Study of the Diffusion Properties of Oxygen in TiO2

Бакулин, А. В.; Чумакова, Л. С.; Kulkova, S. E.

doi:10.1134/s1063776121070025

Cited by 19 publications

(5 citation statements)

References 25 publications

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“…These V o have been shown to act as active sites for plasma CO 2 reduction and also increase the electron density of the adjacent metal cation and promote its interactions with the acidic carbon on CO 2 . [71][72][73][74] The formation energies of V o in Al 2 O 3 , TiO 2 and ZnO have been reported to be 7.0 eV, 5.7 eV, and 4.1 eV respectively. 71 This suggests that the formation of V o would be suppressed on…”

Section: Rsc Applied Interfaces Papermentioning

confidence: 99%

Characterizing catalyst function and transformations in the plasma reduction of CO₂ on atomic layer deposition-synthesized catalysts

Conlin,

Mehrabi,

Parette

et al. 2024

RSC Appl. Interfaces

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Section: Rsc Applied Interfaces Papermentioning

confidence: 99%

Characterizing catalyst function and transformations in the plasma reduction of CO₂ on atomic layer deposition-synthesized catalysts

Conlin,

Mehrabi,

Parette

et al. 2024

RSC Appl. Interfaces

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“…These Vo have been shown to act as active sites for plasma CO2 reduction and also increase the electron density of the adjacent metal cation and promote its interactions with the acidic carbon on CO2. [70][71][72][73] The formation energies of Vo in Al2O3, TiO2 and ZnO have been reported to be 7.0 eV, 5.7 eV, and 4.1 eV respectively. 70 This suggests that the formation of Vo would be suppressed on Al2O3 as compared to TiO2 or ZnO due to the higher energies required.…”

Section: Effect Of Ald Catalyst On Co2 Conversion and Reactor Input P...mentioning

confidence: 99%

Characterizing Catalyst Function and Transformations in the Plasma Reduction of CO 2 on Atomic Layer Deposition-Synthesized Catalysts

Conlin,

Mehrabi,

Parette

et al. 2024

Preprint

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The enhancement of CO2 reduction in atmospheric-pressure, non-thermal plasma has been shown using a variety of catalyst systems with ranging composition, particle sizes, and morphologies. Improvements in CO2 conversion can be attained by choice of catalyst material. However, inhomogeneity in the material distribution arising from the synthesis affects the catalytically active surface area and dielectric environment that modulates the plasma properties near the catalyst. Atomic layer deposition (ALD) can be used to control the composition of ultra- thin layers on support materials. We used ALD to synthesize metal oxide catalyst coatings on high surface area supports. We found that TiO 2 achieved significantly higher yields of CO2 conversion (to CO and O2 ) at low reactor power compared to ZnO or Al2O3 , materials commonly used a support for other catalysts. We also observed an unexpected increase in the catalytic activity on ZnO with increasing power. The results here suggest that ALD can unambiguously isolate the catalytic effects of materials in plasma reactors.

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“…As oxidation goes, the dense oxide layer and the void impede the outward diffusion of titanium atoms. Therefore, oxygen diffusing inwards dominates the growth of the oxide layer, which is also affected by the dense layer causing a slow oxidation rate [18]. For traditional oxidation, it is relatively fast before the oxide layer forms at the beginning, and then thermal oxidation slows down, as atoms need to diffuse through the oxide layer (Figures 4 and 7) [19,20].…”

Section: Oxidation Mechanism Of Titanium With Vanadiummentioning

confidence: 99%

Ceramic Conversion Treatment of Commercial Pure Titanium with a Pre-Deposited Vanadium Layer

Zhang,

Deng,

Dong

2023

Metals

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Titanium is characterized by poor wear resistance which restricts its application. Ceramic conversion treatment (CCT) is used to modify the surface; however, it is a time-consuming process. In this work, a thin vanadium layer was pre-deposited on the commercial pure titanium (CPTi) samples’ surface, and it increased the oxygen absorption significantly and assisted in obtaining a much thicker oxide layer than those samples without a V layer at the treatment temperatures of 620 °C and 660 °C. The oxidation of the samples pre-deposited with the V layer had a much higher oxidation rate, and V was evenly distributed in the oxide layer. After CCT, all samples had a low wear volume and stable coefficient of friction in comparison to the untreated CPTi sample. A slightly higher wear area in the wear track was observed on the V pre-deposited samples than those samples without vanadium, especially those with a thicker oxide layer (>4 µm). This might be associated with defects in a thicker oxide layer and insufficient support from a shallower oxygen diffusion zone or hard debris created at the initial stage. Vanadium in the oxide layer reduced the contact angles of the surface and increased the wettability significantly.

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Study of the Diffusion Properties of Oxygen in TiO2

Cited by 19 publications

References 25 publications

Characterizing catalyst function and transformations in the plasma reduction of CO₂ on atomic layer deposition-synthesized catalysts

Characterizing catalyst function and transformations in the plasma reduction of CO₂ on atomic layer deposition-synthesized catalysts

Characterizing Catalyst Function and Transformations in the Plasma Reduction of CO 2 on Atomic Layer Deposition-Synthesized Catalysts

Ceramic Conversion Treatment of Commercial Pure Titanium with a Pre-Deposited Vanadium Layer

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Study of the Diffusion Properties of Oxygen in TiO2

Cited by 19 publications

References 25 publications

Characterizing catalyst function and transformations in the plasma reduction of CO2 on atomic layer deposition-synthesized catalysts

Characterizing catalyst function and transformations in the plasma reduction of CO2 on atomic layer deposition-synthesized catalysts

Characterizing Catalyst Function and Transformations in the Plasma Reduction of CO 2 on Atomic Layer Deposition-Synthesized Catalysts

Ceramic Conversion Treatment of Commercial Pure Titanium with a Pre-Deposited Vanadium Layer

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Characterizing catalyst function and transformations in the plasma reduction of CO₂ on atomic layer deposition-synthesized catalysts

Characterizing catalyst function and transformations in the plasma reduction of CO₂ on atomic layer deposition-synthesized catalysts