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
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Enhanced photoelectrochemical activity and photocatalytic water oxidation of NiO nanoparticle-decorated SrTiO3 nanocube heterostructures: Interaction, interfacial charge transfer and enhanced mechanism
Wenzhong Wang,Weiwei Zhang,Chenchun Hao,Fei Wu,Yujie Liang,Honglong Shi,Jun Wang,Ting Zhang,Yuqi Hua +8 more
TL;DR: In this paper, the p-NiO@n-STO nanoparticle@nanocube nanostructures were fabricated by calcining Ni(NO3)2-loaded STO nanocubes and showed that intimate p-n junctions are formed between n-type STO and p-type NiO interfaces.
Journal ArticleDOI
One-step molten-salt synthesis of anatase/rutile bi-phase TiO2@MoS2 hierarchical photocatalysts for enhanced solar-driven hydrogen generation
TL;DR: In this paper, an anatase/Rutile biphasic TiO2 nanoparticles@MoS2 nanosheets (ARM) heterojunctions were constructed via one-step pyrolysis of TiO(OH)2 and (NH4)2MoS4 in LiCl-KCl molten salt.
Journal ArticleDOI
Facile fabrication and photoelectrochemical properties of a one axis-oriented NiO thin film with a (111) dominant facet
Chang Woo Kim,Young Seok Son,Amol U. Pawar,Myoung Jong Kang,Jin You Zheng,Vivek Sharma,Paritosh Mohanty,Young Soo Kang +7 more
TL;DR: In this article, a mesoporous NiO thin film with an exposed (111) dominant facet has been fabricated and analyzed for use as a photoelectrode, which shows an enhanced photocathodic electrode activity with a photocurrent density of 0.38 mA cm−2.
Journal ArticleDOI
Photoelectrochemical stability improvement of cuprous oxide (Cu2O) thin films in aqueous solution
TL;DR: In this paper, the photoelectrochemical stability of cuprous oxide (Cu2O) is improved by using the p-type Cu2O films containing metallic copper inclusions, which are electrodeposited by controlling the concentration of sodium dodecyl sulfate in the plating solutions.
Journal ArticleDOI
Study on copper oxide stability in photoelectrochemical cell composed of nanostructured TiO2 and CuxO electrodes
Jurga Juodkazytė,Benjaminas Šebeka,Irena Savickaja,Arūnas Jagminas,Vitalija Jasulaitienė,Algirdas Selskis,Jelena Kovger,P. Mack +7 more
TL;DR: In this paper, the performance of photoelectrochemical cell composed of nanostructured Cu x O and TiO 2 photo electrodes shortcircuited in side by side configuration in 0.1 M KOH is investigated with the purpose to test the stability of Cu/Cu x O photocathode.
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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