Journal
CHEMICAL SOCIETY REVIEWS
Volume 46, Issue 7, Pages 1933-1954Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cs00918b
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Funding
- VILLUM Center for Science of Sustainable Fuels and Chemicals - VILLUM Fonden research grant [9455]
- Villum Fonden [00009455] Funding Source: researchfish
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Photoelectrochemical (PEC) solar-fuel conversion is a promising approach to provide clean and storable fuel (e.g., hydrogen and methanol) directly from sunlight, water and CO2. However, major challenges still have to be overcome before commercialization can be achieved. One of the largest barriers to overcome is to achieve a stable PEC reaction in either strongly basic or acidic electrolytes without degradation of the semiconductor photoelectrodes. In this work, we discuss fundamental aspects of protection strategies for achieving stable solid/liquid interfaces. We then analyse the charge transfer mechanism through the protection layers for both photoanodes and photocathodes. In addition, we review protection layer approaches and their stabilities for a wide variety of experimental photoelectrodes for water reduction. Finally, we discuss key aspects which should be addressed in continued work on realizing stable and practical PEC solar water splitting systems.
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