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
Hydrogenated MoS2 QD-TiO2 heterojunction mediated efficient solar hydrogen production.
Arka Saha,Apurba Sinhamahapatra,Tong-Hyun Kang,Subhash Chandra Ghosh,Jong-Sung Yu,Asit Baran Panda +5 more
TL;DR: The development of a hydrogenated MoS2 QD-TiO2 (HMT) heterojunction as an efficient photocatalytic system via a one-pot hydrothermal reaction followed by hydrogenation to facilitate the formation of MoS 2 QDs with an enhanced band gap and a proper heterojunctions between them and TiO2, which accelerates charge transfer process.
Journal ArticleDOI
Carbon coated Cu2O nanowires for photo-electrochemical water splitting with enhanced activity
TL;DR: In this paper, a photo-electrochemical (PEC) water splitting hydrogen production was reported on a Cu 2 O nanowire photocathode covered with amorphous carbon thin layer by a simple and effective anodization method.
Journal ArticleDOI
Solution Combustion Synthesis, Characterization, and Photoelectrochemistry of CuNb2O6 and ZnNb2O6 Nanoparticles
Attila Kormányos,Abegayl Thomas,Muhammad N. Huda,Pranab Sarker,J. Ping Liu,Narayan Poudyal,Csaba Janáky,Krishnan Rajeshwar +7 more
TL;DR: In this paper, the solution combustion synthesis of two different ternary niobium oxides, namely, p-CuNb2O6 and n-ZnNb 2O6, was reported.
Journal ArticleDOI
Employing Overlayers To Improve the Performance of Cu2BaSnS4 Thin Film based Photoelectrochemical Water Reduction Devices
Jie Ge,Paul J. Roland,Prakash Koirala,Weiwei Meng,James L. Young,Reese Petersen,Todd G. Deutsch,Glenn Teeter,Randy J. Ellingson,Robert W. Collins,Yanfa Yan +10 more
TL;DR: In this article, an Earth-abundant copper-barium-thiostannate Cu2BaSnS4 (CBTS)-based thin films have been reported to exhibit the optoelectronic and defect properties suitable as absorbers for photoelectrochemical (PEC) water splitting and the top cell of tandem photovoltaic solar cells.
Journal ArticleDOI
Mesoporous Fe2O3–CdS Heterostructures for Real-Time Photoelectrochemical Dynamic Probing of Cu2+
Jing Tang,Jun Li,Yue-Yu Zhang,Biao Kong,Yiliguma,Yang Wang,Yingzhou Quan,Hao Cheng,Abdullah M. Al-Enizi,Xingao Gong,Gengfeng Zheng +10 more
TL;DR: A three-dimensional mesoporous Fe2O3-CdS nanopyramid heterostructure is developed for solar-driven, real-time, and selective photoelectrochemical sensing of Cu(2+) in the living cells, enabling the PEC performance enhancement by facilitating ion transport and providing more active electrochemical reaction sites.
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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