Low-Symmetry Mesoporous Titanium Dioxide (lsm-TiO2) Electrocatalyst for Efficient and Durable Oxygen Evolution in Aqueous Alkali

2018 ◽  
Vol 165 (7) ◽  
pp. H300-H309 ◽  
Author(s):  
Mabrook S. Amer ◽  
Mohamed A. Ghanem ◽  
Abdullah M. Al-Mayouf ◽  
Prabhakarn Arunachalam
Keyword(s):  
Titanium Dioxide ◽  
Oxygen Evolution ◽  
Aqueous Alkali ◽  
Mesoporous Titanium Dioxide ◽  
Low Symmetry

scholarly journals Bifunctional Electrocatalyst of Low-Symmetry Mesoporous Titanium Dioxide Modified with Cobalt Oxide for Oxygen Evolution and Reduction Reactions

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 836
Author(s):  
Mabrook S. Amer ◽  
Mohamed A. Ghanem ◽  
Prabhakarn Arunachalam ◽  
Abdullah M. Al-Mayouf ◽  
Sultan M. Hadadi
Keyword(s):  
Titanium Dioxide ◽  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Synergetic Effect ◽  
Oxide Nanoparticles ◽  
Charge Carrier Density ◽  
X Ray ◽  
Cobalt Oxide Nanoparticles ◽  
Mesoporous Titanium Dioxide ◽  
Low Symmetry

Hybrids of low-symmetry (disordered) mesoporous titanium dioxide modified with different weight ratios of cobalt oxide nanoparticles (Co3O4(x)/lsm-TiO2) are prepared using a one-pot self-assembly surfactant template. The physicochemical characterization of Co3O4(x)/lsm-TiO2 hybrids by scanning and transmission electron microscopy, X-ray diffraction, N2 adsorption–desorption isotherms, and X-ray photoelectron spectroscopy confirm the successful incorporation of cobalt oxide nanoparticles (2–3 nm in diameter) with preservation of the highly mesoporous structure of titanium dioxide substrate. Among these mesoporous hybrids, the ~3.0 wt.% Co3O4/lsm-TiO2 exhibits the best performance toward both the oxygen evolution (OER) and reduction (ORR) reactions in alkaline solution. For the OER, the hybrid shows oxidation overpotential of 348 mV at 10 mA cm−2, a turnover frequency (TOF) of 0.034 s−1, a Tafel slope of 54 mV dec−1, and mass activity of 42.0 A g−1 at 370 mV. While for ORR, an onset potential of 0.84 V vs. RHE and OER/ORR overpotential gap (ΔE) of 0.92 V are achieved which is significantly lower than that of commercial Pt/C, hexagonal mesoporous, and bulk titanium dioxide analogous. The Co3O4/lsm-TiO2 hybrid demonstrates significantly higher long-term durability than IrO2. Apparently, such catalytic activity performance originates from the synergetic effect between Co3O4 and TiO2 substrate, in addition to higher charge carrier density and the presence of disordered mesopores which provide short ions diffusion path during the electrocatalytic process.

Modification Of Mesoporous Titanium Dioxide With Cobalt Oxide Electrocatalyst For Enhanced Oxygen Evolution Reaction

2018 ◽  
Vol 10 (2) ◽  
pp. 136-144
Author(s):  
Mabrook S. Amer ◽  
◽  
Mohamed A. Ghanem ◽  
Prabhakarn Arunachalam ◽  
Abdullah M. Al-Mayouf ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Cobalt Oxide ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Mesoporous Titanium Dioxide

Potassium and iodide codoped mesoporous titanium dioxide for enhancing photocatalytic degradation of phenolic compounds

2021 ◽  
Vol 767 ◽  
pp. 138367
Author(s):  
Hengjun Gai ◽  
Haozhong Wang ◽  
Lei Liu ◽  
Bingxiao Feng ◽  
Meng Xiao ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Phenolic Compounds ◽  
Photocatalytic Degradation ◽  
Mesoporous Titanium Dioxide

Synthesis and photoelectrochemical studies of N, Zr co-doped mesoporous titanium dioxide

2015 ◽  
Vol 736 ◽  
pp. 93-100 ◽  
Author(s):  
Haijin Liu ◽  
Sapanbir S. Thind ◽  
Guosheng Wu ◽  
Jiali Wen ◽  
Aicheng Chen
Keyword(s):  
Titanium Dioxide ◽  
Mesoporous Titanium Dioxide ◽  
Photoelectrochemical Studies ◽  
Co Doped

Adsorption of Sr(II) cations onto phosphated mesoporous titanium dioxide: Mechanism, isotherm and kinetics studies

2019 ◽  
Vol 7 (6) ◽  
pp. 103430 ◽  
Author(s):  
Ivan Mironyuk ◽  
Tetiana Tatarchuk ◽  
Hanna Vasylyeva ◽  
Mu. Naushad ◽  
Igor Mykytyn
Keyword(s):  
Titanium Dioxide ◽  
Kinetics Studies ◽  
Mesoporous Titanium Dioxide

Mesoporous titanium dioxide: sonochemical synthesis and application in dye-sensitized solar cells

2001 ◽  
Vol 11 (2) ◽  
pp. 521-526 ◽  
Author(s):  
Yang-Qin Wang ◽  
Si-Guang Chen ◽  
Xiang-Hai Tang ◽  
Oleg Palchik ◽  
Arie Zaban ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Sonochemical Synthesis ◽  
Dye Sensitized ◽  
Mesoporous Titanium Dioxide ◽  
Sensitized Solar Cells

scholarly journals Quantum dot sensitized electrospun mesoporous titanium dioxide hollow nanofibers for photocatalytic applications

RSC Advances ◽  
2016 ◽  
Vol 6 (53) ◽  
pp. 48109-48119 ◽  
Author(s):  
Narendra Singh ◽  
Kunal Mondal ◽  
Mrinmoy Misra ◽  
Ashutosh Sharma ◽  
Raju Kumar Gupta
Keyword(s):  
Titanium Dioxide ◽  
Quantum Dot ◽  
Dye Degradation ◽  
Coaxial Electrospinning ◽  
Hollow Nanofibers ◽  
Silar Method ◽  
Photocatalytic Dye Degradation ◽  
Cds Qds ◽  
Mesoporous Titanium Dioxide ◽  
Photocatalytic Applications

TiO2 hollow nanofibers prepared by coaxial electrospinning were sensitized with CdS QDs by SILAR method and their photocatalytic dye degradation performance was investigated.

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