scholarly journals Efficient Suppression of Electron–Hole Recombination in Oxygen-Deficient Hydrogen-Treated TiO2 Nanowires for Photoelectrochemical Water Splitting

2013 ◽  
Vol 117 (48) ◽  
pp. 25837-25844 ◽  
Author(s):  
Federico M. Pesci ◽  
Gongming Wang ◽  
David R. Klug ◽  
Yat Li ◽  
Alexander J. Cowan
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Tio2 Nanowires ◽  
Electron Hole ◽  
Efficient Suppression ◽  
Hole Recombination

Acid Treatment Enables Suppression of Electron-Hole Recombination in Hematite for Photoelectrochemical Water Splitting

2016 ◽  
Vol 128 (10) ◽  
pp. 3464-3468 ◽  
Author(s):  
Yi Yang ◽  
Mark Forster ◽  
Yichuan Ling ◽  
Gongming Wang ◽  
Teng Zhai ◽  
...  
Keyword(s):  
Water Splitting ◽  
Acid Treatment ◽  
Photoelectrochemical Water Splitting ◽  
Electron Hole ◽  
Hole Recombination

Acid Treatment Enables Suppression of Electron-Hole Recombination in Hematite for Photoelectrochemical Water Splitting

2016 ◽  
Vol 55 (10) ◽  
pp. 3403-3407 ◽  
Author(s):  
Yi Yang ◽  
Mark Forster ◽  
Yichuan Ling ◽  
Gongming Wang ◽  
Teng Zhai ◽  
...  
Keyword(s):  
Water Splitting ◽  
Acid Treatment ◽  
Photoelectrochemical Water Splitting ◽  
Electron Hole ◽  
Hole Recombination

Au Nanostructure-Decorated TiO2 Nanowires Exhibiting Photoactivity Across Entire UV-visible Region for Photoelectrochemical Water Splitting

Nano Letters ◽  
2013 ◽  
Vol 13 (8) ◽  
pp. 3817-3823 ◽  
Author(s):  
Ying-Chih Pu ◽  
Gongming Wang ◽  
Kao-Der Chang ◽  
Yichuan Ling ◽  
Yin-Kai Lin ◽  
...  
Keyword(s):  
Water Splitting ◽  
Visible Region ◽  
Photoelectrochemical Water Splitting ◽  
Tio2 Nanowires ◽  
Uv Visible

scholarly journals Multilayer WO3/BiVO4 Photoanodes for Solar-Driven Water Splitting Prepared by RF-Plasma Sputtering

Surfaces ◽  
2020 ◽  
Vol 3 (1) ◽  
pp. 105-115 ◽  
Author(s):  
Matteo Pedroni ◽  
Gian Luca Chiarello ◽  
Espedito Vassallo ◽  
Elena Selli
Keyword(s):  
Water Splitting ◽  
Photocurrent Density ◽  
Rf Plasma ◽  
Back Side ◽  
Time Stability ◽  
Electron Hole ◽  
Plasma Sputtering ◽  
Innermost Layer ◽  
Carrier Separation ◽  
Hole Recombination

A series of WO3, BiVO4 and WO3/BiVO4 heterojunction coatings were deposited on fluorine-doped tin oxide (FTO), by means of reactive radio frequency (RF) plasma (co)sputtering, and tested as photoanodes for water splitting under simulated AM 1.5 G solar light in a three-electrode photoelectrochemical (PEC) cell in a 0.5 M NaSO4 electrolyte solution. The PEC performance and time stability of the heterojunction increases with an increase of the WO3 innermost layer up to 1000 nm. A two-step calcination treatment (600 °C after WO3 deposition followed by 400 °C after BiVO4 deposition) led to a most performing photoanode under back-side irradiation, generating a photocurrent density of 1.7 mA cm−2 at 1.4 V vs. SCE (i.e., two-fold and five-fold higher than that generated by individual WO3 and BiVO4 photoanodes, respectively). The incident photon to current efficiency (IPCE) measurements reveal the presence of two activity regions over the heterojunction with respect to WO3 alone: The PEC efficiency increases due to improved charge carrier separation above 450 nm (i.e., below the WO3 excitation energy), while it decreases below 450 nm (i.e., when both semiconductors are excited) due to electron–hole recombination at the interface of the two semiconductors.

Defect-rich decorated TiO2 nanowires for super-efficient photoelectrochemical water splitting driven by visible light

2015 ◽  
Vol 8 (11) ◽  
pp. 3363-3373 ◽  
Author(s):  
Md Anisur Rahman ◽  
Samad Bazargan ◽  
Saurabh Srivastava ◽  
Xiongyao Wang ◽  
Marwa Abd-Ellah ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Conversion Efficiency ◽  
Photoelectrochemical Water Splitting ◽  
Visible Light Region ◽  
Tio2 Nanowires ◽  
High Conversion Efficiency ◽  
Splitting Property ◽  
Onset Potential ◽  
Light Region

Defect-rich 1D TiO2 nanostructures show excellent photoelectrochemical water splitting property in the visible light region with a low onset potential of 0.3 V vs. RHE and a remarkably high conversion efficiency of 3.6%.

scholarly journals Efficient Photoelectrochemical Water Splitting by Tailoring MoS2/CoTe Heterojunction in a Photoelectrochemical Cell

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2341
Author(s):  
Effat Sitara ◽  
Habib Nasir ◽  
Asad Mumtaz ◽  
Muhammad Fahad Ehsan ◽  
Manzar Sohail ◽  
...  
Keyword(s):  
Water Splitting ◽  
Electrochemical Impedance ◽  
Linear Sweep Voltammetry ◽  
Photocurrent Density ◽  
Photoelectrochemical Water Splitting ◽  
Photoelectrochemical Cell ◽  
Electron Hole ◽  
Pair Separation ◽  
Electron Hole Pair ◽  
Electrochemical Impedance Spectroscopic

Solar energy conversion through photoelectrochemical water splitting (PEC) is an upcoming promising technique. MoS2/CoTe heterostructures were successfully prepared and utilized for PEC studies. MoS2 and CoTe were prepared by a hydrothermal method which were then ultrasonicated with wt. % ratios of 1:3, 1:1 and 3:1 to prepare MoS2/CoTe (1:3), MoS2/CoTe (1:1) and MoS2/CoTe (3:1) heterostructure, respectively. The pure materials and heterostructures were characterized by XRD, UV–vis-DRS, SEM, XPS, PL and Raman spectroscopy. Photoelectrochemical measurements were carried out by linear sweep voltammetry and electrochemical impedance spectroscopic measurements. A maximum photocurrent density of 2.791 mA/cm2 was observed for the MoS2/CoTe (1:1) heterojunction which is about 11 times higher than the pristine MoS2. This current density was obtained at an applied bias of 0.62 V vs. Ag/AgCl (1.23 V vs. RHE) under the light intensity of 100 mW/cm2 of AM 1.5G illumination. The enhanced photocurrent density may be attributed to the efficient electron–hole pair separation. The solar to hydrogen conversion efficiency was found to be 0.84% for 1:1 MoS2/CoTe, signifying the efficient formation of the p-n junction. This study offers a novel heterojunction photocatalyst, for PEC water splitting.

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