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
Aqueous‐Solution Route to Zinc Telluride Films for Application to CO2 Reduction
Ji-Wook Jang,Seungho Cho,Ganesan Magesh,Youn Jeong Jang,Jae Young Kim,Won Yong Kim,Jeong Kon Seo,Sungjee Kim,Kun-Hong Lee,Jae Sung Lee +9 more
TL;DR: As a photocathode for CO2 reduction, zinc-blende zinc telluride (ZnTe) was directly formed on a Zn/ZnO nanowire substrate by a simple dissolution-recrystallization mechanism without any surfactant to show efficient and stable CO formation in photoelectrochemical CO2 Reduction at -0.2--0.7 V versus RHE without a sacrificial reagent.
Journal ArticleDOI
Cu2O/CuO photocathode with improved stability for photoelectrochemical water reduction
TL;DR: In this paper, a p-type cuprous oxide (Cu2O) photocathode with a thin layer of cupric oxide (cuO) was prepared by fast annealing of a copper foil via H2-O2 flame.
Journal ArticleDOI
Direct Solar Charging of an Organic-Inorganic, Stable, and Aqueous Alkaline Redox Flow Battery with a Hematite Photoanode.
TL;DR: The first solar aqueous alkaline redox flow battery using low cost and environmentally safe materials is demonstrated, and Photovoltage enhancement strategies are demonstrated for the ferrocyanide‐hematite junction, which decreases electron–hole recombination.
Journal ArticleDOI
Synthesis of novel Cu2O micro/nanostructural photocathode for solar water splitting
TL;DR: The hierarchical p-type Cu2O micro/nanostructural film on copper foil is successfully fabricated via a facile and cost-effective template route through transformation of lotus-like CuO/Cu(OH)2 nanosheet/nanowire structure for photoelectrochemical (PEC) hydrogen generation as discussed by the authors.
Journal ArticleDOI
Noble metal-free metal-organic framework-derived onion slice-type hollow cobalt sulfide nanostructures: Enhanced activity of CdS for improving photocatalytic hydrogen production
D. Praveen Kumar,Hanbit Park,Eun Hwa Kim,Sangyeob Hong,Madhusudana Gopannagari,D. Amaranatha Reddy,Tae Kyu Kim +6 more
TL;DR: In this paper, a metal-free MOF-derived onion slice-type hollow structured Co4S3 was developed and embedded with CdS nanoparticles for photocatalytic hydrogen production.
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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