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
Highly enhanced photocatalytic H2 evolution of Cu2O microcube by coupling with TiO2 nanoparticles.
TL;DR: It is believed that the Cu2O/TiO2 p-n heterojunction composites could provide an alternative method to design highly efficient photocatalysts for solar energy.
Journal ArticleDOI
Surface functionalization of nanostructured Fe2O3 polymorphs: from design to light-activated applications.
Davide Barreca,Giorgio Carraro,Alberto Gasparotto,Chiara Maccato,Francesca Rossi,Giancarlo Salviati,Massimo Tallarida,Chittaranjan Das,Fernando Fresno,Dorota Korte,Urška Lavrenčič Štangar,Mladen Franko,Dieter Schmeisser +12 more
TL;DR: An extensive multitechnique characterization evidenced that the photoactivated hydrophilic and photocatalytic behavior of the synthesized materials is dependent both on iron oxide phase composition and ALD surface modification, suggesting the proposed CVD/ALD hybrid synthetic approach candidates itself as a powerful tool for a variety of applications where semiconductor-based nanoarchitectures can benefit from the coupling with an ad hoc surface layer.
Journal ArticleDOI
The study of post annealing effect on Cu2O thin-films by electrochemical deposition for photoelectrochemical applications
TL;DR: In this article, the effect of annealing temperatures and durations on the morphological, structural, photoelectrochemical and optical properties of Cu 2 O thin-films grown with pH value 11 was examined.
Journal ArticleDOI
Electrodeposition of Cu2O/g-C3N4 heterojunction film on an FTO substrate for enhancing visible light photoelectrochemical water splitting
Shengsen Zhang,Shengsen Zhang,Jie Yan,Siyuan Yang,Yue-Hua Xu,Xin Cai,Xin Li,Xiangchao Zhang,Feng Peng,Yueping Fang +9 more
TL;DR: In this article, an immobilized Cu2O/g-C3N4 heterojunction film was successfully made on an FTO substrate by electrophoretic deposition of g-C 3N4 on a Cu 2O thin film.
Journal ArticleDOI
Black phosphorus: an efficient co-catalyst for charge separation and enhanced photocatalytic hydrogen evolution
Jiahao Wu,Shaolong Huang,Zhengyuan Jin,Jiaqi Chen,Liang Hu,Yaojia Long,Jianguo Lu,Shuangchen Ruan,Yu-Jia Zeng +8 more
TL;DR: In this paper, a 2D surface hydroxyl-loaded BP was used as a broadband photocatalyst by forming type II heterostructures with other widebandgap semiconductors.
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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