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Journal articles on the topic 'Langmuir-Hinshelwood'

Author: Grafiati

Published: 4 June 2021

Last updated: 30 January 2023

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1

Eiswirth, M., J. Bürger, P. Strasser, and G. Ertl. "Oscillating Langmuir−Hinshelwood Mechanisms." Journal of Physical Chemistry 100, no. 49 (January 1996): 19118–23. http://dx.doi.org/10.1021/jp961688y.

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2

Kumar, K. Vasanth, K. Porkodi, and F. Rocha. "Langmuir–Hinshelwood kinetics – A theoretical study." Catalysis Communications 9, no. 1 (January 2008): 82–84. http://dx.doi.org/10.1016/j.catcom.2007.05.019.

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3

Overman, A. R., and R. V. Scholtz. "Langmuir‐hinshelwood model of soil phosphorus kinetics." Communications in Soil Science and Plant Analysis 30, no. 1-2 (January 1999): 109–19. http://dx.doi.org/10.1080/00103629909370188.

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4

Kang, H. C., and W. H. Weinberg. "Structure of a Langmuir-Hinshelwood reaction interface." Physical Review E 48, no. 5 (November 1, 1993): 3464–69. http://dx.doi.org/10.1103/physreve.48.3464.

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5

WANG, Dezheng. "Experimental Conditions for Valid Langmuir-Hinshelwood Kinetics." Chinese Journal of Catalysis 31, no. 8 (August 2010): 972–78. http://dx.doi.org/10.1016/s1872-2067(10)60103-9.

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6

Alvarez-Ramirez, J., R. Femat, M. Meraz, and C. Ibarra-Valdez. "Some remarks on the Langmuir–Hinshelwood kinetics." Journal of Mathematical Chemistry 54, no. 2 (October 15, 2015): 375–92. http://dx.doi.org/10.1007/s10910-015-0566-7.

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7

HO, T. "Collective behavior of many langmuir-hinshelwood reactions." Journal of Catalysis 129, no. 2 (June 1991): 524–29. http://dx.doi.org/10.1016/0021-9517(91)90055-9.

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8

Maganti, Lasya, Madhuri Jash, Anju Nair, and T. P. Radhakrishnan. "Nanoparticle assembly following Langmuir–Hinshelwood kinetics on a Langmuir film and chain networks captured in LB films." Physical Chemistry Chemical Physics 17, no. 11 (2015): 7386–94. http://dx.doi.org/10.1039/c5cp00606f.

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Negatively charged metal nanoparticles assemble as chain networks through Langmuir–Hinshelwood kinetics on a Langmuir film of positively charged amphiphiles. The extension of the networks captured in Langmuir–Blodgett films is tuned by the deposition pressure.

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9

Uskov, Sergey I., Dmitriy I. Potemkin, Leniza V. Enikeeva, Pavel V. Snytnikov, Irek M. Gubaydullin, and Vladimir A. Sobyanin. "Propane Pre-Reforming into Methane-Rich Gas over Ni Catalyst: Experiment and Kinetics Elucidation via Genetic Algorithm." Energies 13, no. 13 (July 2, 2020): 3393. http://dx.doi.org/10.3390/en13133393.

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Pre-reforming of propane was studied over an industrial nickel-chromium catalyst under pressures of 1 and 5 bar, at a low steam to carbon molar ratio of 1, in the temperature range of 220–380 °C and at flow rates of 4000 and 12,000 h−1. It was shown that propane conversion proceeded more efficiently at low pressure (1 atm) and temperatures above 350 °C. A genetic algorithm was applied to search for kinetic parameters better fitting experimental results in such a wide range of experimental conditions. Power law and Langmuir–Hinshelwood kinetics were considered. It was shown that only Langmuir–Hinshelwood type kinetics correctly described the experimental data and could be used to simulate the process of propane pre-reforming and predict propane conversion under the given reaction conditions. The significance of Langmuir–Hinshelwood kinetics increases under high pressure and temperatures below 350 °C.

