of Fe-doped NiSe2@porous graphene as binder-free anode for lithium-ion batteries

“…[40][41][42][43][44][45] However, compared with NiSe 2 @PG, the Ni 2p (including Ni 3+ 2p 1/2 , Ni 2+ 2p 1/2 , Ni 3+ 2p 3/2 , and Ni 2+ 2p 3/2 ) of Fe-NiSe 2 @PG presents upshis to higher binding energies of about 0.1 eV, indicating that the Fe doping changes the electrical structure of NiSe 2 and increases the binding energy of Ni 2p. 46,47 To further analyze the effect of iron doping on the interfacial interaction between graphene and NiSe 2 , the Se 3d spectra were investigated in detail (Fig. 4d).…”

“…[43][44][45] Similar to the Ni 2p spectra, the binding energies of Se 3d for Fe-NiSe 2 @PG were also higher than that for NiSe 2 @PG, which may be due to the charge transfer from nickel and iron to selenium. 46,47 Consequently, doping with Fe may provide more active sites for lithium ion storage.…”

Ce-Doped NiSe Nanosheets on Carbon Cloth for Electrochemical Water-Splitting

“…The existence of a metal vacancy and the large number of unsaturated atoms in Ni 0.85 Se play a leading role in HER and OER performances. However, poor electron transfer and aggregation tendency reduce the electrical conductivity of Ni 0.85 Se, which requires further improvement. , …”