Journal ArticleDOI
Charge carrier trapping, recombination and transfer in hematite (α-Fe2O3) water splitting photoanodes
TLDR
In this paper, the relationship between PEC activity and transient measurements is discussed in terms of a phenomenological model which rationalizes the observations and in particular the impact of external potential bias on the relative rates of charge carrier trapping, recombination and interfacial transfer in hematite photoanodes for water oxidation.Abstract:
Hematite is currently considered one of the most promising materials for the conversion and storage of solar energy via the photoelectrolysis of water. Whilst there has been extensive research and much progress in the development of hematite structures with enhanced photoelectrochemical (PEC) activity, relatively limited information has been available until recently concerning the dynamics of photogenerated charge carriers in hematite and their impact upon the efficiency of water photoelectrolysis. In this perspective we present an overview of our recent studies of the dynamics of photoinduced charge carrier processes in hematite, derived primarily from transient absorption spectroscopy of nanostructured photoanodes. The relationship between PEC activity and transient measurements are discussed in terms of a phenomenological model which rationalizes the observations and in particular the impact of external potential bias on the relative rates of charge carrier trapping, recombination and interfacial transfer in hematite photoanodes for water oxidation.read more
Citations
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Journal ArticleDOI
Visible-light driven heterojunction photocatalysts for water splitting – a critical review
TL;DR: Li et al. as mentioned in this paper provided an overview of the concept of heterojunction construction and more importantly, the current state-of-the-art for the efficient, visible-light driven junction water splitting photo(electro)catalysts reported over the past ten years.
Journal ArticleDOI
Time-resolved observations of water oxidation intermediates on a cobalt oxide nanoparticle catalyst
TL;DR: Using time-resolved Fourier-transform infrared spectroscopy and under reaction conditions, intermediates of water oxidation catalysed by an abundant metal-oxide catalyst, cobalt oxide (Co3O4), are identified.
Journal ArticleDOI
Using hematite for photoelectrochemical water splitting: a review of current progress and challenges.
TL;DR: Recent progress in manipulating hematite for PEC water splitting through various approaches is reviewed, focused on e.g. enhancing light absorption, water oxidation kinetics, and charge carrier collection efficiency.
Journal ArticleDOI
Surface Tuning for Oxide-Based Nanomaterials as Efficient Photocatalysts
TL;DR: In this review, special emphases are given to surface tuning of novel nanocrystallites for high thermal stability, hierarchical structure assembly, heterojunctional nanocomposites and high-energy-facet exposure, along with effective testing tools for photogenerated charge properties at the surfaces and/or interfaces.
Journal ArticleDOI
Photoanodes based on TiO2 and α-Fe2O3 for solar water splitting – superior role of 1D nanoarchitectures and of combined heterostructures
Stepan Kment,Francesca Riboni,Francesca Riboni,Šárka Paušová,Lei Wang,Lingyun Wang,Hyungkyu Han,Zdenek Hubicka,Josef Krysa,Patrik Schmuki,Patrik Schmuki,Patrik Schmuki,Radek Zboril +12 more
TL;DR: Various synthetic methods and modifying concepts of 1D-photoanodes (nanotubes, nanorods, nanofibers, nanowires) based on titania, hematite, and on α-Fe2O3/TiO2 heterostructures, for PEC applications are described.
References
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Journal ArticleDOI
Heterogeneous photocatalyst materials for water splitting
Akihiko Kudo,Yugo Miseki +1 more
TL;DR: This critical review shows the basis of photocatalytic water splitting and experimental points, and surveys heterogeneous photocatalyst materials for water splitting into H2 and O2, and H2 or O2 evolution from an aqueous solution containing a sacrificial reagent.
Journal Article
Photoelectrochemical cells : Materials for clean energy
TL;DR: In this paper, the authors look into the historical background, and present status and development prospects for photoelectrochemical cells, based on nanocrystalline materials and conducting polymer films.
Journal ArticleDOI
Solar Water Splitting Cells
Michael G. Walter,Emily L. Warren,James R. McKone,Shannon W. Boettcher,Qixi Mi,Elizabeth A. Santori,Nathan S. Lewis +6 more
TL;DR: The biggest challenge is whether or not the goals need to be met to fully utilize solar energy for the global energy demand can be met in a costeffective way on the terawatt scale.
Journal ArticleDOI
Solar Water Splitting: Progress Using Hematite (α‐Fe2O3) Photoelectrodes
TL;DR: The latest efforts using advanced characterization techniques, particularly electrochemical impedance spectroscopy, are presented to define the obstacles that remain to be surmounted in order to fully exploit the potential of hematite for solar energy conversion.
Journal ArticleDOI
Inorganic Materials as Catalysts for Photochemical Splitting of Water
TL;DR: A review of the known inorganic catalysts with a focus on structure-activity relationships is given in this article, where the first water splitting system based on TiO2 and Pt was proposed by Fujishima and Honda in 1972.
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