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
Fabrication of coral-like Cu2O nanoelectrode for solar hydrogen generation
TL;DR: In this paper, a coral-like p-type Cu 2 O nanostructural film on copper foil is successfully fabricated via a facile and cost-effective template route through transformation of Cu(OH) 2 nanowires for photoelectrochemical (PEC) hydrogen generation.
Journal ArticleDOI
Quantum-sized BiVO4 modified TiO2 microflower composite heterostructures: efficient production of hydroxyl radicals towards visible light-driven degradation of gaseous toluene
TL;DR: In this paper, a novel quantum-sized tubelike BiVO4 sensitized TiO2 microflower catalytic system was successfully fabricated by using a facile hydrothermal and ultrasonic adhering approach.
Journal ArticleDOI
Improving charge collection with delafossite photocathodes: a host–guest CuAlO2/CuFeO2 approach
TL;DR: In this paper, a mesoporous p-type scaffold is used to support a thin-film of the light absorber, which results in a 2.4fold increase in photocurrent in the presence of O2.
Journal ArticleDOI
Photoelectrochemical Water-Splitting Using CuO-Based Electrodes for Hydrogen Production: A Review
Roozbeh Siavash Moakhar,Seyed Morteza Hosseini-Hosseinabad,Saeid Masudy-Panah,Saeid Masudy-Panah,Ashkan Seza,Mahsa Jalali,Hesam Fallah-Arani,Fatemeh Dabir,Somayeh Gholipour,Yaser Abdi,Mohiedin Bagheri-Hariri,Nastaran Riahi-Noori,Yee-Fun Lim,Anders Hagfeldt,Michael Saliba +14 more
TL;DR: The recent advancements of CuO-based photoelectrodes, including undoped and doped CuO, in the PEC water-splitting field, are comprehensively studied in this article.
Journal ArticleDOI
Electrodeposited Cu2O as Photoelectrodes with Controllable Conductivity Type for Solar Energy Conversion
TL;DR: In this paper, the conduction type of the Cu2O-based semiconductor was, therefore, tunable, allowing the fabrication of n-type, p-type and p-n junction photoelectrodes.
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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