A novel photoelectrode from TiO2-WO3 nanoarrays grown on FTO for solar water splitting

Ali, Heba; Ismail, N.; Hegazy, Aiat; Mekewi, Mohamed A.

doi:10.1016/j.electacta.2014.10.142

Cited by 32 publications

(13 citation statements)

References 26 publications

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“…It indicates that biomass derivatives can be more easily oxidized than water, which is a less endergonic process than water oxidation [20][21][22][23]. Hence, biomass derivatives can serve as a promoter in the oxidation reaction of the PEC hydrogen production system, which efficiently promote the electron (e À ) transfer to the Pt electrodes to product hydrogen.…”

Section: Introductionmentioning

confidence: 95%

Photoelectrocatalytic Glucose Oxidation to Promote Hydrogen Production over Periodically Ordered TiO2 Nanotube Arrays Assembled of Pd Quantum Dots

Zhang

Zhao

Shi

et al. 2015

Electrochimica Acta

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Section: Introductionmentioning

confidence: 95%

Photoelectrocatalytic Glucose Oxidation to Promote Hydrogen Production over Periodically Ordered TiO2 Nanotube Arrays Assembled of Pd Quantum Dots

Zhang

Zhao

Shi

et al. 2015

Electrochimica Acta

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“…However, it has a high energy gap 3.0 eV for rutile and 3.2 eV for anatase [12][13][14] and it is excited only by UV light, which is about 4-5 % of the overall solar spectrum. In addition to its high rate of electronhole recombination [15,16].…”

Section: Introductionmentioning

confidence: 99%

Facile one-step process for synthesis of vertically aligned cobalt oxide doped TiO2 nanotube arrays for solar energy conversion

Ali

Ismail

Mekewi

et al. 2015

J Solid State Electrochem

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Vertically aligned cobalt oxide doped TiO 2 nanotube arrays (Co.-oxide TNTAs) were synthesized via one potanodic oxidation of pure titanium substrate in the presence of ammonium fluoride and cobalt salt. After subsequent annealing in air the produced arrays were in the tubular structure and doped with Co.-oxide. The designed TNTAs and Co.-oxide TNTAs were tested as photoanode electrodes in a photoelectrochemical cell. Energy dispersive X-ray (EDX) spectroscopy confirms the incorporation of Co. in the doped TNTAs. The Tauc plots estimated from UV-Vis diffuse reflectance spectra displayed that the insertion of the optimum amount of Co.-oxide leads to a decrease in the band gap of TiO 2 from 3.2 to 2.9 eV. The influences of various cobalt salt concentrations in the electrolyte solution (5, 10, 15, 20 and 25 mM) on the morphology were studied. The evaluation of the photocurrent and photoconversion efficiency was performed for all the fabricated electrodes. Morphological studies illustrated that the addition of cobalt salt with small concentration has no an obvious effect on the ordered tubular structure of TNTAs, whereas, at higher concentrations the tubular structure was partially collapsed. Co.-oxide enhanced the photoconversion efficiency of TNTA electrode by 30 % at optimum concentration under 110 mW/cm 2 solar simulator illumination.

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“…These results prove that, together with passivation of surface traps, this ultrathin ZnO embedded layer can also reduce recombination rate via providing an efficient charge separation at the interface. Despite of its excellent PV characteristics, this coreshell structure has a great potential for photoelectrochemical water splitting due to having low recombination rates, better carrier separation and high collection capability which are prominent factors for hydrogen production rate of water splitting cell [29][30][31][32].…”

Section: Resultsmentioning

confidence: 99%

Enhanced Performance of Nanowire-Based All-TiO2 Solar Cells using Subnanometer-Thick Atomic Layer Deposited ZnO Embedded Layer

Ghobadi

Yavuz

Ghobadi

et al. 2015

Electrochimica Acta

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In this paper, the effect of angstrom-thick atomic layer deposited (ALD) ZnO embedded layer on photovoltaic (PV) performance of Nanowire-Based All-TiO 2 solar cells has been systematically investigated. Our results indicate that by varying the thickness of ZnO layer the efficiency of the solar cell can be significantly changed. It is shown that the efficiency has its maximum for optimal thickness of 1 ALD cycle in which this ultrathin ZnO layer improves device performance through passivation of surface traps without hampering injection efficiency of photogenerated electrons. The mechanisms contributing to this unprecedented change in PV performance of the cell have been scrutinized and discussed.

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A novel photoelectrode from TiO2-WO3 nanoarrays grown on FTO for solar water splitting

Cited by 32 publications

References 26 publications

Photoelectrocatalytic Glucose Oxidation to Promote Hydrogen Production over Periodically Ordered TiO2 Nanotube Arrays Assembled of Pd Quantum Dots

Photoelectrocatalytic Glucose Oxidation to Promote Hydrogen Production over Periodically Ordered TiO2 Nanotube Arrays Assembled of Pd Quantum Dots

Facile one-step process for synthesis of vertically aligned cobalt oxide doped TiO2 nanotube arrays for solar energy conversion

Enhanced Performance of Nanowire-Based All-TiO2 Solar Cells using Subnanometer-Thick Atomic Layer Deposited ZnO Embedded Layer

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