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10

Borovinskaya, Ekaterina. "Redundancy-Free Models for Mathematical Descriptions of Three-Phase Catalytic Hydrogenation of Cinnamaldehyde." Catalysts 11, no. 2 (February 4, 2021): 207. http://dx.doi.org/10.3390/catal11020207.

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A new approach on how to formulate redundancy-free models for mathematical descriptions of three-phase catalytic hydrogenation of cinnamaldehyde is presented. An automatically created redundant (generalized) model is formulated according to the complete reaction network. Models based on formal kinetics and kinetics concerning the Langmuir-Hinshelwood theory for three-phase catalytic hydrogenation of cinnamaldehyde were investigated. Redundancy-free models were obtained as a result of a step-by-step elimination of model parameters using sensitivity and interval analysis. Starting with 24 parameters in the redundant model, the redundancy-free model based on the Langmuir-Hinshelwood mechanism contains 6 parameters, while the model based on formal kinetics includes only 4 parameters. Due to less degrees of freedom of molecular rotation in the adsorbed state, the probability of a direct conversion of cinnamaldehyde to 3-phenylpropanol according to the redundancy-free model based on Langmuir-Hinshelwood approach is practically negligible compared to the model based on formal kinetics.

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11

Razdan, Neil K., and Aditya Bhan. "Kinetic description of site ensembles on catalytic surfaces." Proceedings of the National Academy of Sciences 118, no. 8 (February 19, 2021): e2019055118. http://dx.doi.org/10.1073/pnas.2019055118.

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We demonstrate that the Langmuir–Hinshelwood formalism is an incomplete kinetic description and, in particular, that the Hinshelwood assumption (i.e., that adsorbates are randomly distributed on the surface) is inappropriate even in catalytic reactions as simple as A + A → A2. The Hinshelwood assumption results in miscounting of site pairs (e.g., A*–A*) and, consequently, in erroneous rates, reaction orders, and identification of rate-determining steps. The clustering and isolation of surface species unnoticed by the Langmuir–Hinshelwood model is rigorously accounted for by derivation of higher-order rate terms containing statistical factors specific to each site ensemble. Ensemble-specific statistical rate terms arise irrespective of and couple with lateral adsorbate interactions, are distinct for each elementary step including surface diffusion events (e.g., A* + * → * + A*), and provide physical insight obscured by the nonanalytical nature of the kinetic Monte Carlo (kMC) method—with which the higher-order formalism quantitatively agrees. The limitations of the Langmuir–Hinshelwood model are attributed to the incorrect assertion that the rate of an elementary step is the same with respect to each site ensemble. In actuality, each elementary step—including adsorbate diffusion—traverses through each ensemble with unique rate, reversibility, and kinetic-relevance to the overall reaction rate. Explicit kinetic description of ensemble-specific paths is key to the improvements of the higher-order formalism; enables quantification of ensemble-specific rate, reversibility, and degree of rate control of surface diffusion; and reveals that a single elementary step can, counter intuitively, be both equilibrated and rate determining.

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12

Kang, H. C., W. H. Weinberg, and M. W. Deem. "Reactant segregation in a Langmuir–Hinshelwood surface reaction." Journal of Chemical Physics 93, no. 9 (November 1990): 6841–50. http://dx.doi.org/10.1063/1.458916.

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13

Fleischmann, Eugene D., and John E. Adams. "Dynamics of a Langmuir-Hinshelwood-type recombination reaction." Surface Science 193, no. 3 (January 1988): 593–615. http://dx.doi.org/10.1016/0039-6028(88)90456-6.

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14

Thompson, W. A., E. Sanchez Fernandez, and M. M. Maroto-Valer. "Probability Langmuir-Hinshelwood based CO2 photoreduction kinetic models." Chemical Engineering Journal 384 (March 2020): 123356. http://dx.doi.org/10.1016/j.cej.2019.123356.

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15

Hellsing, B., and V. P. Zhdanov. "The island model of a Langmuir-Hinshelwood reaction." Chemical Physics Letters 147, no. 6 (June 1988): 613–18. http://dx.doi.org/10.1016/0009-2614(88)80278-1.

