The morphology and electrochemical properties of WO3 and Se-WO3 films modified with cobalt-based oxygen evolution catalyst
| Autor: | Simona Ostachavičiūtė, Agnė Šulčiūtė, Eugenijus Valatka |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Scanning electron microscope Mechanical Engineering Oxygen evolution chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Tin oxide Electrocatalyst 01 natural sciences Tungsten trioxide 0104 chemical sciences Catalysis chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials Water splitting General Materials Science 0210 nano-technology Cobalt |
| Zdroj: | Materials Science and Engineering: B. 260:114630 |
| ISSN: | 0921-5107 |
| DOI: | 10.1016/j.mseb.2020.114630 |
| Popis: | In this paper, we have studied morphology and electrochemical properties of novel (photo)electrocatalyst of selenium doped tungsten trioxide (Se-WO3) modified with cobalt-based oxygen evolution catalyst (Co–Pi). Se-WO3 films were electrodeposited on fluorine doped tin oxide coated glass (FTO) support. Then photochemical deposition was employed to modify the surface of produced films with Co–Pi catalyst in order to increase their performance in photo(electrochemical) water splitting. Morphological and (photo)electrochemical properties were identified using X-ray powder diffraction (XRD), Scanning electron microscopy (SEM) with Energy dispersive X-ray analysis (EDX) and Fourier-transform infrared spectroscopy (FTIR), as well as electrochemical techniques in order to determine photon-to-current efficiency (IPCE) and photoconversion efficiency. The results indicated that the presence of cobalt-based catalyst effectively changes the activity of Se-WO3 films: the incident photon-to-current efficiency and photoconversion efficiency increased nearly twice and the onset potential for O2 evolution in the dark was also shifted towards lower values. |
| Databáze: | OpenAIRE |
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