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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A computational study on water adsorption on Cu2O(1 1 1) surfaces: The effects of coverage and oxygen defect
TL;DR: In this paper, the spin-polarized density functional theory was used to investigate water adsorption on the clean and defective Cu2O(1 1/1/1) surfaces.
Journal ArticleDOI
Hierarchical Cu2O photocathodes with nano/microspheres for solar hydrogen generation
TL;DR: A hierarchical p-type Cu2O film with nano/microspheres on copper foil was successfully synthesized via a facile and cost-effective liquid reduction route through transformation of a lotus-like CuO/Cu(OH)2 nanosheet/nanowire structure as discussed by the authors.
Journal ArticleDOI
Rapid Flame-Annealed CuFe2O4 as Efficient Photocathode for Photoelectrochemical Hydrogen Production
Sangwook Park,Ji Hyun Baek,Ji Hyun Baek,Liang Zhang,Jae Myeong Lee,Kevin H. Stone,In Sun Cho,Jinghua Guo,Hyun Suk Jung,Xiaolin Zheng +9 more
TL;DR: Copper ferrite (CuFe2O4) possesses an indirect bandgap in the range of 1.54-1.95 eV as mentioned in this paper, and is used as an attractive p-type photocathode in photoelectrochemical (PEC) water splitting.
Journal ArticleDOI
Simultaneous glucose sensing and biohydrogen evolution from direct photoelectrocatalytic glucose oxidation on robust Cu2O–TiO2 electrodes
Anitha Devadoss,Pitchaimuthu Sudhagar,C. Ravidhas,Ryota Hishinuma,Chiaki Terashima,Kazuya Nakata,Takeshi Kondo,Isao Shitanda,Makoto Yuasa,Akira Fujishima +9 more
TL;DR: Striking improvement of 30% in overall H2 gas evolution by photoholes assisted glucose oxidation opens a new platform in solar-driven PEC biohydrogen generation.
Journal ArticleDOI
Nanoporous Cu@Cu2O hybrid arrays enable photo-assisted supercapacitor with enhanced capacities
TL;DR: Wang et al. as discussed by the authors designed and fabricated a photo-assisted rechargeable supercapacitor by integrating photo-electrode and working electrode, thereby forming a nanoporous Cu@Cu 2O (NPC@Cu2O) hybrid array electrode, which obviously increases the charge capacity.
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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