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16

Li, Mingxuan, Yao Wang, Jing Cai, Yunrui Li, Yujie Liu, Yin Dong, Shuna Li, Xiaolin Yuan, Xin Zhang, and Xiaoping Dai. "Surface sites assembled-strategy on Pt–Ru nanowires for accelerated methanol oxidation." Dalton Transactions 49, no. 40 (2020): 13999–4008. http://dx.doi.org/10.1039/d0dt02567d.

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17

Mehrvar, Mehrab, William A. Anderson, and Murray Moo-Young. "Photocatalytic degradation of aqueous tetrahydrofuran, 1,4-dioxane, and their mixture with TiO2." International Journal of Photoenergy 2, no. 2 (2000): 67–80. http://dx.doi.org/10.1155/s1110662x00000106.

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Photocatalytic degradation of tetrahydrofuran, 1,4-dioxane, and their mixture in a slurry photoreactor was studied. Using both GC/MS and ion chromatography (IC) methods, possible intermediates were detected and the reaction mechanism pathways for both compounds were proposed. Kinetic models were developed and the kinetic parameters were estimated using a statistical method of non-linear parameter estimation in which all experimental data were utilized. It was shown that tetrahydrofuran was disappeared via direct oxidation as well as hydroxyl radical attack. A modified Langmuir-Hinshelwood described the degradation behavior of tetrahydrofuran and the binary system. 1,4-Dioxane obeyed a simple Langmuir-Hinshelwood kinetic form in the single compound system.

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18

Bekbölet, M., Z. Boyacioglu, and B. özkaraova. "The influence of solution matrix on the photocatalytic removal of color from natural waters." Water Science and Technology 38, no. 6 (September 1, 1998): 155–62. http://dx.doi.org/10.2166/wst.1998.0248.

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Photocatalytic color removal of humic acid was studied in the presence of common inorganic anions; namely, chloride, nitrate, sulfate and phosphate ions at pH 6.8. Color removal rates were explained in terms of pseudo-first order and Langmuir-Hinshelwood kinetics. The Freundlich adsorption data were also evaluated to assess a relationship between the adsorption data and the reaction kinetics. The presence of chloride, nitrate and sulfate ions exhibited different trends when the rate is expressed as pseudo-first order reaction kinetics. In case of Langmuir-Hinshelwood kinetics, the decolorization rates were decreased in the order of the anions as, chloride, nitrate and sulfate. The presence of phosphate ions strongly inhibited the color removal rate.

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19

Wang, W. L., W. Y. Liu, X. L. Weng, Y. Shang, J. J. Chen, Z. G. Chen, and Z. B. Wu. "Organic-free synthesis and ortho-reaction of monodisperse Ni incorporated CeO2 nanocatalysts." Journal of Materials Chemistry A 6, no. 3 (2018): 866–70. http://dx.doi.org/10.1039/c7ta08872h.

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20

Singh, Archana, Veerabhadraiah Palakollu, Aman Pandey, Sriram Kanvah, and Sudhanshu Sharma. "Green synthesis of 1,4-benzodiazepines over La2O3 and La(OH)3 catalysts: possibility of Langmuir–Hinshelwood adsorption." RSC Advances 6, no. 105 (2016): 103455–62. http://dx.doi.org/10.1039/c6ra22719h.

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21

Ertugay, Neşe, and Filiz Nuran Acar. "Ultrasound and UV Stimulated Heterogeneous Catalytic Oxidation of an Azo Dye: A Synergistic Effect." Progress in Reaction Kinetics and Mechanism 42, no. 3 (September 2017): 235–43. http://dx.doi.org/10.3184/146867817x14821527549095.

