Tuning light‐driven water splitting efficiency of Mo‐doped BiVO\(_4\)
- We present airbrush spray‐coating as a reproducible method for the preparation of Mo‐doped BiVO\(_4\) (Mo : BiVO\(_4\)) as photoabsorber with different layer thicknesses and Mo content. Optimisation of layer thickness is aiming on diminishing limitations by the electronic conductivity within the photoabsorber, thus increasing the incident photon to current efficiency (IPCE) of the samples. Furthermore, the Mo to V ratio leading to the highest photocurrent density was determined, and the optimised Mo : BiVO\(_4\) samples were decorated with a variety of oxygen evolution reaction (OER) electrocatalysts such as cobalt phosphate and layered double hydroxides. A mass loading gradient of Ni−Fe LDH was sprayed on top of the Mo : BiVO\(_4\) photoanode for optimisation of the OER catalyst loading. The photocurrent density was enhanced by up to 5.8 times at 0.8 V vs. RHE in comparison with the pristine Mo : BiVO\(_4\) sample in absence of any OER electrocatalyst.
| Author: | João Ricardo Coelho JunqueiraORCiDGND, Tim BobrowskiORCiDGND, Olga A. KrysiakORCiDGND, Ramona GutkowskiGND, Wolfgang SchuhmannORCiDGND |
|---|---|
| URN: | urn:nbn:de:hbz:294-75611 |
| DOI: | https://doi.org/10.1002/cctc.201901646 |
| Parent Title (English): | ChemCatChem |
| Subtitle (German): | optimised preparation and impact of oxygen evolution electrocatalysts |
| Publisher: | Wiley-VCH Verlag |
| Place of publication: | Weinheim |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2020/10/07 |
| Date of first Publication: | 2019/10/28 |
| Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
| Tag: | Bismuth vanadate; Mo-doped bismuth vanadate; oxygen evolution; oxygen evolution catalyst; photoelectrocatalysis |
| Volume: | 11 |
| Issue: | 24 |
| First Page: | 6417 |
| Last Page: | 6424 |
| Note: | Dieser Beitrag ist auf Grund des DEAL-Wiley-Vertrages frei zugänglich. |
| Institutes/Facilities: | Lehrstuhl für Analytische Chemie - Elektroanalytik & Sensorik |
| Dewey Decimal Classification: | Naturwissenschaften und Mathematik / Chemie, Kristallographie, Mineralogie |
| open_access (DINI-Set): | open_access |
| faculties: | Fakultät für Chemie und Biochemie |
| Licence (English): |  Creative Commons - CC BY 4.0 - Attribution 4.0 International |
