Photocatalytic hydrogen evolution over monolayer H1.07Ti1.73O4·H2O nanosheets: Roles of metal defects and greatly enhanced performances

Song, Yujie; Wang, Hao; Xiong, Jinhua; Guo, Binbin; Liang, Shijing; Wu, Ling

doi:10.1016/j.apcatb.2017.09.009

Cited by 57 publications

(29 citation statements)

References 47 publications

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“…The TEM and HRTEM images in Figure 1C,D show that the inter-planar spacing of 0.37 and 0.32 nm, corresponding to the (110) and (130) crystal planes of HTO, respectively. 57 Then, by mixing the positively charged KLTO with the naturally negatively charged GO, KLTO is wrapped with GO (KLTO@GO) by the electrostatic assembly process. At the same time, the solution was adjusted to PH value of 5 with HCl, KLTO@GO was transformed to H 1.07 Ti 1.73 O 4 @GO by reacting with acid during the stirring process.…”

Section: Resultsmentioning

confidence: 99%

Investigation the sodium storage kinetics of H_1.07Ti_1.73O₄@rGO composites for high rate and long cycle performance

Hou

Liu

et al. 2020

J. Am. Ceram. Soc.

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Insertion type material has been attracted plenty of attentions as the anode of sodium ion batteries (SIBs) due to the low volume change induced long cycle stability. H 1.07 Ti 1.73 O 4 (HTO), a two-dimensional layered material, is a new insertion type anode material for SIBs reported in this study. Layered HTO composites were decorated with rGO nanosheets via an electrostatic assembly method followed by hydrothermal treatment. When adapted as the anode material of SIBs, HTO@rGO composite exhibits an enhanced sodium ion storage behavior, including high rate capability and long cycle stability. It can deliver high capacities of 142.8 and 66.7 mA h g −1 at 100 and 10 000 mA g −1 , respectively. Moreover, it can keep a capacity of 75.1 mA h g −1 at 5 A g −1 after even 5000 cycles, corresponding to a high capacity retention of 70.8% (0.0058% capacity decay per cycle). HTO exhibits a small volume expansion of 19.6% by in-situ transmission electron microscopy (in-situ TEM). The diffusion coefficient of sodium ions is increased from 1.77 × 10 −14 cm 2 s −1 in HTO composites to 4.80 × 10 −14 cm 2 s −1 in HTO@rGO composites. Our designed and synthesized HTO@rGO provides a new route for high rate and long cycle stable SIBs anode materials.

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Section: Resultsmentioning

confidence: 99%

Investigation the sodium storage kinetics of H_1.07Ti_1.73O₄@rGO composites for high rate and long cycle performance

Hou

Liu

et al. 2020

J. Am. Ceram. Soc.

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“…For the deconvolution of Pd 3d and Ti 2p high resolution spectra, we considered Pd 2+ , Pd n+ (0<n<2), Pd 0 , Ti 3+ and Ti 4+ species assigned to different binding energies according to the data reported in the literature . In Pd 3d 5/2 , the content of Pd 2+ and Pd n+ is obviously converted to Pd 0 when Pd 3 Cl nanocluster is supported on TNT.…”

Section: Resultsmentioning

confidence: 99%

Boosting the Activity of Ligand‐on Atomically Precise Pd₃Cl Cluster Catalyst by Metal‐Support Interaction from Kinetic and Thermodynamic Aspects