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This research deals with the decolourisation of direct azo dye, Direct Blue 71 (DB71), in aqueous solution by means of sonocatalytic, photocatalytic and sonophotocatalytic heterogeneous oxidation processes in the presence of a zinc oxide (ZnO) catalyst. The effect of these oxidation processes under visible light and 20 kHz ultrasound was investigated to study their influence on degradation rates by varying the initial dye concentration, pH and catalyst load and to understand the effect of synergy on the degradation process. The synergistic effect is quantified in terms of a synergy factor which has already been defined in the literature. The highest value of the factor was obtained for a low DB71 dye concentration at pH 5.5, 20 °C temperature and 400 mg L−1 optimum ZnO dosage. Pseudo first-order kinetics were followed for the removal of the azo dye according to the Langmuir–Hinshelwood model. For comparison, the Langmuir–Hinshelwood model was also used for experimental values obtained from the sonocatalytic process, the photocatalytic process and the combination of these processes. The Langmuir–Hinshelwood kinetic model demonstrated consistency in all calculations of the initial rates of degradation with the appropriate values for the reaction rate constant and DB71 dye absorption constant.

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22

Koper, M. T. M., A. P. J. Jansen, and J. J. Lukkien. "Lattice–gas modeling of electrochemical Langmuir–Hinshelwood surface reactions." Electrochimica Acta 45, no. 4-5 (November 1999): 645–51. http://dx.doi.org/10.1016/s0013-4686(99)00243-1.

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23

Zgrablich, G., J. L. Sales, R. Uñac, and V. P. Zhdanov. "The island model of desorption and Langmuir-Hinshelwood reactions." Surface Science Letters 290, no. 1-2 (June 1993): A532. http://dx.doi.org/10.1016/0167-2584(93)90922-6.

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24

Zgrablich, G., J. L. Sales, R. Uñac, and V. P. Zhdanov. "The island model of desorption and Langmuir-Hinshelwood reactions." Surface Science 290, no. 1-2 (June 1993): 163–71. http://dx.doi.org/10.1016/0039-6028(93)90598-e.

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25

Belohlav, Zdenek, and Petr Zamostny. "A rate-controlling step in langmuir-hinshelwood kinetic models." Canadian Journal of Chemical Engineering 78, no. 3 (June 2000): 513–21. http://dx.doi.org/10.1002/cjce.5450780310.

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26

Krishna, R., and R. Baur. "On the Langmuir–Hinshelwood formulation for zeolite catalysed reactions." Chemical Engineering Science 60, no. 4 (February 2005): 1155–66. http://dx.doi.org/10.1016/j.ces.2004.09.077.

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27

Tang, Yanan, Zhansheng Lu, Weiguang Chen, Wei Li, and Xianqi Dai. "Geometric stability and reaction activity of Pt clusters adsorbed graphene substrates for catalytic CO oxidation." Physical Chemistry Chemical Physics 17, no. 17 (2015): 11598–608. http://dx.doi.org/10.1039/c5cp00052a.

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28

Wang, Wei, Zixin Wang, Mengqi Sun, Hui Zhang, and Hui Wang. "Ligand-free sub-5 nm platinum nanocatalysts on polydopamine supports: size-controlled synthesis and size-dictated reaction pathway selection." Nanoscale 14, no. 15 (2022): 5743–50. http://dx.doi.org/10.1039/d2nr00805j.

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Catalytic bimolecular transfer hydrogenation reactions undergo a pathway switch between the Langmuir–Hinshelwood and the Eley–Rideal mechanisms as the size of Pt nanocatalysts varies in the sub-5 nm regime.

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29

Atitar, M. Faycal, Asmae Bouziani, Ralf Dillert, Mohamed El Azzouzi, and Detlef W. Bahnemann. "Photocatalytic degradation of the herbicide imazapyr: do the initial degradation rates correlate with the adsorption kinetics and isotherms?" Catalysis Science & Technology 8, no. 4 (2018): 985–95. http://dx.doi.org/10.1039/c7cy01903c.

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The Langmuir–Hinshelwood mechanism applies to the photocatalytic degradation of imazapyr only when assuming the occurence of light-induced changes of the photocatalyst surface affecting the adsorption of the probe molecule.

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30

Gao, Xiaoyan, Yunhong Zhang, and Yong Liu. "A kinetics study of the heterogeneous reaction ofn-butylamine with succinic acid using an ATR-FTIR flow reactor." Physical Chemistry Chemical Physics 20, no. 22 (2018): 15464–72. http://dx.doi.org/10.1039/c8cp01914b.

