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
Photoelectrochemical hydrogen production from water splitting using heterostructured nanowire arrays of Bi2O3/BiAl oxides as a photocathode
Pedro Emílio Amador Salomão,Danielle S. Gomes,Everson Junio da Cruz Ferreira,Francisco Moura,Lucas L. Nascimento,Antonio Otavio T. Patrocinio,Márcio C. Pereira +6 more
TL;DR: In this article, a Cu-free photocathode composed by a ternary heterostructure of Bi2O3/Al2Bi24O39/Al 2Bi48O75 nanowires is reported with a narrow band gap energy (1.83) and suitable conduction band edge potential (−0.98 VRHE) for water reduction to hydrogen.
Journal ArticleDOI
Hydrogel protection strategy to stabilize water-splitting photoelectrodes
Jeiwan Tan,Byung-Chul Kang,Kyung-Lim Kim,Donyoung Kang,Hyungsoo Lee,Sunihl Ma,Gyumin Jang,Hyungsuk Lee,Jooho Moon +8 more
Journal ArticleDOI
Eu modified Cu2O thin films: Significant enhancement in efficiency of photoelectrochemical processes through suppression of charge carrier recombination
Sanjib Shyamal,Paramita Hajra,Harahari Mandal,Aparajita Bera,Debasis Sariket,Ashis K. Satpati,M. V. Malashchonak,Alexander V. Mazanik,Olga V. Korolik,Anatoly I. Kulak,Ekaterina V. Skorb,Ekaterina V. Skorb,Arjun Maity,Arjun Maity,Eugene A. Streltsov,Chinmoy Bhattacharya +15 more
TL;DR: In this paper, the authors proposed a simple way to increase incident photon-to-current conversion efficiency (IPCE, Y) for electrodeposited p-type Cu2O films through addition of Eu(III) to the electrodeposition bath.
Journal ArticleDOI
3-Dimensional MWCNT/CuO nanostructures use as an electrochemical catalyst for oxygen evolution reaction
TL;DR: A facile and cost-effective method for the synthesis of 3D hierarchical structures of multiwalled carbon nanotubes (MWCNT)/CuO catalyst is reported in this paper.
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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