Yun

Sheng

et al. 2018

Adv Synth Catal

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Atomically precise nanoclusters (APNCs), as ideal model catalysts, revealed great advantages to deep-understand of reaction mechanisms in heterogeneous catalysis. Boosting the activity of APNCs is the most critical issue under the premise of maintaining structure invariance. Herein, utilizing Metal-Support Interaction (MSI) strategy, we prepared an excellent and recyclable catalyst for aerobic oxidation by combination of an otherwise inert nanocluster [Pd 3 Cl(PPh 2 ) 2 (PPh 3 ) 3 ] + [SbF 6 ] À (denoted as Pd 3 Cl) with functional titanate nanotubes (TNT). The promising Pd 3 Cl/TNT composite gives rise to excellent conversion with 100% selectivity without any additives at 30 8C under an oxygen pressure. This result is unprecedented in ligand-on nanocluster catalysts without high temperature calcination. The distinct difference between their activities of Pd 3 Cl/TNT composite and fresh Pd 3 Cl nanocluster is explained by the presence of the MSI effect, as confirmed using X-ray photoelectron spectroscopy (XPS) analysis. Theoretical simulations are further carried out to elucidate the catalytic mechanism, indicating the MSI effect promotes the crucial b-H elimination step in both kinetic and thermodynamic aspects. This work presents the example of atomic-level understanding of the effect of MSI on facilitating the APNCs catalytic properties.

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“…The thinnest nanosheets contain just a single layer of Ti and O atoms. However, such monolayer nanosheets are not stable, at least for (010) and (101) surfaces [30]. Their structure becomes strongly distorted, and they are converted into the same lepidocrocite structure.…”

Section: The Surface Structure Of Two-dimensional (2d) Tiomentioning

confidence: 99%

Recent Advancements in the Understanding of the Surface Chemistry in TiO2 Photocatalysis

et al. 2020

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Surface chemistry plays a major role in photocatalytic and photoelectrochemical processes taking place with the participation of TiO2. The synthesis methods, surface characterizations, theoretical research methods, and hardware over the last decade generated opportunities for progress in the surface science of this photocatalyst. Very recently, attention was paid to the design of photocatalysts at the nanoscale level by adjusting the types of exposed surfaces and their ratio, the composition and the surface structure of nanoparticles, and that of individual surfaces. The current theoretical methods provide highly detailed designs that can be embodied experimentally. The present review article describes the progress in the surface science of TiO2 and TiO2-based photocatalysts obtained over the last three years. Such aspects including the properties of macro- and nano-scale surfaces, noble-metal-loaded surfaces, doping with Mg and S, intrinsic defects (oxygen vacancies), adsorption, and photoreactions are considered. The main focus of the article is on the anatase phase of TiO2.

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Photocatalytic hydrogen evolution over monolayer H1.07Ti1.73O4·H2O nanosheets: Roles of metal defects and greatly enhanced performances

Cited by 57 publications

References 47 publications

Investigation the sodium storage kinetics of H_1.07Ti_1.73O₄@rGO composites for high rate and long cycle performance

Investigation the sodium storage kinetics of H_1.07Ti_1.73O₄@rGO composites for high rate and long cycle performance

Boosting the Activity of Ligand‐on Atomically Precise Pd₃Cl Cluster Catalyst by Metal‐Support Interaction from Kinetic and Thermodynamic Aspects

Recent Advancements in the Understanding of the Surface Chemistry in TiO2 Photocatalysis

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Photocatalytic hydrogen evolution over monolayer H1.07Ti1.73O4·H2O nanosheets: Roles of metal defects and greatly enhanced performances

Cited by 57 publications

References 47 publications

Investigation the sodium storage kinetics of H1.07Ti1.73O4@rGO composites for high rate and long cycle performance

Investigation the sodium storage kinetics of H1.07Ti1.73O4@rGO composites for high rate and long cycle performance

Boosting the Activity of Ligand‐on Atomically Precise Pd3Cl Cluster Catalyst by Metal‐Support Interaction from Kinetic and Thermodynamic Aspects

Recent Advancements in the Understanding of the Surface Chemistry in TiO2 Photocatalysis

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Investigation the sodium storage kinetics of H_1.07Ti_1.73O₄@rGO composites for high rate and long cycle performance

Investigation the sodium storage kinetics of H_1.07Ti_1.73O₄@rGO composites for high rate and long cycle performance

Boosting the Activity of Ligand‐on Atomically Precise Pd₃Cl Cluster Catalyst by Metal‐Support Interaction from Kinetic and Thermodynamic Aspects