Strategies for stable water splitting via protected photoelectrodes

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Abstract

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 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.
Original languageEnglish
JournalChemical Society Reviews
Volume46
Issue number7
Pages (from-to)1933-1954
Number of pages22
ISSN0306-0012
DOIs
Publication statusPublished - 2017

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