Ni doped Bi2WO6 for electrochemical OER activity. (31st July 2020)

• Record Type: Journal Article
• Authors: Keerthana, SP.; Rani, B. Jansi; Ravi, G.; Yuvakkumar, R.; Hong, S.I.; Velauthapillai, Dhayalan; Saravanakumar, B.; Thambidurai, M.; Dang, Cuong
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 38(2020)
• Page Start: 18859
• Page End: 18866
• Publication Date: 2020-07-31
• Subjects: Ni doping -- Bi2WO6 -- Nanoneedles -- OER activity; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.05.135
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Due to over depletion of fossil fuels, researchers started to find hydrogen energy to compete with the energy demands. Bi2 WO6 and Ni (5% and 10%) doped Bi2 WO6 were prepared via hydrothermal route. Structural confirmation of undoped and doped Bi2 WO6 nanostructures was estimated by using standard characterization studies. The nanoflake and nanoneedle like morphology of undoped and Ni doped Bi2 WO6 was confirmed in nanoscale range. The highest OER activity was achieved for 10% Ni doped Bi2 WO6 nanostructure electrode with the excellent current density of 272 mA/g with overpotential of 242 mV in the fabricated three electrode half cell set up. The higher electron transport offered by Ni ions to Bi2 WO6 host has been reported with the electrochemical mechanism. Hence, the unusual robust electrodes for electrochemical potential applications by tuning its property via suitable foreign ion dopant could be the great beginning of this recent year research. In such a way, this work would be the better way of swapping of nobel metal catalysts for electrochemical OER activity. Highlights: Bare and Ni doped Bi2 WO6 morphological evolution has been explored. 10% Ni doped Bi2 WO6 revealed excellent OER activity of 272 mA/g at 10 mV/s. Appreciably low overpotential of 242 mV has been achieved for 10% Ni doped Bi2 WO6 . Explored higher electron transport offered by Ni ions to Bi2 WO6 host. Outstanding stability over 24 h with high conductivity was achieved.