Single-Source Deposition of Mixed-Metal Oxide Films Containing Zirconium and 3d Transition Metals for (Photo)electrocatalytic Water Oxidation.
Victor Riesgo-GonzalezSubhajit BhattacharjeeXinsheng DongDavid S HallVirgil AndreiAndrew D BondClare P GreyErwin ReisnerDominic S WrightPublished in: Inorganic chemistry (2022)
The fabrication of mixed-metal oxide films holds promise for the development of practical photoelectrochemical catalyst coatings but currently presents challenges in terms of homogeneity, cost, and scalability. We report a straightforward and versatile approach to produce catalytically active zirconium-based films for electrochemical and photoelectrochemical water oxidation. The mixed-metal oxide catalyst films are derived from novel single-source precursor oxide cage compounds containing Zr with first-row transition metals such as Co, Fe, and Cu. The Zr-based film doped with Co on fluorine-doped tin oxide (FTO)-coated glass exhibits the highest electrocatalytic O 2 evolution performance in an alkaline medium and an operational stability above 18 h. The deposition of this film onto a BiVO 4 photoanode significantly enhances its photoelectrochemical activity toward solar water oxidation, lowering the onset potential by 0.12-0.21 V vs reversible hydrogen electrode (RHE) and improving the maximum photocurrent density by ∼50% to 2.41 mA cm -2 for the CoZr-coated BiVO 4 photoanodes compared to that for bare BiVO 4 .
Keyphrases
- visible light
- room temperature
- reduced graphene oxide
- carbon nanotubes
- pet imaging
- metal organic framework
- ionic liquid
- human health
- gold nanoparticles
- oxide nanoparticles
- computed tomography
- nitric oxide
- mass spectrometry
- positron emission tomography
- hydrogen peroxide
- label free
- machine learning
- health risk assessment
- molecularly imprinted
- climate change
- tandem mass spectrometry