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Heterogeneous reaction between succinic acid thin film and gas phasen-butylamine was studied, and results show that the reaction follows Langmuir–Hinshelwood mechanism and overall kinetics is dominated by surface reaction.

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31

Rai, Sandhya, Masahiro Ehara, and U. Deva Priyakumar. "Nucleobases tagged to gold nanoclusters cause a mechanistic crossover in the oxidation of CO." Physical Chemistry Chemical Physics 17, no. 37 (2015): 24275–81. http://dx.doi.org/10.1039/c5cp04273a.

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A mechanistic crossover is observed upon using nucleobase tagged gold clusters as catalysts favoring the Eley–Rideal mechanism, over the conventional Langmuir–Hinshelwood pathway followed using pristine gold clusters during CO oxidation.

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32

Krishna, Rajamani, Richard Baur, and Jasper M. van Baten. "Highlighting diffusional coupling effects in zeolite catalyzed reactions by combining the Maxwell–Stefan and Langmuir–Hinshelwood formulations." Reaction Chemistry & Engineering 2, no. 3 (2017): 324–36. http://dx.doi.org/10.1039/c7re00001d.

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The combined phenomena of intra-crystalline adsorption, diffusion and reversible chemical reactions inside microporous crystalline zeolite catalyst particles are described by combining the Langmuir–Hinshelwood kinetics with the Maxwell–Stefan (M–S) diffusion formulation.

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33

Xiang, Jinyao, Xuesen Du, Yuyi Wan, Yanrong Chen, Jingyu Ran, and Li Zhang. "Alkali-driven active site shift of fast SCR with NH3 on V2O5–WO3/TiO2 catalyst via a novel Eley–Rideal mechanism." Catalysis Science & Technology 9, no. 21 (2019): 6085–91. http://dx.doi.org/10.1039/c9cy01565e.

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The heterogeneous SCR reaction obeys the well-known Eley–Rideal mechanism or Langmuir–Hinshelwood mechanism, while fast SCR over alkali-doping catalysts follows the another “E–R” mechanism with adsorbed NO₂.

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34

Zhao, Bo, Jun Han, Linbo Qin, Wangsheng Chen, Zijian Zhou, and Futang Xing. "Impact of individual flue gas components on mercury oxidation over a V2O5–MoO3/TiO2 catalyst." New Journal of Chemistry 42, no. 24 (2018): 20190–96. http://dx.doi.org/10.1039/c8nj05084h.

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35

Uyguner, Ceyda Senem, and Miray Bekbolet. "Contribution of Metal Species to the Heterogeneous Photocatalytic Degradation of Natural Organic Matter." International Journal of Photoenergy 2007 (2007): 1–8. http://dx.doi.org/10.1155/2007/23156.

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The role of organic matters which are high molecular weight macromolecules in natural water supplies and their subsequent removal by advanced oxidation technologies has gained importance because they posses a substantial capacity to complex dissolved metal species. The present study was conducted to evaluate the impact of aqueous Cr(VI) and Mn(II) species on the photocatalytic oxidation of humic acids as a major component of natural organic matter in aquatic systems. The photocatalytic decolorization rate of humic acid was followed by pseudo-first-order and Langmuir Hinshelwood kinetic models. The presence of aqueous Cr(VI) and Mn(II) species did not significantly alter the degradation efficiency (≤20%) in terms of first-order kinetic model. Although the impact of manganese species could be considered as insignificant, a substantial adsorption effect could be assessed as reflected by respective Langmuir-Hinshelwood kinetic model parameters.

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36

Camu, Esteban, Cesar Pazo, Daniel Becerra, Yoan Hidalgo-Rosa, Dayan Paez-Hernandez, Ximena Zarate, Eduardo Schott, and Nestor Escalona. "A new approach to the mechanism for the acetalization of benzaldehyde over MOF catalysts." New Journal of Chemistry 44, no. 35 (2020): 14865–71. http://dx.doi.org/10.1039/d0nj02416c.

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The benzaldehyde acetalization catalyzed by UiO-66 and UiO-66F, was carried out in a batch-type reactor at room temperature and atmospheric pressure, and the full kinetic study was performed using the Langmuir–Hinshelwood and Eley–Rideal models.

