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
Controlling the preferred orientation in sputter-deposited Cu2O thin films: Influence of the initial growth stage and homoepitaxial growth mechanism
Y. Wang,Jaafar Ghanbaja,Flavio Soldera,Pascal Boulet,David Horwat,F. Mücklich,Jean-François Pierson +6 more
TL;DR: In this article, the authors report the homoepitaxial growth of Cu2O thin films with tunable growth orientations on glass and silicon substrates using reactive sputtering.
Journal ArticleDOI
A stable inverse opal structure of cadmium chalcogenide for efficient water splitting
TL;DR: In this paper, the inverse opal structure (IOS) composed of Cadmium chalcogenide nanocrystals (CCNCs) was designed to achieve an unprecedentedly high photocurrent and hydrogen production rate.
Journal ArticleDOI
Hydrogen-bonded cyclic water clusters nucleated on an oxide surface.
Coleman X. Kronawitter,Christoph Riplinger,Xiaobo He,Percy Zahl,Emily A. Carter,Peter Sutter,Bruce E. Koel +6 more
TL;DR: The observation and molecular-scale scanning probe electronic structure (dI/dV) mapping of hydrogen-bonded cyclic water clusters nucleated on an oxide surface suggests that Cu vacancies in the growing islands of cuprous oxide inhibit water adsorption in the centers of the islands.
Journal ArticleDOI
Photoelectrochemical Properties of CuCrO2: Characterization of Light Absorption and Photocatalytic H2 Production Performance
Y Yi Ma,Y Yi Ma,X Xin Zhou,Quan-Bao Ma,A Anton Litke,Peng Liu,Y Yi Zhang,Can Li,Emiel Emiel Hensen +8 more
TL;DR: In this paper, the density functional theory calculations were used to compute the density of states and distinguish between Cr3+ d−d transitions and the charge separation electron transitions, which cannot be distinguished in CuCrO2 by UV-Vis spectroscopy.
Journal ArticleDOI
Higher-efficiency photoelectrochemical electrodes of titanium dioxide-based nanoarrays sensitized simultaneously with plasmonic silver nanoparticles and multiple metal sulfides photosensitizers
TL;DR: In this article, ordered TiO 2 nanorod arrays (NRs) are sensitized simultaneously with noble metal (Ag), binary metal sulfides (Ag 2 S) and ternary metal sulfide (Ag 3 CuS 2 ) multiple photosensitizers for the first time.
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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