Cobalt-substituted iron-based wolframite synthesized via polyol route for efficient oxygen evolution reaction
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. Specificall...
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Elsevier
2020-11-01
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| Series: | Electrochemistry Communications |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1388248120301855 |
| _version_ | 1818242185746710528 |
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| author | Masaharu Nakayama Airi Takeda Heishi Maruyama Vijay Kumbhar Olivier Crosnier |
| author_facet | Masaharu Nakayama Airi Takeda Heishi Maruyama Vijay Kumbhar Olivier Crosnier |
| author_sort | Masaharu Nakayama |
| collection | DOAJ |
| description | 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 (η) 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 (η 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. |
| first_indexed | 2024-12-12T13:41:13Z |
| format | Article |
| id | doaj.art-5b8ebe0e0435451db311a878827a7029 |
| institution | Directory Open Access Journal |
| issn | 1388-2481 |
| language | English |
| last_indexed | 2024-12-12T13:41:13Z |
| publishDate | 2020-11-01 |
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| series | Electrochemistry Communications |
| spelling | doaj.art-5b8ebe0e0435451db311a878827a70292022-12-22T00:22:48ZengElsevierElectrochemistry Communications1388-24812020-11-01120106834Cobalt-substituted iron-based wolframite synthesized via polyol route for efficient oxygen evolution reactionMasaharu Nakayama0Airi Takeda1Heishi Maruyama2Vijay Kumbhar3Olivier Crosnier4Applied Chemistry, Graduate School of Sciences and Technology for Innovation, Japan; Blue Energy Center for SGE Technology (BEST), 2-16-1 Tokiwadai, Ube 755-8611, JapanApplied Chemistry, Graduate School of Sciences and Technology for Innovation, JapanApplied Chemistry, Graduate School of Sciences and Technology for Innovation, JapanApplied Chemistry, Graduate School of Sciences and Technology for Innovation, JapanInstitut des Matériaux Jean Rouxel (IMN), UMR 6502, Université de Nantes, CNRS, 44322 Nantes Cedex 3, FranceBinary 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 (η) 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 (η 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.http://www.sciencedirect.com/science/article/pii/S1388248120301855WolframitePolyol methodOxygen evolution reactionTernary tungstates |
| spellingShingle | Masaharu Nakayama Airi Takeda Heishi Maruyama Vijay Kumbhar Olivier Crosnier Cobalt-substituted iron-based wolframite synthesized via polyol route for efficient oxygen evolution reaction Electrochemistry Communications Wolframite Polyol method Oxygen evolution reaction Ternary tungstates |
| title | Cobalt-substituted iron-based wolframite synthesized via polyol route for efficient oxygen evolution reaction |
| title_full | Cobalt-substituted iron-based wolframite synthesized via polyol route for efficient oxygen evolution reaction |
| title_fullStr | Cobalt-substituted iron-based wolframite synthesized via polyol route for efficient oxygen evolution reaction |
| title_full_unstemmed | Cobalt-substituted iron-based wolframite synthesized via polyol route for efficient oxygen evolution reaction |
| title_short | Cobalt-substituted iron-based wolframite synthesized via polyol route for efficient oxygen evolution reaction |
| title_sort | cobalt substituted iron based wolframite synthesized via polyol route for efficient oxygen evolution reaction |
| topic | Wolframite Polyol method Oxygen evolution reaction Ternary tungstates |
| url | http://www.sciencedirect.com/science/article/pii/S1388248120301855 |
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