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37

Singh, Archana, Veerabhadraiah Palakollu, Aman Pandey, Sriram Kanvah, and Sudhanshu Sharma. "Correction: Green synthesis of 1,4-benzodiazepines over La2O3 and La(OH)3 catalysts: possibility of Langmuir–Hinshelwood adsorption." RSC Advances 8, no. 9 (2018): 4976–78. http://dx.doi.org/10.1039/c8ra90005a.

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Correction for ‘Green synthesis of 1,4-benzodiazepines over La₂O₃ and La(OH)₃ catalysts: possibility of Langmuir–Hinshelwood adsorption’ by Archana Singh et al., RSC Adv., 2016, 6, 103455–103462.

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38

Baxter, R. J., and P. Hu. "Insight into why the Langmuir–Hinshelwood mechanism is generally preferred." Journal of Chemical Physics 116, no. 11 (March 15, 2002): 4379–81. http://dx.doi.org/10.1063/1.1458938.

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39

HU, RAYMOND, VEMURI BALAKOTAIAH, and DAN LUSS. "MULTIPLICITY FEATURES OF POROUS CATALYTIC PELLETS— IV. LANGMUIR-HINSHELWOOD REACTION." Chemical Engineering Communications 55, no. 1-6 (May 1987): 177–98. http://dx.doi.org/10.1080/00986448708911926.

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40

Nieto, F., A. Ramirez Cuesta, A. Velasco, J. L. Riccardo, and G. Zgrablich. "Catalytic activity of a Langmuir-Hinshelwood reaction with surface reconstruction." Journal of Physics: Condensed Matter 5, no. 33A (August 16, 1993): A235—A236. http://dx.doi.org/10.1088/0953-8984/5/33a/077.

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41

Doukeh, Rami, Mihaela Bombos, and Ion Bolocan. "Comparative Study Between two Reaction Kinetic Mechanisms of Thiophene Hydrodesulphurization over CoMo /gama - Al2O3 Supported Catalyst." Revista de Chimie 70, no. 7 (August 15, 2019): 2481–84. http://dx.doi.org/10.37358/rc.19.7.7365.

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The kinetic study of the thiophene hydrodesulphurisation process was carried out for CoMo/gama-Al2O3 catalyst, at temperatures between 175 and 275 �C, pressure ranged from 30bar to 60 bar and the liquid hourly space velocity from 1h-1 to 4 h-1. For the reaction mechanism, the Langmuir-Hinshelwood-Hougen-Watson model (LHHW) was used and two kinetic models were proposed: the first model, that considered that H2 is adsorbed on a different type of active center than thiophene and the second model, that considered that the two reactants are adsorbed on the same type of active sites. The values obtained for the average relative error (ARE) and the correlation coefficient between the experimental and the calculated data (R2) indicate that the Langmuir-Hinshelwood model, describing the adsorption on two active sites, best describes the kinetics of the thiophene hydrodesulfurization reaction over CoMo/gama-Al2O3 tested catalyst.

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42

Zeinalipour-Yazdi, Constantinos D. "Mechanistic aspects of ammonia synthesis on Ta3N5 surfaces in the presence of intrinsic nitrogen vacancies." Physical Chemistry Chemical Physics 23, no. 11 (2021): 6959–63. http://dx.doi.org/10.1039/d1cp00275a.

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Intrinsic nitrogen vacancies can become catalytic centers for the ammonia synthesis reaction on Ta₃N₅via a Langmuir–Hinshelwood mechanism. Dinitrogen is activated in a peculiar side on a sandwich-like configuration between two surface Ta atoms.

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43

Net, S., L. Nieto-Gligorovski, S. Gligorovski, and H. Wortham. "Heterogeneous ozonation kinetics of 4-phenoxyphenol in presence of photosensitizer." Atmospheric Chemistry and Physics Discussions 9, no. 5 (October 15, 2009): 21647–68. http://dx.doi.org/10.5194/acpd-9-21647-2009.

