Imaging hole transport at catalyst-coated MIS photoanodes for water splitting under high-intensity illumination
Abstract
surface is influenced by the presence of electrolyte at the interface. Second, the main photocurrent contribution arises from illumination of Ni-free regions, even mm away from the Ni active sites. Third, the hole collection at the catalyst becomes significantly limited under high-intensity illumination regimes. These results are rationalized, allowing a general description of the transport of photogenerated holes in these MIS photoanodes. Furthermore, PEC mapping directly reveals that the issue of limited hole collection at high illumination intensities can be mitigated by shortening the spacing between catalyst islands. These findings offer key insights for designing more efficient PEC-based solar fuel systems that perform efficiently under high light intensities, such as concentrated sunlight.
Fields of Study & Subjects
TiO2 Photocatalysis and Solar Cells
Nanowire Synthesis and Applications
Electron and X-Ray Spectroscopy Techniques
Publication details
- Journal / source
- Chemical Science
- Publisher
- Royal Society of Chemistry (RSC)
- Volume
- 17
- Issue
- 15
- Pages
- 7717–7728
- Publication date
- 1 January 2026
- Language
- EN