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
Enhancing hydrogen generation via fabricating peroxide decomposition layer over NiSe/MnO2-CdS catalyst
TL;DR: In this paper, the peroxide decomposing active MnO2 thin-layer over CdS nanowires and assembling oxygen separation artificial gill to remove nascent formed oxygen in the dispersion was used to overcome the disadvantage of Cds photocorrosion.
Journal ArticleDOI
How CdS nanoparticles can influence TiO2 nanotube arrays in solar energy applications
TL;DR: In this article, a titanium dioxide (TiO2) nanotube array (TNA) films are fabricated via anodization of titanium sheet, and Cadmium sulfide (CdS) nanoparticles are deposited on the synthesized TNAs by sequential-chemical bath deposition (S-CBD) method with different immersion cycle (n).
Journal ArticleDOI
Cu + -incorporated TiO 2 overlayer on Cu 2 O nanowire photocathodes for enhanced photoelectrochemical conversion of CO 2 to methanol
TL;DR: In this paper, photoelectrochemical (PEC) conversion of carbon dioxide (CO2) using photocathodes based on Cu2O nanowires (NWs) overcoated with Cu+-incorporated crystalline TiO2 (TiO2 Cu+) shell.
Book ChapterDOI
Metal Oxides in Photovoltaics: All-Oxide, Ferroic, and Perovskite Solar Cells
TL;DR: In this article, the most recent results observed when semiconductor oxides are applied in different NGPVs technologies are discussed, where the oxide is not only part of the device but also acts as the main light harvesting material.
Journal ArticleDOI
Few-layer MoS2 flakes as a hole-selective layer for solution-processed hybrid organic hydrogen-evolving photocathodes
Sebastiano Bellani,Leyla Najafi,Leyla Najafi,Andrea Capasso,Antonio Esau Del Rio Castillo,Maria Rosa Antognazza,Francesco Bonaccorso +6 more
TL;DR: In this paper, Li-aided exfoliation of the bulk counterpart was carried out to tune on-demand the MoS2 Fermi level in order to match the highest occupied molecular orbital level of the rr-P3HT, thus easing the hole collection at the electrode.
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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