Journal ArticleDOI
Oriented Ti doped hematite thin film as active photoanodes synthesized by facile APCVD
Peng Zhang,Peng Zhang,Alan Kleiman-Shwarsctein,Yong-Sheng Hu,Yong-Sheng Hu,Jarrod Lefton,Sudhanshu Sharma,Arnold J. Forman,Eric W. McFarland +8 more
TLDR
In this article, the photoanodes were measured as a function of titanium concentration and the incident photon-to-current conversion efficiency (IPCE) to hydrogen was measured in alkaline electrolyte.Abstract:
To improve the optoelectronic properties of iron oxide as a photoelectrode, hematite (α-Fe2O3) thin films were doped with titanium using atmospheric pressure chemical vapor deposition (APCVD) for synthesis. The films were prepared by pyrolysis of Fe(CO)5 and TiCl4 precursors on fluorine-doped tin oxide (FTO) substrates and found to have a polycrystalline morphology with faceted particulates ∼20 to 50 nm in size with a preferred crystallographic growth along the [110] direction. The performance of the photoanodes was measured as a function of titanium concentration. A maximum efficiency was observed at ∼0.8 atom% Ti in hematite. The Incident Photon-to-current Conversion Efficiency (IPCE) to hydrogen was measured in alkaline electrolyte. Under an applied bias of 0.6 V vs.Ag/AgCl at 400 nm the IPCE for water splitting in alkaline solution was found to be 27.2%, the highest efficiency reported for Ti doped hematite photoanodes. The IPCEs of the photoanode thin films at lower applied bias were further increased by calcination at 500 °C and by use of glucose as an anolyte.read more
Citations
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Journal ArticleDOI
Branched TiO2 Nanorods for Photoelectrochemical Hydrogen Production
In Sun Cho,Zhebo Chen,Arnold J. Forman,Dong Rip Kim,Pratap M. Rao,Thomas F. Jaramillo,Xiaolin Zheng +6 more
TL;DR: A hierarchically branched TiO(2) nanorod structure that serves as a model architecture for efficient photoelectrochemical devices as it simultaneously offers a large contact area with the electrolyte, excellent light-trapping characteristics, and a highly conductive pathway for charge carrier collection.
Journal ArticleDOI
α-Fe2O3 as a photocatalytic material: A review
Maneesha Mishra,Doo-Man Chun +1 more
TL;DR: In this paper, the authors reviewed the research that has been carried out to overcome these basic limitations and to enhance the photocatalytic activity of α-Fe 2 O 3.
Journal ArticleDOI
Recent advances in hybrid photocatalysts for solar fuel production
TL;DR: In this article, the use of semiconductors as light harvesting agents, combined with a bio-catalyst, synthetic bio-mimetic molecular catalyst or synthetic all-inorganic catalyst, in photocatalytic hybrid systems for water splitting and CO2 reduction is discussed.
Journal ArticleDOI
Nanostructured hematite: synthesis, characterization, charge carrier dynamics, and photoelectrochemical properties
TL;DR: In this article, the authors provide an overview of recent progress on the synthesis and characterization of nanostructured hematite, with an emphasis on the charge carrier dynamics and photoelectrochemical properties.
Journal ArticleDOI
Crystal facet engineering of photoelectrodes for photoelectrochemical water splitting
TL;DR: This article summarizes the major challenges and some invigorating perspectives for future research on crystal facet engineered photoelectrodes, which are believed to play a vital role in promoting the development of this important research field.
References
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Electrochemical Photolysis of Water at a Semiconductor Electrode
Akira Fujishima,Kenichi Honda +1 more
TL;DR: Water photolysis is investigated by exploiting the fact that water is transparent to visible light and cannot be decomposed directly, but only by radiation with wavelengths shorter than 190 nm.
Journal ArticleDOI
New Benchmark for Water Photooxidation by Nanostructured α-Fe2O3 Films
TL;DR: In this article, thin films of silicon-doped Fe2O3 were deposited by APCVD (atmospheric pressure chemical vapor deposition) from Fe(CO)5 and TEOS (tetraethoxysilane) on SnO2-coated glass at 415 °C.
Journal ArticleDOI
Cu2O as a photocatalyst for overall water splitting under visible light irradiation
Michikazu Hara,Takeshi Kondo,Mutsuko Komoda,Sigeru Ikeda,Junko N. Kondo,Kazunari Domen,Kiyoaki Shinohara,Akira Tanaka +7 more
TL;DR: In this paper, the photocatalytic water splitting on Cu2O powder proceeds without any noticeable decrease in the activity for more than 1900 h. The authors investigated the decomposition of water into H2 and O2 under visible light irradiation.
Journal ArticleDOI
Influence of Feature Size, Film Thickness, and Silicon Doping on the Performance of Nanostructured Hematite Photoanodes for Solar Water Splitting
TL;DR: In this article, Raman and Mossbauer showed that photoanodes consisting of nanostructured hematite prepared by atmospheric pressure chemical vapor deposition (APCVD) have previously set a benchmark for solar water splitting.
Journal ArticleDOI
Photoelectrochemical water oxidation by cobalt catalyst ("Co-Pi")/alpha-Fe(2)O(3) composite photoanodes: oxygen evolution and resolution of a kinetic bottleneck.
Diane K. Zhong,Daniel R. Gamelin +1 more
TL;DR: Results demonstrate that integration of this promising water oxidation catalyst with a photon-absorbing substrate can provide a substantial reduction in the external power needed to drive the catalyst's electrolysis chemistry.