Hydrothermally synthesized Ni3V2O8 nanoparticles with horny surfaces for HER and supercapacitor application

• Published in: Materials letters 2023-05, Vol.338, p.134033, Article 134033
• Main Authors: Yewale, M.A., Jadhvar, A.A., Kharade, R.B., Kadam, R.A., Kumar, V., Nakate, U.T., Shelke, P.B., Bobade, D.H., Teli, A.M., Dhas, S.D., Shin, D.K.
• Format: Article
• Language: English
• Subjects: Hydrogen Evolution Reaction; Hydrothermal; SEM; Stability study; Supercapacitor; TEM
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2023.134033

•Ni3V2O8 electrode shows an excellent areal capacitance of 1.09 F cm−2.•The Ni3V2O8 electrode has an energy density of 24 mWh cm−2.•Ni3V2O8 electrode exhibits over potential 175 mV at 10 mA cm−2 current density. This paper describes the hydrothermal synthesis of Ni3V2O8 nanoparticles for supercapacitor and hydrogen evolution study. The surface microstructure of Ni3V2O8 nanoparticles reveals an excellent areal-specific capacitance of 1.09 F cm−2 at a current density of 1 mA cm−2 and an energy density of 24 mWh cm−2 at a power density of 200 mW cm−2. In addition to supercapacitor performance, the Ni3V2O8 electrode revels well in hydrogen evolution reaction in 1 M KOH electrolyte. The Ni3V2O8 electrode exhibits a 175 mV over potential at 10 mA cm−2 current density and a 154 deg/mV Tafel slope before stabilization. According to the electrochemical impedance spectroscopy, the series resistance (Rs) is 3.89 Ω and the charge transfer resistance (Rct) is 5.62 Ω. The series resistance of the Ni3V2O8 electrode is the same, but Rct climbs to 6.45 Ω after 5 h of stability.