Electrochemical tuning of heterojunctions in TiO2 nanotubes for efficient solar water splitting

2019 ◽  
Vol 9 (19) ◽  
pp. 5425-5432 ◽  
Author(s):  
L. K. Preethi ◽  
Tom Mathews
Keyword(s):  
Water Splitting ◽  
Tio2 Nanotubes ◽  
Hydrogen Generation ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Photocatalytic Hydrogen Generation ◽  
Electrochemical Tuning

The electrochemical assisted biphase ↔ triphase switching in TiO2 nanotubes and their comprehensive photocatalytic hydrogen generation efficiencies are presented.

scholarly journals Hydrogen generation by solar water splitting using p-InGaN photoelectrochemical cells

2010 ◽  
Vol 96 (5) ◽  
pp. 052110 ◽  
Author(s):  
K. Aryal ◽  
B. N. Pantha ◽  
J. Li ◽  
J. Y. Lin ◽  
H. X. Jiang
Keyword(s):  
Water Splitting ◽  
Hydrogen Generation ◽  
Photoelectrochemical Cells ◽  
Solar Water ◽  
Solar Water Splitting

Decoupling Hydrogen Production and Water Oxidation in a Hybrid Solar-Driven Vanadium Redox Cell Supported By a Bipolar Membrane with Earth-Abundant Catalysts

2018 ◽  
Vol MA2018-01 (31) ◽  
pp. 1864-1864
Author(s):  
Chengxiang("CX") Xiang
Keyword(s):  
Water Splitting ◽  
Water Oxidation ◽  
Cathode Surface ◽  
Hydrogen Generation ◽  
Anode Surface ◽  
Faradaic Efficiency ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Hydrogen Molecules ◽  
Vanadium Redox

Renewable hydrogen produced by solar water-splitting has the potential to balance the intermittent nature of the sunlight and support grid-scale energy storage. In a solar-driven water-splitting device, the cathode surface and the anode surface involve hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), which are tightly coupled with each other, that is, whenever one oxygen molecule was produced at the cathode surface, two hydrogen molecules were produced at the anode surface at the same time. In this talk, I will show some recent results on an alternative approach to solar water-splitting, where the electron and proton generated at OER was used to charge an aqueous vanadium solution in a 2.0 M sulfuric acid (pH = -0.16) electrolyte with near unity Faradaic efficiency, rather than being used directly to produce hydrogen at the cathode. The produced V2+ species in the cathode chamber was then passed through a MoCx based catalyst to produce hydrogen and to re-generate V3+ for the subsequent reduction, with an average hydrogen generation efficiency of 85% at different depths of charging. Coupled to a solar tracker, the solar-driven vanadium redox cell was charged outdoors under real-world illumination during the day and discharged at night to produce hydrogen with a daily average solar to hydrogen (STH) conversion efficiency of 5.8%.

scholarly journals Solvent-controlled O2 diffusion enables air-tolerant solar hydrogen generation

2021 ◽  
Author(s):  
Michael G Allan ◽  
Morgan J McKee ◽  
Frank Marken ◽  
Moritz F Kuehnel
Keyword(s):  
Water Splitting ◽  
Hydrogen Generation ◽  
Renewable Fuels ◽  
Solar Hydrogen ◽  
Solar Water ◽  
Solar Water Splitting ◽  
O2 Diffusion

Solar water splitting into H2 and O2 is a promising approach to provide renewable fuels. However, the presence of O2 hampers H2 generation and most photocatalysts show a major drop...

scholarly journals A Study on Doped Heterojunctions in TiO2 Nanotubes: An Efficient Photocatalyst for Solar Water Splitting

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
L. K. Preethi ◽  
Rajini P. Antony ◽  
Tom Mathews ◽  
Lukasz Walczak ◽  
Chinnakonda S. Gopinath
Keyword(s):  
Water Splitting ◽  
Tio2 Nanotubes ◽  
Solar Water ◽  
Solar Water Splitting

scholarly journals TiO2 Nanotubes for Solar Water Splitting: Vacuum Annealing and Zr Doping Enhance Water Oxidation Kinetics

ACS Omega ◽  
2019 ◽  
Vol 4 (14) ◽  
pp. 16095-16102 ◽  
Author(s):  
Maged N. Shaddad ◽  
Drialys Cardenas-Morcoso ◽  
Miguel García-Tecedor ◽  
Francisco Fabregat-Santiago ◽  
Juan Bisquert ◽  
...  
Keyword(s):  
Water Splitting ◽  
Water Oxidation ◽  
Oxidation Kinetics ◽  
Tio2 Nanotubes ◽  
Vacuum Annealing ◽  
Solar Water ◽  
Solar Water Splitting

scholarly journals Enhanced Solar Water Splitting Performance of 50-100 nm Pore Sized TiO2 Nanotubes

2019 ◽  
Vol 31 (3) ◽  
pp. 559-565
Author(s):  
K. Kathiresan ◽  
P. Elangovan ◽  
M.S.S. Saravanakumaar
Keyword(s):  
Water Splitting ◽  
Photoelectron Spectroscopy ◽  
Hydrofluoric Acid ◽  
Tio2 Nanotubes ◽  
Uv Light ◽  
Photoelectrochemical Performance ◽  
X Ray ◽  
Solar Water ◽  
Solar Water Splitting ◽  
The Impact

Herein, we report the fabrication of titanium dioxide nanotubes via anodization technique through with and without hydrofluoric acid . The impact of hydrofluoric acid followed by annealing effect on TiO2 nanotubes for the solar water splitting performance was examined. Prepared TiO2 samples exhibited a diameter of about 50 to 100 nm sized nanotubes and hierarchical structures and they subjected to annealing. Synthesis and annealing effects on chemical, physical and photoelectrochemical water splitting activity of TiO2 samples were scrutinized. The crystalline nature, structure and surface morphologies of prepared TiO2 photocatalysts were explored by X-ray diffraction, scanning electron microscope, and the oxidation states of both titanium and oxygen was determined by X-ray photoelectron spectroscopy. As a consequence, after annealing at 500 ºC, TiO2 thin films treated with hydrofluoric acid solution (HF-TiO2) were found to exhibit a remarkable photoelectrochemical performance than bare TiO2 nanotubes under UV light irradiation. Moreover, the mechanistic insights acquired in the current research would be beneficial to design a novel and highly efficient photocatalyst for solar water splitting systems.

Band engineered Al-rich InAlN thin films as a promising photoanode for hydrogen generation from solar water splitting

2018 ◽  
Vol 185 ◽  
pp. 445-455 ◽  
Author(s):  
Mahdi Alizadeh ◽  
Goh Boon Tong ◽  
Muhammad Shahid Mehmood ◽  
Karwan Wasman Qader ◽  
Saadah Abdul Rahman ◽  
...  
Keyword(s):  
Thin Films ◽  
Water Splitting ◽  
Hydrogen Generation ◽  
Solar Water ◽  
Solar Water Splitting

Hydrogen Generation by Solar Water Splitting Using 2D Nanomaterials

Solar RRL ◽  
2020 ◽  
Vol 4 (8) ◽  
pp. 2000050 ◽  
Author(s):  
Mohd Monis Ayyub ◽  
Reetendra Singh ◽  
Chintamani Nagesa Ramachandra Rao
Keyword(s):  
Water Splitting ◽  
Hydrogen Generation ◽  
Solar Water ◽  
Solar Water Splitting ◽  
2D Nanomaterials
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