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
Revealing the Performance-Limiting Factors in α‑SnWO 4 Photoanodes for Solar Water Splitting
Moritz Kölbach,Inês Jordão Pereira,Karsten Harbauer,Paul Plate,Katja Höflich,Sean P. Berglund,Dennis Friedrich,Roel van de Krol,Roel van de Krol,Fatwa F. Abdi +9 more
TL;DR: In this paper, phase-pure α-SnWO4 films are successfully prepared by pulsed laser deposition, and key carrier transport properties, such as charge carrier mobility, lifetime, and diffusion length are reported for the first time.
Journal ArticleDOI
Investigation and mitigation of degradation mechanisms in Cu2O photoelectrodes for CO2 reduction to ethylene
Guiji Liu,Fan Zheng,Junrui Li,Junrui Li,Guosong Zeng,Yifan Ye,David M. Larson,Junko Yano,Ethan J. Crumlin,Joel W. Ager,Lin-Wang Wang,Francesca M. Toma +11 more
TL;DR: In this paper, the degradation pathways of cuprous oxide photoelectrodes for ethylene synthesis were investigated and a protection scheme was proposed to mitigate these degradation pathways by using a silver catalyst and a Z-scheme heterojunction to extract holes.
Journal ArticleDOI
A Method for Synthesis of Renewable Cu2O Junction Composite Electrodes and Their Photoelectrochemical Properties
TL;DR: In this paper, a copper oxide composite photo-electrode with improved stability and photoelectrochemical performance brought about by a simple cycle of heat treatment and cathodic reduction is presented.
Journal ArticleDOI
Bottom-up assembly of hierarchical Cu2O nanospheres: controllable synthesis, formation mechanism and enhanced photochemical activities
TL;DR: In this paper, a facile additive-assisted complex-precursor solution method is demonstrated for one-pot assembly of well-defined hierarchical Cu2O nanospheres with tunable sizes and shapes.
Journal ArticleDOI
Liquid Hydrocarbon Production from CO2 : Recent Development in Metal-Based Electrocatalysis.
TL;DR: This Minireview presents the current high-performing catalysts for the electrochemical reduction of CO2 to liquid hydrocarbons, address the limitations and unify the current understanding of the different reaction mechanisms.
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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