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
Electrochemical properties and relaxation times of the hematite/water interface.
TL;DR: Findings are underpinning important relationships between classical views on mineral surface complexation reactions and electrochemical views of semiconductor/water interfaces.
Journal ArticleDOI
Nano-structure ZnO/Cu 2 O photoelectrochemical and self-powered biosensor for esophageal cancer cell detection.
I-Chen Wu,Yu-Hsin Weng,Ming-Yen Lu,Chun-Ping Jen,Vladimir E. Fedorov,Wei Chung Chen,Ming-Tsang Wu,Chie-Tong Kuo,Hsiang-Chen Wang +8 more
TL;DR: The p-n heterojunction photoelectrochemical biosensor, which comprises a p-type Cu2O film formed by electrochemical deposition and n-type ZnO nanorods formed by the hydrothermal method, is prone to photoelectROchemical reactions and self-powered.
Journal ArticleDOI
Annealing effects and photoelectric properties of single-oriented Cu2O films electrodeposited on Au(111)/Si(100) substrates
TL;DR: In this paper, the structural, optical, and electrical properties of single-oriented Cu2O films electrodeposited on Au(111)/Si(100) substrates from an aqueous solution (pH = 12.5) containing copper acetate and lactic acid were reported.
Journal ArticleDOI
Photocatalytic H2 production over RuO2@ZnS and RuO2@CuS nanostructures
Szymon Wojtyła,Tomasz Baran +1 more
TL;DR: In this article, a small amount of ruthenium oxide at surface of sulfides was used to protect the sulfide photocatalysts and to improve its photostability.
Journal ArticleDOI
Amplification of PEC hydrogen production through synergistic modification of Cu2O using cadmium as buffer layer and dopant
TL;DR: In this article, a facile single step electro-synthesis is applied to develop Cu/Cu2O/Cd(OH)2 thin films from the alkaline copper sulfate solution in presence of different levels of Cd2+.
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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