Structural properties of tungsten-doped cobalt molybdate and its application in electrochemical oxygen evolution reaction
| Autor: | Supanan Anuchai, Surin Saipanya, Burapat Inceesungvorn, Gobwute Rujijanagul, Kontad Ounnunkad, Noppadol Aroonyadet, Doldet Tantraviwat |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Doping Inorganic chemistry Oxygen evolution Oxide chemistry.chemical_element 02 engineering and technology Overpotential 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics Fourier transform spectroscopy 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Linear sweep voltammetry Electrical and Electronic Engineering 0210 nano-technology Cobalt |
| Zdroj: | Journal of Materials Science: Materials in Electronics. 29:13103-13111 |
| ISSN: | 1573-482X 0957-4522 |
| Popis: | New tungsten-doped CoMoO4 (W-CoMoO4) was successfully synthesized by a simple co-precipitation method and investigated for a possible application in oxygen evolution reaction (OER). The effect of W6+ doping on structure, morphology, and chemical compositions was investigated by X-ray diffraction spectroscopy, scanning electron microscopy, Fourier transform spectroscopy, Brunauer–Emmet–Teller surface area measurement, and X-ray photoelectron spectroscopy. Linear sweep voltammetry indicates that doping CoMoO4 with an optimum W6+ amount of 21 wt% provides higher current density at lower overpotential than other catalysts. Compared to undoped CoMoO4, the 21 wt% W-CoMoO4 also shows a remarkable activity and excellent long-term stability in alkaline media. This superior activity is ascribed to the synergistic effect of increased oxygen vacancy, enhanced surface area, and possibly improved electrical conductivity upon W6+ doping. The significances of this work are that the potential OER application of Co–W–Mo tertiary oxide, which has never been studied before, and the effect of non-3d high-valency metal (W) doping on OER activity enhancement are now being recognized. |
| Databáze: | OpenAIRE |
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