Metal-Organic Framework-Derived FeCo2S4/Co3O4 Heterostructure with Enhanced Electrocatalytic Performance for Oxygen Evolution and Hydrogen Evolution Reactions
Herein, a versatile FeCo2S4/Co3O4 heterostructure consisting of zeolitic imidazolate framework ZIF-derived Co3O4 and FeCo-layered double hydroxide-derived Fe-doped Co sulfide is employed for the all-important alkaline full water splitting process. The heterostructure is prepared by combining pyrolys...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1999. - 39(2023), 23 vom: 13. Juni, Seite 8224-8233 |
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| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2023
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| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Journal Article |
| Zusammenfassung: | Herein, a versatile FeCo2S4/Co3O4 heterostructure consisting of zeolitic imidazolate framework ZIF-derived Co3O4 and FeCo-layered double hydroxide-derived Fe-doped Co sulfide is employed for the all-important alkaline full water splitting process. The heterostructure is prepared by combining pyrolysis and hydrothermal/solvothermal processes. The synthesized heterostructure possesses an electrocatalytically rich interface and renders excellent bifunctional catalytic performance. An overpotential of 139 mV for a standard cathodic current of 10 mA cm-2 with a low Tafel slope of 81 mV dec-1 is recorded for the hydrogen evolution reaction. An overpotential of 210 mV is observed for an anodic current of 20 mA cm-2 with a low Tafel slope of 75 mV dec-1 recorded for the oxygen evolution reaction. The full-symmetric two-electrode cell was capable of generating a current density of 10 mA cm-2 at a cell potential of 1.53 V and a low onset potential of 1.49 V. The symmetric cell architecture exhibits remarkable stability, as a negligible potential increase is observed for continuous water splitting over a 10 h period. With the reported performance, the heterostructure compares well with most of the excellent reported catalysts for alkaline bifunctional catalysts |
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| Beschreibung: | Date Completed 13.06.2023 Date Revised 13.06.2023 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
| ISSN: | 1520-5827 |
| DOI: | 10.1021/acs.langmuir.3c00695 |