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
Stable hybrid organic/inorganic photocathodes for hydrogen evolution with amorphous WO3 hole selective contacts
Alessandro Mezzetti,Alessandro Mezzetti,Francesco Fumagalli,Antonio Alfano,Antonio Alfano,Daniele Iadicicco,Daniele Iadicicco,Maria Rosa Antognazza,Fabio Di Fonzo +8 more
TL;DR: This work demonstrates that the stability of a hybrid organic/inorganic photocathode, employing a P3HT:PCBM blend as photoactive material, can be considerably improved by introducing an electrochemically stable WO3 hole selective layer, paired with a TiO2 electron selective layer.
Journal ArticleDOI
Enhanced Photoelectrochemical Activity in All‐Oxide Heterojunction Devices Based on Correlated “Metallic” Oxides
Brent A. Apgar,Brent A. Apgar,Sungki Lee,Sungki Lee,Lauren E. Schroeder,Lauren E. Schroeder,Lane W. Martin,Lane W. Martin +7 more
TL;DR: Photovoltaic and photocatalytic responses are driven by hot electron injection from the "metallic" oxide into the TiO2 , enabling new modalities of operation for energy systems.
Journal ArticleDOI
Pulsed laser/ electrodeposited CuBi2O4/BiVO4 p-n heterojunction for solar water splitting
TL;DR: In this article, the authors presented the optimization of CuBi2O4 thin films synthesized by electrodeposition method on FTO glass substrate, which were further fabricated by depositing BiVO4 on CuBi 2O4 with pulsed laser deposition method.
Journal ArticleDOI
Transparent Ta2O5 Protective Layer for Stable Silicon Photocathode under Full Solar Spectrum
TL;DR: Protective layers are always required for Si-based photoelectrodes to achieve long-term stability in solar water splitting, for which TiO2, with excellent chemical stability and the effectiveness o...
Journal ArticleDOI
Photoelectrochemical water splitting properties of hydrothermally-grown ZnO nanorods with controlled diameters
TL;DR: In this article, the effect of diameter change on photoelectrochemical water splitting was investigated in depth for ZnO nanorods with diameters from 45 to 255 nm.
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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