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
Hierarchal Nanorod-Derived Bilayer Strategy to Enhance the Photocurrent Density of Sb2Se3 Photocathodes for Photoelectrochemical Water Splitting
Jaemin Park,Woo Seok Yang,Jeiwan Tan,Hyungsoo Lee,Ju Won Yun,Sang Gi Shim,Young Sun Park,Jooho Moon +7 more
TL;DR: In this article, a proper nanostructure strategy allowing sufficient light absorption and effective charge carrier transport is proposed for practical H2 production via photoelectrochemical (PEC) water splitting.
Journal ArticleDOI
Fullerene as a Photoelectron Transfer Promoter Enabling Stable TiO 2 -Protected Sb 2 Se 3 Photocathodes for Photo-Electrochemical Water Splitting
Jeiwan Tan,Woo Seok Yang,Yunjung Oh,Hyungsoo Lee,Jaemin Park,Ramireddy Boppella,Joosun Kim,Jooho Moon +7 more
TL;DR: In this paper, the degradation mechanism of photo-electrodes was investigated and the authors proposed an interface modification method to improve the long-term stability of Sb2Se3-based photocathodes by using fullerene (C60) as a photoelectron transfer promoter.
Journal ArticleDOI
Aluminum-incorporated p-CuO/n-ZnO photocathode coated with nanocrystal-engineered TiO2 protective layer for photoelectrochemical water splitting and hydrogen generation
Saeid Masudy-Panah,Saeid Masudy-Panah,Y.-J. Kong Eugene,Negar Dasineh Khiavi,Reza Katal,Xiao Gong,Xiao Gong +6 more
TL;DR: In this article, the authors demonstrate a highly efficient CuO-based photocathode fabricated on a glass substrate coated with fluorine-doped tin oxide (FTO) for solar-driven photoelectrochemical (PEC) water splitting and hydrogen evolution.
Journal ArticleDOI
Nano carbon conformal coating strategy for enhanced photoelectrochemical responses and long-term stability of ZnO quantum dots
Jung Kyu Kim,Sukang Bae,Wanjung Kim,Myung Jin Jeong,Sang Hyun Lee,Sang Hyun Lee,Chang-Lyoul Lee,Won Kook Choi,Won Kook Choi,Jun Yeon Hwang,Jong Hyeok Park,Dong Ick Son,Dong Ick Son +12 more
TL;DR: In this article, a conformal coating strategy with nanocarbon to enhance photoelectrochemical responses and the long-term stability of ZnO quantum dots is described, where strong anchoring bonds between a ZnOs core and nanocarbons ameliorate the poor electrochemical stability of znO in liquid electrolyte.
Journal ArticleDOI
Enhanced wetting of Cu on ZnO by migration of subsurface oxygen vacancies.
TL;DR: It is revealed that the surface-directed migration of subsurface defects affects the Cu adhesion on polar ZnO(0001) in the technologically interesting temperature range up to 550 K, which implies that defect concentrations in the bulk are an important, and possibly controllable, parameter for the metal-on-oxide growth.
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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