Photoelectrochemical H2 evolution using TiO2-coated CaFe2O4 without an external applied bias under visible light irradiation at 470 nm based on device modeling
Literature Information
Takamitsu Futagami, Takaaki Sakai, Motonori Watanabe
CaFe2O4 (CFO) can be used as a photocathode to evolve H2 from water in a photoelectrochemical cell. However, CFO degrades during operation and an external voltage is necessary for PEC H2 evolution because the onset potential is less than the potential required for water oxidation considering the overpotential at the counter electrode. In order to develop a reliable CFO electrode with a greater onset potential, improvement of chemical stability and suppression of surface recombination is necessary. In this study, a chemically stable electrode structure with a greater onset potential was achieved by coating the [00l]-oriented CFO with a thin layer of titanium dioxide (TiO2). A CFO|TiO2 electrode was designed using a device simulator. The simulation results predict that coating CFO with TiO2 produces a positive or negative shift in the onset potential under visible and ultraviolet light irradiation, respectively. The experimental onset potentials matched the simulation prediction. The observed onset potential for TiO2-coated CFO was around (1.6 V vs. RHE) under visible light (470 nm) and 0.9 V under ultraviolet light (300 nm), compared to 1.2–1.3 V vs. RHE for a bare CFO electrode. The onset potential (1.6 V) under visible light irradiation is the most positive onset potential among the oxide photocathodes ever reported for PEC water splitting. Using the TiO2-coated CFO as the photocathode and RuO2-loaded Pt as the anode, stable photocurrent was observed under 470 nm excitation without an external voltage and evolution of H2 from the system was confirmed.
Related Literature
Mid-infrared absorption of trapped electrons in titanium(iv) oxide particles using a photoacoustic FTIR technique
Tatsuki Shinoda
DOI: 10.1039/C8CP04885A
Effect of nano-pillared surfaces with an arrangement density gradient on droplet coalescence dynamics
Tao Li, MingYu Li, JunJun Wang, Jie Li, YunRui Duan, Hui Li
DOI: 10.1039/C8CP05014G
Pure spin current and phonon thermoelectric transport in a triangulene-based molecular junction
Jianwei Li, Yihang Nie, Fuming Xu, Yunjin Yu, Bin Wang
DOI: 10.1039/C8CP02322K
Electrocatalytic studies on imidazolium based ionic liquids: defining experimental conditions
Miguel A. Montiel, José Solla-Gullón, Vicente Montiel, Carlos M. Sánchez-Sánchez
DOI: 10.1039/C8CP02662A
The effect of hydration on the electronic structure and stability of the superalkali cation Li3+
Jia-Huan Hou, Di Wu, Jia-Yuan Liu, Si-Yi Li, Dan Yu, Ying Li
DOI: 10.1039/C8CP00862K
Effect of oscillation dynamics on long-range electron transfer in a helical peptide monolayer
Daisuke Matsushita, Hirotaka Uji, Shunsaku Kimura
DOI: 10.1039/C8CP02315H
Insights into the complex interaction between hydrophilic nanoparticles and ionic surfactants at the liquid/air interface
Jingyu Jin, Xiaoyan Li, Jiafeng Geng, Dengwei Jing
DOI: 10.1039/C8CP01838C
Strain and defect engineering on phase transition of monolayer black phosphorene
Yan Chen, Xiaoyang Shi, Mingjia Li, Yilun Liu
DOI: 10.1039/C8CP01334A
You might also like
Is 2-(2-chloroacetamido)-3-phenylpropanoic acid (CAS: 7765-11-9) safe?
2-(2-Chloroacetamido)-3-phenylpropanoic acid (CAS: 7765-11-9) is generally consi...
Is 2-(Benzyloxy)-5-bromobenzoic acid (CAS: 62176-31-2) safe?
2-(Benzyloxy)-5-bromobenzoic acid can be handled safely if appropriate precautio...
What is (4-Methyl-1,2,5-oxadiazol-3-yl)methanamine hydrochloride (CAS: 1159825-48-5)?
(4-Methyl-1,2,5-oxadiazol-3-yl)methanamine hydrochloride is a chemical compound ...
What is 2-(5-Hexylthiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS: 917985-54-7)?
2-(5-Hexylthiophen-2-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (CAS: 917985-54...
Are there alternatives to 4-(8-Methyl-9H-1,3-dioxolo[4,5-h][2,3]benzodiazepin-5-yl)benzenamine (CAS: 102771-26-6) in synthesis?
While 4-(8-Methyl-9H-1,3-dioxolo[4,5-h][2,3]benzodiazepin-5-yl)benzenamine (CAS:...
What is the market or research trend for tert-butyl 3-hydroxy-4,5,7,8-tetrahydro-2H-pyrazolo[3,4-d]azepine-6-carboxylate (CAS: 851376-80-2)?
The market for tert-butyl 3-hydroxy-4,5,7,8-tetrahydro-2H-pyrazolo[3,4-d]azepine...
How should waste containing 3,5-Diamino-1H-pyrazole-4-carbonitrile (CAS: 6844-58-2) be handled?
Waste containing 3,5-Diamino-1H-pyrazole-4-carbonitrile (CAS: 6844-58-2) should ...
How is (6-Fluoro-3-pyridinyl)boronic acid (CAS: 351019-18-6) typically synthesized?
(6-Fluoro-3-pyridinyl)boronic acid can be synthesized through the reaction of 6-...
What industries use Dibenzyl carbonimidoylbiscarbamate (CAS: 10065-79-9)?
Dibenzyl carbonimidoylbiscarbamate (CAS: 10065-79-9) finds applications in vario...
What is the market or research trend for (beta,beta,2,3,4,5,6-~2~H_7_)Phenylalanine (CAS: 74228-83-4)?
The market for (beta,beta,2,3,4,5,6-~2~H_7_)Phenylalanine (CAS: 74228-83-4) is g...















