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
Photoelectrocatalytic performance of nanostructured p-n junction NtTiO2/NsCuO electrode in the selective conversion of CO2 to methanol at low bias potentials
TL;DR: In this paper, a p-n junction semiconductor was constructed based on CuO nanospheres (NsCuO) deposited at TiO2 nanotubes (NtTiO2).
Journal ArticleDOI
Cu2O/CuO heterojunction catalysts through atmospheric pressure plasma induced defect passivation
Avishek Dey,Gauthaman Chandrabose,Lois A. O. Damptey,E. S. Erakulan,Ranjit Thapa,Siarhei Zhuk,Goutam Kumar Dalapati,Goutam Kumar Dalapati,Goutam Kumar Dalapati,Seeram Ramakrishna,Nicholas Braithwaite,Amir A. Shirzadi,Satheesh Krishnamurthy +12 more
TL;DR: In this paper, an atmospheric pressure plasma jet (APPJ) was used to fabricate Cu2O/CuO heterojunction electrodes, which showed remarkable currents and stability towards oxygen evolution reaction (OER) (6.8 V vs SCE in 1 M KOH without compensating for the electrode electrolyte surface resistance.
Journal ArticleDOI
Study of Copper Ferrite as a Novel Photocathode for Water Reduction: Improving Its Photoactivity by Electrochemical Pretreatment.
TL;DR: Although the photocurrents are modest, these results point to the possibility of using CuFe2 O4 as a photocathode material in water-splitting devices and the strategy employed for the enhancement in the CuFe 2 O4 photoactivity could be extended to other photocathodes materials.
Journal ArticleDOI
Low-Temperature Atomic Layer Deposition of Cobalt Oxide as an Effective Catalyst for Photoelectrochemical Water-Splitting Devices
Jiyeon Kim,Tomi Iivonen,Jani Hämäläinen,Marianna Kemell,Kristoffer Meinander,Kenichiro Mizohata,Lidong Wang,Jyrki Räisänen,Radim Beranek,Radim Beranek,Markku Leskelä,Anjana Devi +11 more
TL;DR: In this article, a low-temperature atomic layer deposition (ALD) process was developed for depositing crystalline and phase pure spinel cobalt oxide (Co3O4) films at 120 °C using [Co(tBu2DAD)2] and ozone as coreagent.
Journal ArticleDOI
Hole conductivity and acceptor density of p-type CuGaO2 nanoparticles determined by impedance spectroscopy: The effect of Mg doping
Isaac Herraiz-Cardona,Francisco Fabregat-Santiago,Adèle Renaud,Beatriz Julián-López,Fabrice Odobel,Fabrice Odobel,Laurent Cario,Stéphane Jobic,Sixto Gimenez +8 more
TL;DR: In this article, the hole conductivity of mesoporous CuGaO2 nanoparticles has been investigated using impedance spectroscopy, extracting values ranging from 1 to 10 × S cm−1 in the interval of applied bias tested.
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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