Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 24, Issue 22, Pages 5697-5706Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201703104
Keywords
photoelectrochemistry; semiconductor electrode; surface modification; thin films; water splitting
Categories
Funding
- Japan Society for the Promotion of Science (JSPS) [16H02417, JP17J07120, 17H01216]
- JSPS through the Program for Leading Graduate Schools (MERIT)
- Grants-in-Aid for Scientific Research [17H01216] Funding Source: KAKEN
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Photoelectrochemical (PEC) water splitting using a combination of a photocathode and photoanode is one of the most promising methods of producing hydrogen from water employing sunlight. Recent reports have shown that surface modification of the photoelectrodes dramatically improves their PEC performance. Bare photoelectrodes often exhibit insufficient depletion regions, undesired surface states and/or degradation due to photocorrosion. It has been demonstrated that surface modifications can tune the flat-band potentials, band-edge potentials, surface states and chemical stabilities of these electrodes and thus improve quantum efficiency, onset potential and durability. This review describes in detail the various surface modification materials that have been developed to date, and the functions of these modifiers. This information is expected to provide guidelines for the future development of photoelectrodes capable of highly efficient and stable PEC water splitting.
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