Monomolecular adsorption on rough surfaces with dynamically changing morphology

Resnyanskii, E.D.; Latkin, E.I.; Myshlyavtsev, A. V.; Elokhin, V. I.

doi:10.1016/0009-2614(95)01314-8

Cited by 13 publications

(5 citation statements)

References 14 publications

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“…Recently the model for the monomolecular and dissociative adsorption on the roughened catalytic surface with dynamically changing morphology has been proposed. 15,16 It is based on the well known '' solid-on-solid '' model 17,18 using the '' infinite '' Kossel crystal. As far as we know the modelling of the catalytic reaction performance on the nanosized active particles represented by the '' finite '' Kossel crystals situated on the inactive support surface had been not performed until now.…”

Section: Modelmentioning

confidence: 99%

Novel statistical lattice model for the supported nanoparticle. Features of the reaction performance influenced by the dynamically changed shape and surface morphology of the supported active particle

Kovalyov

Resnyanskii

Elokhin

et al. 2003

Phys. Chem. Chem. Phys.

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Section: Modelmentioning

confidence: 99%

Novel statistical lattice model for the supported nanoparticle. Features of the reaction performance influenced by the dynamically changed shape and surface morphology of the supported active particle

Kovalyov

Resnyanskii

Elokhin

et al. 2003

Phys. Chem. Chem. Phys.

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“…The pore diameters of CX4-BD(OH) 2 and CX4-DPT are 1.36 and 1.59 nm, respectively (Figures S10 and S11), which are in good agreement with the predicted results from simulated crystal structures (1.45 and 1.64 nm). Compared with CX4-BD and CX4-BD(OH) 2 , the decrease of CX4-DPT surface area might be related to the increase of lattice volume and the flatness of morphology, which provided less adsorption sites . TGA curves demonstrated that all COFs possess good thermal stability and no significant thermal decomposition was observed before 400 °C (Figure S12).…”

Section: Resultsmentioning

confidence: 99%

“…Compared with CX4-BD and CX4-BD(OH) 2 , the decrease of CX4-DPT surface area might be related to the increase of lattice volume and the flatness of morphology, which provided less adsorption sites. 26 TGA curves demonstrated that all COFs possess good thermal stability and no significant thermal decomposition was observed before 400 °C (Figure S12). The minor weight loss of CX4-BD at around 200 °C was caused by the elimination of hydrated water and bound solvent molecules.…”

Section: Structural Analysis and Characterization Of Thementioning

confidence: 99%

Calix[4]arene-Decorated Covalent Organic Framework Conjugates for Lithium Isotope Separation

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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Lithium isotope separation has attracted extensive interest due to its important role in fusion and fission reactions. Up to now, it is still a great challenge to separate lithium isotopes (6Li and 7Li) in an efficient manner due to the low capture ability for lithium ions of related materials and highly similar physicochemical properties between lithium isotopes. In this work, three calix[4]arene-decorated crystalline covalent organic frameworks (COFs) with wave-like extension and AA-stacking configuration were designed and utilized for lithium adsorption and its isotope separation. Experimental studies show that these COFs exhibit an outstanding lithium adsorption capacity up to 94.66 mg·g–1, which is about 2 times beyond that of adsorbents reported in the literature. The high adsorption capacity of COFs could be attributed to the abundant adsorption sites from calix[4]arene unit. More importantly, this study demonstrates for the first time that calixarene groups can separate lithium isotopes with an excellent separation factor up to 1.053 ± 0.002, comparable to the most successful solid-phase lithium separation adsorbent. The calculation based on density functional theory showed that calixarene played an important role in the lithium adsorption. Interestingly, the lithium isotope separation performance is mainly affected by the amine bridging units. This work demonstrated that calixarene COFs are promising adsorbents for lithium isotope separation.

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“…In this case the B ads atoms although have the reduced desorption probabilities, but their diffusion probabilities are at least not less than ones for surface metal atoms diffusion. By monomolecular adsorption (with J ma = 2 J mm ) that drastic change of surface particle morphology does not happen (e.g., refs 10,11. and16), although in both cases the adsorbed species will stabilize the point defects and vacancies appearing due to the surface metal atoms diffusion, at that the surface roughening increases.…”

Section: Resultsmentioning

confidence: 99%

“…Recently the model for the monomolecular and dissociative adsorption on the roughened catalytic surface with dynamically changing morphology has been proposed 10, 11. It was based on the well known “solid‐on‐solid” model12, 13 using the «infinite» Kossel crystal.…”

Section: Introductionmentioning

confidence: 99%

Stochastic simulation of physicochemical processes performance over supported metal nanoparticles

2007

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The statistical lattice model has been proposed which permits one to take into account the change in the shape and surface morphology of the nanoparticle under the influence of the reaction media. The influence of monomolecular and dissociative adsorption on the particles equilibrium shape and surface morphology has been studied. It has been shown that by taking into account of attraction "adsorbate-metal" the reshaping of the initial hemispheric particle into cone-shaped one occurs induced by adsorption, similar to the experimentally observed reversible reshaping of active nanoparticles. The model reaction A+B(2) has been studied taking into account the roughening of the active particle surface and the spillover phenomena of the adsorbed A(ads) species over the support surface.

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Monomolecular adsorption on rough surfaces with dynamically changing morphology

Cited by 13 publications

References 14 publications

Novel statistical lattice model for the supported nanoparticle. Features of the reaction performance influenced by the dynamically changed shape and surface morphology of the supported active particle

Novel statistical lattice model for the supported nanoparticle. Features of the reaction performance influenced by the dynamically changed shape and surface morphology of the supported active particle

Calix[4]arene-Decorated Covalent Organic Framework Conjugates for Lithium Isotope Separation

Stochastic simulation of physicochemical processes performance over supported metal nanoparticles

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