Journal ArticleDOI
Highly active oxide photocathode for photoelectrochemical water reduction
Adriana Paracchino,Vincent Laporte,Kevin Sivula,Michael Grätzel,Elijah Thimsen,Elijah Thimsen +5 more
TLDR
A highly active photocathode for solar H(2) production is presented, consisting of electrodeposited cuprous oxide, which was protected against photocathodic decomposition in water by nanolayers of Al-doped zinc oxide and titanium oxide and activated for hydrogen evolution with electroDeposited Pt nanoparticles.Abstract:
A clean and efficient way to overcome the limited supply of fossil fuels and the greenhouse effect is the production of hydrogen fuel from sunlight and water through the semiconductor/water junction of a photoelectrochemical cell, where energy collection and water electrolysis are combined into a single semiconductor electrode. We present a highly active photocathode for solar H(2) production, consisting of electrodeposited cuprous oxide, which was protected against photocathodic decomposition in water by nanolayers of Al-doped zinc oxide and titanium oxide and activated for hydrogen evolution with electrodeposited Pt nanoparticles. The roles of the different surface protection components were investigated, and in the best case electrodes showed photocurrents of up to -7.6 mA cm(-2) at a potential of 0 V versus the reversible hydrogen electrode at mild pH. The electrodes remained active after 1 h of testing, cuprous oxide was found to be stable during the water reduction reaction and the Faradaic efficiency was estimated to be close to 100%.read more
Citations
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Journal ArticleDOI
AStable and Efficient Photocathode Using an Sb 2 S 3 Absorber in a Near-Neutral Electrolyte for WaterSplitting
Yichen Wang,Yi-Yu Zeng,Yi-Yu Zeng,Lin-Hong Li,Chao Qin,Yanwen Wang,Zirui Lou,Fangyang Liu,Zhizhen Ye,Liping Zhu +9 more
TL;DR: In this article, a photocathode employing Sb2S3 as an absorber material with [hk1] orientation was successfully fabricated, which is suitable for sufficiently harvesting sunlight and efficient solar energy conversion.
Journal ArticleDOI
Expanding depletion region via doping: Zn-doped Cu2O buffer layer in Cu2O photocathodes for photoelectrochemical water splitting
Kangha Lee,Cheol-Ho Lee,Cheol-Ho Lee,Jun Young Cheong,Seokwon Lee,Il-Doo Kim,Han-Ik Joh,Han-Ik Joh,Doh C. Lee +8 more
TL;DR: In this paper, a photoelectrochemical hydrogen evolution reaction using a Cu2O-based photocathode with a layer doped with Zn ions was reported, where the doping results in the shift of the onset flatband potential, likely a consequence of maximized band-bending in the Cu 2O/Zn : Cu 2 O heterojunction.
Journal ArticleDOI
One-Dimensional Metal-Oxide Nanostructures for Solar Photocatalytic Water-Splitting
TL;DR: In this paper, the main synthesis methods, properties, and especially prominent applications in solar water splitting of 1D metal-oxides, including titanium dioxide (TiO2), zinc oxide (ZnO), tungsten trioxide (WO3), iron oxide (Fe2O3) and copper oxide (CuO), are fully discussed.
References
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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
A Monolithic Photovoltaic-Photoelectrochemical Device for Hydrogen Production via Water Splitting
O. Khaselev,John A. Turner +1 more
TL;DR: Direct water electrolysis was achieved with a novel, integrated, monolithic photoelectrochemical-photovoltaic design that splits water directly upon illumination; light is the only energy input.
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
High Density n-Si/n-TiO2 Core/Shell Nanowire Arrays with Enhanced Photoactivity
TL;DR: It is observed that highly dense Si/TiO(2) core/shell nanowire arrays enhanced the photocurrent by 2.5 times compared to planar Si/ TiO( 2) structure due to their low reflectance and high surface area.
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