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
A facile strategy for crystal engineering of Cu2O polyhedrons with high-index facets
Xiaopeng Wang,Xiaopeng Wang,Shuhong Jiao,Dapeng Wu,Dapeng Wu,Qi Li,Jianguo Zhou,Kai Jiang,Dongsheng Xu +8 more
TL;DR: A facile strategy for crystal engineering of Cu2O polyhedrons with high-index facets has been developed in the system of CuSO4/NaOH/ascorbic acid as mentioned in this paper.
Journal ArticleDOI
Copper Deficiency in the p-Type Semiconductor Cu1–xNb3O8
Nacole King,Prangya Parimita Sahoo,Lindsay Fuoco,Sean Stuart,Daniel B. Dougherty,Yi Liu,Paul A. Maggard +6 more
TL;DR: The p-type semiconductor CuNb3O8 has been synthesized by solid-state and flux reactions and investigated for the effects of copper extrusion from its structure at 250-750 °C in air.
Journal ArticleDOI
Porous cerium dioxide hollow spheres and their photocatalytic performance
Saisai Yuan,Saisai Yuan,Qitao Zhang,Qitao Zhang,Bin Xu,Bin Xu,Zhengyuan Jin,Ya Zhang,Yin Yang,Ming Zhang,Teruhisa Ohno,Teruhisa Ohno +11 more
TL;DR: In this paper, a uniform-sized and monodiperse cerium dioxide porous hollow spheres (CeO2-PH) based on the Ostwald ripening process were fabricated by a simple solvothermal method in the absence of any templates.
Journal ArticleDOI
Screened coulomb hybrid DFT investigation of band gap and optical absorption predictions of CuVO3, CuNbO3 and Cu5Ta11O30 materials
TL;DR: Interestingly, CuVO3 with its predicted small indirect band gap of 1.4 eV shows the highest absorption coefficient in the visible range with a broad absorption edge extending to 886 nm, which offers a great opportunity for this material to be an excellent candidate for solar cell applications.
Journal ArticleDOI
Microbial Photoelectrosynthesis for Self-Sustaining Hydrogen Generation.
TL;DR: A self-sustaining microbial photoelectrosynthesis (MPES) system that pairs microbial electrochemical oxidation withphotoelectrochemical water reduction for energy efficient H2 generation and reduces the overall energy requirements thereby greatly expanding the range of semiconductors that can be utilized in APS.
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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