Nakayama, M., Takeda, A., Maruyama, H., Kumbhar, V. & Crosnier, O. (2020) Cobalt-substituted iron-based wolframite synthesized via polyol route for efficient oxygen evolution reaction. Electrochemistry Communications, 120 106834.
Added by: Richard Baschera (2020-11-17 13:20:19) Last edited by: Richard Baschera (2020-11-17 13:59:26)
|Type de référence: Article
Numéro d'identification (ISBN etc.): 13882481
Clé BibTeX: Nakayama2020
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|Catégories: INTERNATIONAL, ST2E
Créateurs: Crosnier, Kumbhar, Maruyama, Nakayama, Takeda
Collection: Electrochemistry Communications
Consultations : 9/161
Indice de consultation : 3%
Indice de popularité : 0.75%
|Liens URLs https://linkinghub ... /S1388248120301855|
Binary tungsten oxides with a wolframite crystal structure, such as FeWO4 and CoWO4, have poor electrocatalytic activity for the oxygen evolution reaction (OER). However, the incorporation of a third element into the crystalline framework increased the OER activity in an alkaline medium. Specifically, Co0.5Fe0.5WO4 prepared through a polyol route generated a current density of 10 mA cm(-2) at a considerably small overpotential (eta) and Tafel slope (331 mV and 36.8 mV dec(-1), respectively). This overpotential value was superior to those of Co0.5Fe0.5WO4 fabricated through a conventional hydrothermal route (eta at 10 mA cm(-2) = 360 mV) and commercial RuO2 (365 mV), a benchmark catalyst for the OER. The turnover frequency (TOF) of the polyol-synthesized Co0.5Fe0.5WO4 was estimated to be 0.235 s(-1) at an overpotential of 400 mV, while stable operation at 10 mA cm(-2) was maintained for at least 24 h.