Fe-Doped NiSe Porous Nanosheets as Bifunctional Electrocatalysts for Efficient Overall Water Splitting

Abstract

It is urgent and meaningful to seek a facile method to design alternative electrocatalysts for effective overall water splitting. In this work, a facile one-step chemical bath deposition technique is employed to synthesize Fe-doped NiSe porous nanosheets on the Ni foam substrate (Fe–NiSe@NF). The synthesized Fe–NiSe@NF catalyst merely requires an overpotential of 195 and 110 mV to achieve 10 mA cm–2 and maintain stability for 35 h for OER and HER, respectively. When the Fe–NiSe@NF is simultaneously used as an anode and cathode, the current density reaches 10 mA cm–2 at a low cell voltage of 1.52 V under alkaline conditions. The outstanding water splitting performances of the Fe–NiSe@NF catalyst are attributed to the large electrochemical activity area of porous nanosheets, active phases generated on catalyst surfaces, and bimetallic synergistic effects. This work is beneficial for the exploitation of reliable and effective electrocatalysts to promote overall water splitting.

Microstructural and electron framework-engineered 3D NiSeP-integrated CuFe composites as trifunctional electrocatalysts for sensing and urea-assisted water-splitting applications

“…As shown in the spectrum of NS-CF@NCW, the vibrational signals appeared around 154, 220, and 242 cm −1 representing the phonon modes of Ni–Se in NS, whereas the minor peaks around 208 and 271 cm −1 can be assigned to the vibrational modes of the Se–Se pair. 68,69 Further, NSP-CF@NCW portrays the Raman signals around 165, 210, and 145 cm −1 ascribed to the vibrational modes of A 1g and E g , respectively, which confirms the successful incorporation of P-atoms. 70…”

Optimization of Pulse Electrodeposited Ni–Se Electrode Modified by Hydrothermally Reduced Graphene Oxide via Response Surface Methodology toward Developing Water-Splitting Electrode

“…13 Therefore, nickel-based bifunctional electrocatalysts, such as nickel selenides, were considered owing to their particular electrical structure. 14 Chen et al 15 produced a Fe-doped NiSe@NF electrocatalyst through a simple one-step chemical bath deposition method. Their produced electrocatalyst revealed η 10 of 110 and 195 mV for the HER and OER, respectively.…”