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
A silicon-based photocathode for water reduction with an epitaxial SrTiO3 protection layer and a nanostructured catalyst
Li Ji,Martin D. McDaniel,Shijun Wang,Agham-Bayan S Posadas,Xiaohan Li,Haiyu Huang,Jack C. Lee,Alexander A. Demkov,Allen J. Bard,John G. Ekerdt,Edward T. Yu +10 more
TL;DR: It is shown that a silicon-based photocathode with a capping epitaxial oxide layer can provide efficient and stable hydrogen production from water and be highly dependent on the size and spacing of the structured metal catalyst.
Journal ArticleDOI
Review of recent trends in photoelectrocatalytic conversion of solar energy to electricity and hydrogen
TL;DR: A review of the recent trends in the photoelectrocatalytic conversion of solar energy into electricity or hydrogen can be found in this article, where the basic principles and the design of devices are presented.
Journal ArticleDOI
Novel visible light induced Co3O4-g-C3N4 heterojunction photocatalysts for efficient degradation of methyl orange
TL;DR: In this article, a new visible-light-induced Co 3 O 4 -g-C 3 N 4 heterojunction photocatalysts were synthesized via a facile mixing-and-heating method.
Journal ArticleDOI
Strategies for enhancing the photocurrent, photovoltage, and stability of photoelectrodes for photoelectrochemical water splitting
TL;DR: This review places PEC in context with these competing technologies and highlights key advantages of PEC systems, and offers an outlook of how thin film-based PEC studies could lead to commercially viable water splitting systems.
Journal ArticleDOI
Enhanced Photoreduction CO2 Activity over Direct Z-Scheme α-Fe2O3/Cu2O Heterostructures under Visible Light Irradiation
Ji-Chao Wang,Lin Zhang,Wen-Xue Fang,Juan Ren,Yongyu Li,Hong-Chang Yao,Jianshe Wang,Zhongjun Li +7 more
TL;DR: Hematite-cuprous oxide (α-Fe2O3/Cu2O) nanocomposites are synthesized based on the design of Z-scheme photocatalyst for CO2 reduction and the selected catalysts are tunable by modulating the light wavelength.
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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