Significant Enhancement of the Photoelectrochemical Activity of CuWO<sub>4</sub> by using a Cobalt Phosphate Nanoscale Thin Film
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Materials chemistry enhancing photoelectrochemical activity of CuWO4 photoanodes; the object is a catalyst.
The study investigates photoelectrochemical water splitting materials rather than research itself.
Photoelectrochemistry of CuWO4 photoanodes; energy materials research.
Abstract
Abstract Nanostructured CuWO 4 photoanodes were fabricated through a facile electrodeposition method, which was followed by annealing the sample at 500 °C for 2 h. The morphologies, crystalline structure, electronic states, optical behaviors, and photoelectrochemical characteristics of the CuWO 4 nanomaterial were examined by scanning electron microscopy, X‐ray diffraction, X‐ray photoelectron spectroscopy, UV/Vis spectroscopy, and impedance spectroscopy, showing that the formed triclinic CuWO 4 nanoparticles had an indirect band gap of 2.2 eV and strong response to visible light. The cobalt phosphate (CoPi) nanoscale thin film, which was used as a co‐catalyst, was electrodeposited on the CuWO 4 surface. The photocurrent of the cobalt phosphate complex‐catalyzed CuWO 4 electrodes exhibited an 86 % higher photocurrent response than that of the unmodified CuWO 4 nanoparticles under the irradiation of one simulated sun (100 mW cm −2 ). The kinetics of this photoelectrochemical water splitting process was further investigated, and it was found that a more negative flat band potential and reduced charge transfer resistance were likely the primary reasons behind the enhancement.
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The record
- Venue
- ChemElectroChem
- Topic
- Advanced Photocatalysis Techniques
- Field
- Energy
- Canadian institutions
- University of GuelphLakehead University
- Funders
- Natural Sciences and Engineering Research Council of Canada
- Keywords
- PhotocurrentX-ray photoelectron spectroscopyMaterials scienceDielectric spectroscopyCobaltWater splittingScanning electron microscopeThin filmNanoparticleChemical engineeringSpectroscopyPhotocatalysisNanotechnologyElectrodeCatalysisOptoelectronicsChemistryElectrochemistryPhysical chemistry
- Has abstract in OpenAlex
- yes