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Abstract. In this work we have quantitatively measured the degradation of 4-phenoxyphenol adsorbed on silica particles following oxidative processing by gas-phase ozone. This was performed under dark conditions and in presence of 4-carboxybenzophenone under simulated sunlight irradiation of the particles surface. At mixing ratio of 60 ppb which corresponds to strongly ozone polluted areas, the first order decay of 4-phenoxyphenol is k1=9.95×10−6 s−1. At very high ozone mixing ratio of 6 ppm the first order rate constants for 4-phenoxyphenol degradation were the following: k1=2.86×10−5 s−1 under dark conditions and k1=5.58×10−5 s−1 in presence of photosensitizer (4-carboxybenzophenone) under light illumination of the particles surface. In both cases the experimental data do follow the modified Langmuir-Hinshelwood equation for surface reactions. Langmuir-Hinshelwood and Langmuir-Rideal mechanisms are also discussed along with the experimental results. Most importantly, the quantities of the oligomers such as 2-(4-Phenoxyphenoxy)-4-phenoxyphenol and 4-[4-(4-Phenoxyphenoxy)phenoxy]phenol formed during the heterogeneous ozonolysis of adsorbed 4-phenoxyphenol were much higher under solar light irradiation of the surface in comparison to the dark conditions.

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44

Kaloti, Mandeep, Anil Kumar, and Naveen K. Navani. "Synthesis of glucose-mediated Ag–γ-Fe2O3 multifunctional nanocomposites in aqueous medium – a kinetic analysis of their catalytic activity for 4-nitrophenol reduction." Green Chemistry 17, no. 10 (2015): 4786–99. http://dx.doi.org/10.1039/c5gc00941c.

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The synthesis of glucose-mediated Ag–γ-Fe₂O₃ nanocomposites in aqueous medium, exhibiting catalytic activity for 4-nitrophenol reduction to 4-aminophenol following the Langmuir–Hinshelwood mechanism at lower [Ag] (μM) (0.3, SPLAg; 6.4, SPHAg), is reported.

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45

Styler, S. A., M. E. Loiseaux, and D. J. Donaldson. "Substrate effects in the photoenhanced ozonation of pyrene." Atmospheric Chemistry and Physics Discussions 10, no. 11 (November 15, 2010): 27825–52. http://dx.doi.org/10.5194/acpd-10-27825-2010.

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Abstract. We report the effects of actinic illumination on the heterogeneous ozonation kinetics of solid pyrene films and pyrene adsorbed at air-octanol and air-aqueous interfaces. Upon illumination, the ozonation of solid pyrene films and pyrene at the air-aqueous interface proceeds more quickly than in darkness; no such enhancement is observed for pyrene at the air-octanol interface. Under dark conditions, the reaction of pyrene at all three interfaces proceeds via a Langmuir-Hinshelwood-type surface mechanism. In the presence of light, Langmuir-Hinshelwood kinetics are observed for solid pyrene films but a linear dependence upon gas-phase ozone concentration is observed at the air-aqueous interface. We interpret these results as evidence of the importance of charge-transfer pathways for the ozonation of excited-state pyrene. The dramatically different behaviour of pyrene at the surface of these three simple reaction environments highlights the difficulties inherent in representing complex reactive surfaces in the laboratory, and suggests caution in extrapolating laboratory results to environmental surfaces.

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46

Montazerozohori, M., S. Nezami, and S. Mojahedi. "Kinetic Study of Photocatalytic Degradation of Tolonium Chloride Under High Pressure Irradiation in Aquatic Buffer Systems." E-Journal of Chemistry 8, s1 (2011): S19—S26. http://dx.doi.org/10.1155/2011/961843.

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Anatase titanium dioxide catalyzed photodegradation of tolonium chloride at various bufferic pH of 2, 7, 9 and 12 in aqueous solution is presented. The effect of some physicochemical parameters such as initial concentration of dye, catalyst amount and reaction time on photocatalytic degradation has been investigated in a photo-reactor cell containing high pressure mercury lamp to obtain the optimum conditions in each bufferic pH at constant temperature. A complete spectrophotometric kinetic study of tolonium chloride under high pressure irradiation at buffer media was performed. The photocatalytic degradation observed rate constants (kobs) were found to be 2.90×10-3, 3.30×10-3, 3.20×10-3and 5.20×10-3min-1for buffer pH of 2-12 respectively. It was found that a pseudo-first-order kinetic model based on Langmuir-Hinshelwood one is usable to photodegradation of this compound at all considered buffer pH. In addition to these, the Langmuir-Hinshelwood rate constants, krfor the titled compound at various pH are reported.

