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
Stabilized Solar Hydrogen Production with CuO/CdS Heterojunction Thin Film Photocathodes
TL;DR: In this article, the authors showed that deposition of an n-type CdS buffer layer underneath a protective TiO2 layer yielded a stable and efficient photoelectrode, with the champion electrode giving 1.68 mA cm-2 at 0 VRHE and an onset potential of ca. 0.45 VRHE.
Journal ArticleDOI
Cu2O as an emerging photocathode for solar water splitting - A status review
Indrajit V. Bagal,Nilesh R. Chodankar,Mostafa Afifi Hassan,Aadil Waseem,Muhammad Ali Johar,Do-Heyoung Kim,Sang-Wan Ryu +6 more
TL;DR: Recently, cuprous oxide (Cu2O) based photocathodes have gained research attention for hydrogen (H2) production through photoelectrochemical (PEC) water splitting reactions due to marginally lower synthesis cost and low energy intensity fabrication processes as mentioned in this paper.
Journal ArticleDOI
Dynamic Interaction Between Methylammonium Lead Iodide and TiO2 Nanocrystals Leads to Enhanced Photocatalytic H2 Evolution from HI Splitting
Xiaomei Wang,Xiaomei Wang,Hong Wang,Hong Wang,Hefeng Zhang,Hefeng Zhang,Wei Yu,Xiuli Wang,Yue Zhao,Yue Zhao,Xu Zong,Can Li +11 more
TL;DR: In this article, Pt/TiO2 nanoparticles were hybridized with methylammonium lead iodide (MAPbI3), creating dynamically existing electron-transporting channels between the two components.
Journal ArticleDOI
Defect Modulation of Z‑Scheme TiO 2 /Cu 2 O Photocatalysts for Durable Water Splitting
TL;DR: Although possessing high activity for solar hydrogen production, exploring robust Cu2O-based photocatalysts remains a challenging task due to its intrinsic drawback of susceptible oxidation as mentioned in this paper...
Journal ArticleDOI
In situ photo-assisted deposition of MoS 2 electrocatalyst onto zinc cadmium sulphide nanoparticle surfaces to construct an efficient photocatalyst for hydrogen generation
Mai Nguyen,Phong D. Tran,Stevin S. Pramana,Rui Lin Lee,Sudip Kumar Batabyal,Nripan Mathews,Lydia Helena Wong,Michael Graetzel,Michael Graetzel +8 more
TL;DR: A facile and scalable preparation process for MoS(2)-decorated Zn(x)Cd(1-x)S hybrid photocatalysts for hydrogen generation and the most impressive catalytic enhancement ever recorded for a semiconductor photocatalyst decorated with a noble metal free electrocatalyst is reported.
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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