Single-Source Deposition of Mixed-Metal Oxide Films Containing Zirconium and 3d Transition Metals for (Photo)electrocatalytic Water Oxidation.
American Chemical Society (ACS)
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Riesgo-Gonzalez, V., Bhattacharjee, S., Dong, X., Hall, D., Andrei, V., Bond, A., Grey, C., et al. (2022). Single-Source Deposition of Mixed-Metal Oxide Films Containing Zirconium and 3d Transition Metals for (Photo)electrocatalytic Water Oxidation.. Inorg Chem https://doi.org/10.1021/acs.inorgchem.2c00403
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 O2 evolution performance in an alkaline medium and an operational stability above 18 h. The deposition of this film onto a BiVO4 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 BiVO4 photoanodes compared to that for bare BiVO4.
Faraday Institute (UK), Cambridge Trust, St. John's College Cambridge, National First-Class Disciplines (China).
Engineering and Physical Sciences Research Council (EP/P024947/1)
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External DOI: https://doi.org/10.1021/acs.inorgchem.2c00403
This record's URL: https://www.repository.cam.ac.uk/handle/1810/335531
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