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47

Styler, S. A., M. E. Loiseaux, and D. J. Donaldson. "Substrate effects in the photoenhanced ozonation of pyrene." Atmospheric Chemistry and Physics 11, no. 3 (February 14, 2011): 1243–53. http://dx.doi.org/10.5194/acp-11-1243-2011.

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Abstract. We report the effects of actinic illumination on the heterogeneous ozonation kinetics of solid pyrene films and pyrene adsorbed at air-octanol and air-aqueous interfaces. Upon illumination, the ozonation of solid pyrene films and pyrene at the air-aqueous interface proceeds more quickly than in darkness; no such enhancement is observed for pyrene at the air-octanol interface. Under dark conditions, the reaction of pyrene at all three interfaces proceeds via a Langmuir-Hinshelwood-type surface mechanism. In the presence of light, Langmuir-Hinshelwood kinetics are observed for solid pyrene films but a linear dependence upon gas-phase ozone concentration is observed at the air-aqueous interface. We interpret these results as evidence of the importance of charge-transfer pathways for the ozonation of excited-state pyrene. The dramatically different behaviour of pyrene at the surface of these three simple reaction environments highlights the difficulties inherent in representing complex reactive surfaces in the laboratory, and suggests caution in extrapolating laboratory results to environmental surfaces.

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48

Net, S., L. Nieto-Gligorovski, S. Gligorovski, and H. Wortham. "Heterogeneous ozonation kinetics of 4-phenoxyphenol in the presence of photosensitizer." Atmospheric Chemistry and Physics 10, no. 4 (February 15, 2010): 1545–54. http://dx.doi.org/10.5194/acp-10-1545-2010.

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Abstract. In this work we have quantitatively measured the degradation of 4-phenoxyphenol adsorbed on silica particles following oxidative processing by gas-phase ozone. This was performed under dark conditions and in the presence of 4-carboxybenzophenone under simulated sunlight irradiation of the particles surface. At the mixing ratio of 60 ppb which corresponds to strongly polluted ozone areas, the first order of decay of 4-phenoxyphenol is k1=9.95×10−6 s−1. At a very high ozone mixing ratio of 6 ppm the first order rate constants for 4-phenoxyphenol degradation were the following: k1=2.86×10−5 s−1 under dark conditions and k1=5.58×10−5 s−1 in the presence of photosensitizer (4-carboxybenzophenone) under light illumination of the particles surface. In both cases, the experimental data follow the modified Langmuir-Hinshelwood equation for surface reactions. The Langmuir-Hinshelwood and Langmuir-Rideal mechanisms for bimolecular surface reactions are also discussed along with the experimental results. Most importantly, the quantities of the oligomers such as 2-(4-Phenoxyphenoxy)-4-phenoxyphenol and 4-[4-(4-Phenoxyphenoxy)phenoxy]phenol formed during the heterogeneous ozonolysis of adsorbed 4-phenoxyphenol were much higher under solar light irradiation of the surface in comparison to the dark conditions.

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KALTHOD, DILIP G., and SOL W. WELLER. "A METHOD OF OBTAINING LANGMUIR-HINSHELWOOD PARAMETERS FROM PULSED MICROCATALYTIC REACTORS." Chemical Engineering Communications 39, no. 1-6 (December 1985): 323–35. http://dx.doi.org/10.1080/00986448508911680.

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Fernández, J. R., P. Kalita, S. Migórski, M. C. Muñiz, and C. Núñez. "Variational analysis of the Langmuir–Hinshelwood dynamic mixed-kinetic adsorption model." Nonlinear Analysis: Real World Applications 15 (January 2014): 205–20. http://dx.doi.org/10.1016/j.nonrwa.2013.07.005.

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