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
Few-layer MoS2 flakes as hole-selective layer for solution-processed hybrid organic hydrogen-evolving photocathodes
Sebastiano Bellani,Leyla Najafi,Antonio Esau Del Rio Castillo,Andrea Capasso,Maria Rosa Antognazza,Francesco Bonaccorso +5 more
TL;DR: In this paper, Li-aided exfoliation of bulk counterpart was carried out to tune on-demand the MoS2 Fermi level in order to match the highest occupied molecular orbital level of the rr-P3HT, thus easing the hole collection at the electrode.
Journal ArticleDOI
Effect of annealing process on the heterostructure CuO/Cu 2 O as a highly efficient photocathode for photoelectrochemical water reduction
TL;DR: In this paper, the p-type heterostructure CuO/Cu 2 O photocathodes were successfully prepared via simply annealing the electrodeposited Cu 2 O on fluoride doped tin oxide (FTO) substrate.
Journal ArticleDOI
A transparent CdS@TiO2 nanotextile photoanode with boosted photoelectrocatalytic efficiency and stability
Long Liu,Long Liu,Huilin Hou,Lin Wang,Rui Xu,Yong Lei,Shaohua Shen,Dongjiang Yang,Dongjiang Yang,Weiyou Yang +9 more
TL;DR: It is verified that the introduced TiO2 nanoshells could limit the charge recombination, facilitate the charge separation, reduce the charge transfer resistance, and enhance the wettability of the electrodes, resulting in their significantly enhanced PEC performance.
Journal ArticleDOI
Enhanced photoresponse performance of self-powered UV–visible photodetectors based on ZnO/Cu2O/electrolyte heterojunctions via graphene incorporation
TL;DR: In this paper, a self-powered photoresponse performance of the ZnO NAs/graphene (G)/Cu2O photoanodes was improved by introducing graphene interlayers.
Journal ArticleDOI
Hierarchical 3C-SiC nanowires as stable photocatalyst for organic dye degradation under visible light irradiation
TL;DR: In this paper, 3C-SiC hierarchical nanowires with hierarchical structure were synthesized by sol-gel carbothermal reduction method and the photocatalytic property of SiC nanowsires was investigated.
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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