Journal
ADVANCED MATERIALS
Volume 30, Issue 46, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201804033
Keywords
BiVO4; doping; polyoxovanadate; single-source precursor; water oxidation
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Funding
- China Scholarship Council
- Cambridge Trusts (Vice Chancellor's Award)
- Winton Programme for the Physics of Sustainability
- EPSRC [EP/J500380/1]
- A*STAR, Graduate Scholarship (Overseas)
- Imperial College Research Fellowship
- EPSRC NanoDTC in Cambridge [EP/L015978/1]
- Christian Doppler Research Association
- OMV Group
- Herchel Smith Research Fund
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Single-source precursors are used to produce nanostructured BiVO4 photoanodes for water oxidation in a straightforward and scalable drop-casting synthetic process. Polyoxometallate precursors, which contain both Bi and V, are produced in a one-step reaction from commercially available starting materials. Simple annealing of the molecular precursor produces nanocrystalline BiVO4 films. The precursor can be designed to incorporate a third metal (Co, Ni, Cu, or Zn), enabling the direct formation of doped BiVO4 films. In particular, the Co- and Zn-doped photoanodes show promise for photoelectrochemical water oxidation, with photocurrent densities >1 mA cm(-2) at 1.23 V vs reversible hydrogen electrode (RHE). Using this simple synthetic process, a 300 cm(2) Co-BiVO4 photoanode is produced, which generates a photocurrent of up to 67 mA at 1.23 V vs RHE and demonstrates the scalability of this approach.
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