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
Freestanding atomically-thin cuprous oxide sheets for improved visible-light photoelectrochemical water splitting
Shan Gao,Yongfu Sun,Fengcai Lei,Jiawei Liu,Liang Liang,Tanwei Li,Bicai Pan,Jingfang Zhou,Yi Xie +8 more
TL;DR: In this article, a versatile rapid-heating strategy is proposed and applied, in which the lamellar hybrid intermediate transforms into the clean and freestanding atomically-thin non-layered Cu 2 O sheet with 4 atomic thicknesses at 300°C in less than 8min.
Journal ArticleDOI
Counter Electrodes for Dye-Sensitized Solar Cells
TL;DR: In this article, the authors present researches about different counter electrodes including metals such as platinum, gold and nickel, nanostructured carbon materials, and conductive polymers.
Journal ArticleDOI
Sn-doped hematite films as photoanodes for efficient photoelectrochemical water oxidation
Dong-Dong Qin,Yun-Lei Li,Ting Wang,Yang Li,Lu Xiaoquan,Jing Gu,Yixin Zhao,Yu-Min Song,Chun-Lan Tao +8 more
TL;DR: A high photocurrent of ∼2.8 mA cm−2 at 1.24 V vs. RHE and a conversion efficiency of 0.24% are achieved as discussed by the authors.
Journal ArticleDOI
Synthesis of CuInS2 nanowire arrays via solution transformation of Cu2S self-template for enhanced photoelectrochemical performance
TL;DR: In this article, a universal solution method has been proposed to prepare CuInS 2 nanowire arrays (NWAs) using Cu 2 S NWAs as the template, which can be used to prepare other copper chalcopyrite-based NWAs for highly efficient PEC water splitting.
Journal ArticleDOI
Semiconductor, molecular and hybrid systems for photoelectrochemical solar fuel production
TL;DR: The paper shortly reviews the basic direct approaches applied in searching for viable solutions to solar fuel production, generally distinguished in molecular and semiconductor (non-molecular) systems, however, hybrid strategies, proposed recently, have also been included.
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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