AI Article Synopsis
- The study explores the energy levels of "black" hydrogenated titania in different forms using photoelectrochemical and XPS techniques.
- It finds that black rutile has a higher energy conduction band compared to black anatase, specifically 0.4 eV higher.
- The research suggests that in a mixed black titania setup, black rutile can enhance hydrogen production by acting as a photosensitizer, while optimizing thermal conditions can further increase hydrogen output.
Article Abstract
Here we investigate the band-level energetics of "black" hydrogenated titania in different polymorphs using in situ photoelectrochemical measurements and XPS valence band measurements. We find that the conduction band of black rutile is higher in energy than in black anatase by 0.4 eV. For photocatalytic hydrogen generation, in a polymorph hetero-junction such as in black Degussa P25, thus black rutile can act as a photosensitizer while black anatase provides charge-mediation catalysis onto H2O to generate H2. By optimizing the thermal reduction conditions of black anatase/rutile junctions the H2 production can be significantly increased.
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| http://dx.doi.org/10.1039/c8cc07665k | DOI Listing |
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