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
Interfacial Charge Transfer in Photoelectrochemical Processes
TL;DR: In this paper, the charge transfer processes at the interface and the relationship between photogenerated charge separation and photocatalytic activity are discussed, along with the fundamentals of IFCT in photo-electrochemical processes; semiconductor heterojunctions with materials having proper band alignment and offer new ways to design multifunctional photocATalysts are also disusseded.
Journal ArticleDOI
Band Edge Engineering of Oxide Photoanodes for Photoelectrochemical Water Splitting: Integration of Subsurface Dipoles with Atomic‐Scale Control
Yasuyuki Hikita,Kazunori Nishio,Kazunori Nishio,Linsey C. Seitz,Pongkarn Chakthranont,Takashi Tachikawa,Thomas F. Jaramillo,Thomas F. Jaramillo,Harold Y. Hwang,Harold Y. Hwang +9 more
TL;DR: In this article, the ability to modulate the flat band potential of oxide photoanodes by as much as 1.3 V, using the insertion of subsurface electrostatic dipoles near a Nb-doped SrTiO3/aqueous interface is reported.
Journal ArticleDOI
Electrochemical Synthesis of Cu2O Concave Octahedrons with High-Index Facets and Enhanced Photoelectrochemical Activity.
TL;DR: Experimental results demonstrated the Cu2O concave octahedrons to be highly efficient, cost-effective catalysts for photoelectrochemical hydrogen production and a promising route for the synthesis of metal or metal oxide crystals with high activity.
Journal ArticleDOI
The Surface Structure of Cu2O(100)
Markus Soldemo,Joakim Halldin Stenlid,Zahra Besharat,Milad Ghadami Yazdi,Anneli Önsten,Christofer Leygraf,Mats Göthelid,Tore Brinck,Jonas Weissenrieder +8 more
TL;DR: In this article, the atomic structure and electronic properties of Cu2O(100) were determined by a combination of multiple experimental techniques and simulations within the framework of density functional theory (DFT).
Journal ArticleDOI
Photoelectrocatalytic Glucose Oxidation to Promote Hydrogen Production over Periodically Ordered TiO2 Nanotube Arrays Assembled of Pd Quantum Dots
TL;DR: In this article, the authors used the periodically ordered TiO 2 nanotube arrays (TNTAs) assembled of Palladium quantum dots (Pd QDs) as photoanode.
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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