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
p-type CuRhO2 as a self-healing photoelectrode for water reduction under visible light.
Jing Gu,Yong Yan,Jason W. Krizan,Quinn Gibson,Zachary M. Detweiler,Robert J. Cava,Andrew Bruce Bocarsly +6 more
TL;DR: Polycrystalline CuRhO2 is investigated as a photocathode for the splitting of water under visible irradiation, and its band edge positions straddle the water oxidation and reduction redox potentials, which allows for the stable formation of H2 with ca.
Journal ArticleDOI
Sensitive enzymatic glucose detection by TiO2 nanowire photoelectrochemical biosensors
TL;DR: In this article, the photogenerated holes over the TiO2 anode are utilized to form O2, which directly serves as an efficient electron shuttling mediator between the enzymatic redox center of GOx and the sensor surface.
Journal ArticleDOI
Recent progress in the development of semiconductor-based photocatalyst materials for applications in photocatalytic water splitting and degradation of pollutants
TL;DR: In this paper, a review summarizes the recent state-of-the-art first-principles research progress in the design of effective visible-light-response semiconductor photocatalysts through several modification processes with a focus on density functional theory (DFT) calculations.
Journal ArticleDOI
Efficient water reduction with gallium phosphide nanowires
AJ Anthony Standing,Simone Assali,Lu Gao,Marcel A. Verheijen,Marcel A. Verheijen,AD Dick van Dam,Y Yingchao Cui,Phl Peter Notten,Phl Peter Notten,Jem Jos Haverkort,Epam Erik Bakkers,Epam Erik Bakkers +11 more
TL;DR: The photoelectrochemical reduction of water, on a p-type wurtzite gallium phosphide nanowire photocathode with high current densities and open circuit potentials is reported, demonstrating the capabilities of this material, even when used in such low quantities, as in nanowires.
Journal ArticleDOI
Recent developments in complex metal oxide photoelectrodes
Fatwa F. Abdi,Sean P. Berglund +1 more
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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