About this Research Topic
The development of clean and sustainable energy and environmental remediation are two of the most important concerns for a sustainable future. The most abundant renewable energy source is the sun; sunlight not only can be used to produce electrical energy, but can also be used for environmental remediation. Sunlight can be converted into chemical energy stored in fuels or chemicals, either through a direct approach, e.g., via photochemical and photoelectrochemical processes, or an indirect one, e.g., via photovoltaic-assisted electrochemical processes. Such fuels or chemicals, when fed into electrochemical devices such as fuel cells or batteries, can be used to produce electrical energy. Also, sunlight can be used for environmental pollutant degradation, and pathogen deactivations through photochemical and photoelectrochemical processes, where photocatalysis and photoelectrocatalysis employing sunlight have been among of the most successful environmental remediation techniques developed so far. However, market penetration of these technologies is likely to be costly, owing largely to the low efficiency associated with the slow kinetics of several key reactions involved. Semiconductors with appropriate chemical properties play critical roles in all these technologies; therefore a successful outcome of these technologies necessitates the development of new semiconductors, preferably at low cost, to efficiently accelerate chemical reaction rates.
Semiconductors that efficiently increase the rate and selectivity of key chemical reactions involved are at the heart of these newly developed green technologies. Recently, perovskites, as a new class of high-performance and cheap semiconductors, have intensively been studied in photochemical and photoelectrochemical applications. In this Research Topic, we would like to explore recent advancements of perovskites in various photochemical and photoelectrochemical applications including general catalysis, photocatalysis, electrocatalysis, photoelectrocatalysis, and photovoltaic-assisted electrocatalysis. Chemical properties of perovskite such as chemical stability, chemical reactivity, chemical reaction rates, chemical selectivity, etc., are mainly responsible for perovskite performance in photochemical and photoelectrochemical applications. So far, oxide perovskites have shown excellent chemical stability but low chemical reactivity and reaction rates, as opposed to halide perovskites which have shown high chemical reactivity and reaction rates but very poor chemical stability.
The aim of this Research Topic is to discuss the advantages and disadvantages of perovskite materials and their efficiencies in photochemical and photoelectrochemical applications. We would like to present a realistic outlook for improving chemical properties of perovskites, as well as the development of new perovskites having simultaneously excellent chemical stability, high chemical reactivity, and reaction rates for high-performance in photochemical and photoelectrochemical applications.
We welcome submissions of Original Research, Review, Minireview and Perspective articles, in themes including, but not limited to:
• Comprehensive studies on recent progress in perovskites for photochemical and photoelectrochemical applications
• The strategies used to improve the chemical properties of the perovskites for photochemical and photoelectrochemical reactions
• Recent developments and strategies regarding the design of new perovskites for photochemical and photoelectrochemical applications
• The methodologies used to improve the photoactivity and light absorption capabilities of the perovskites
• Characterization techniques to in-situ probe chemical properties of perovskites in photochemical and photoelectrochemical reactions
• Kinetic of photochemical and photoelectrochemical process, including charge generation, transfer, transport, occurring at perovskite/liquid and perovskite/gas interfaces
Keywords: perovskite, solar energy, photocatalysis, electrocatalysis, photoelectrocatalysis, photovoltaic-assisted electrocatalysis
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