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TPR Study of Core-Shell Fe@Fe<sub>3</sub>O<sub>4</sub>Nanoparticles Supported on Activated Carbon and Carbon Nanotubes

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Advances in Materials Physics and Chemistry 2012年第1期2卷 17-22页

作者： Igor Bychko Yevhen Kalishyn peter strizhak L.V. Pisarzhevsky Institute of Physical Chemistry The National Academy of Sciences of Ukraine Kyiv Ukraine

Core-shell nanoparticles Fe@Fe3O4 supported on activated carbon (AC) and carbon nanotubes (CNTs) have been studied by H2 temperature-programmed reduction (TPR). Nanoparticles with size of 6.5 nm were synthesized by iron(II) oleate thermal decomposition and were supported on activated carbon and carbon nanotubes by colloid deposition method. The nanoparticles Fe@Fe3O4 are characterized by TEM and IR. Reduction of nanoparticles on AC starts at 140?C, whereas reduction of nanoparticles on CNTs starts at 200?C. Moreover, gasification of CNTs with methane releasing starts at 450?C, whereas gasification of AC is negligible at temperatures up to 800?C. All these findings illustrate a strong difference in the interaction between nanoparticles and the support material for AC and CNTs.

关键词： Iron Nanoparticles Carbon Nanotubes Temperature-Programmed Reduction

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纳米级ZnO/MgO固体的合成及其对CO的氧化活性(英文)

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催化学报 2008年第11期29卷 1079-1083页

作者： Olga Z. DIDENKO Gulnara R. KOSMAMBETOVA peter E. strizhak L.V.Pisarzhevsky Institute of Physical Chemistry of the National Academy of Sciences of Ukraine

The ZnO/MgO solid samples containing the ZnO nanoparticles of controllable size were prepared using colloidal technique. The catalytic performance of the ZnO/MgO samples for the CO oxidation was measured. It was revealed that the rate of the CO oxidation reaction on the ZnO nanoparticles with variable average radius (2.01-2.29 nm) shows nonmonotonic dependence caused by the quantum-confinement effect.

关键词：纳米氧化锌氧化镁催化剂氧化活性一氧化碳

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Deposition of Monodisperse Platinum Nanoparticles of Controlled Size on Different Supports

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Advances in Nanoparticles 2013年第1期2卷 32-38页

作者： Zinaida Kaidanovych Yevhen Kalishyn peter strizhak L.V. Pisarzhevsky Institute of Physical Chemistry The National Academy of Sciences of Ukraine Kyiv Ukraine

Monodisperse platinum nanoparticles with controlled size were synthesized by polyol synthesis and supported on γ-Al2O3, SiO2 and carbon nanotubes (CNT) by the colloid deposition method. The average size of Pt nanoparticles in colloidal solutions and on supports were determined by TEM images and from XRD patterns. The size of Pt nanoparticles supported on SiO2 and CNT determined from XRD patterns is in a good agreement with size obtained from the TEM analyses. There were shown that no agglomeration and size changing of Pt nanoparticles on these supports were observed. All these findings illustrate that the method of colloid deposition allows one to obtain catalyst with monodisperse platinum nanoparticles of controlled size deposited on different supports without changing the nanoparticle’s size and morphology.

关键词： Platinum Nanoparticles Pt/γ-Al2O3 Pt/SiO2 Pt/CNT

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Genesis of H-ZSM-11 Acidity under Hydrogen and Water Vapor Treatment

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Journal of Chemistry and Chemical Engineering 2010年第7期4卷 24-28页

作者： peter Eugenovich strizhak Vlasenko Nina Vasilievna Kochkin Yuriy Nickolaevich Kalishyn Yevhen Yurievieh Tel＇biz German Michailovich L. V. Pysarzhevsky Institute of Physical Chemistry National Academy of Sciences of Ukraine Prospect Nauki 31 Kiev 03039 Ukraine

1. Introduction Zeolites are widely used in acid heterogeneous catalysis [1, 2]. Due to the unique physical and chemical properties ofzeolites, they are widely used in commercial catalytic processes, such as fluidized catalytic cracking, hydrocracking, methanol conversion to gasoline or olefins, ethylbenzene production, xylene isomerization, aromatics hydrogenation [3-9]. Acidity, high thermal stability, and shape selectivity determine the use of zeolites as catalysts in reaction processes through acid mechanisms [ 10].

关键词： H-ZSM-11 acidity spectrum QETG method.

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