نتایج جستجو برای: co momgo catalyst

تعداد نتایج: 371725  

Journal: :nanochemistry research 2016
massomeh ghorbanloo amene mohamadi heidenori yahiro

bis-(l-tyrosinato)copper(ii) was reacted with 3-(chloropropyl)-trimethoxysilane functionalized silica that has infused magnetite to yield a magnetically separable catalyst in which the copper carboxylate is covalently linked to the silica matrix through the silane linkage. the immobilized catalyst has been characterized by spectroscopic studies (such as ft-ir, epr, magnetic measurement, sem) an...

Journal: :Journal of the American Chemical Society 2009
Yogesh Surendranath Mircea Dinca Daniel G Nocera

Electrolysis of Co(2+) in phosphate, methylphosphonate, and borate electrolytes effects the electrodeposition of an amorphous highly active water oxidation catalyst as a thin film on an inert anode. Electrodeposition of a catalytically competent species immediately follows oxidation of Co(2+) to Co(3+) in solution. Methylphosphonate and borate electrolytes support catalyst activity comparable t...

2013
Chengming Zhang Lequan Liu Xinjiang Cui Lirong Zheng Youquan Deng Feng Shi

The controllable preparation of nano-gold catalyst maintains a challenge. Except the parameters have been revealed before, here we'd like to show that controllable preparation of active nano-gold catalyst can be achieved using chlorine as an indicator. By tracing the chlorine concentration in the washing step, a series of Au/Fe2O3 catalysts were prepared with co-precipitation method. The applyi...

Journal: :iranian journal of chemical engineering 0
behrang izadkhah department of applied chemistry and chemical engineering, university of tabriz, tabriz, iran. aligholi niaei department of applied chemistry and chemical engineering, university of tabriz, tabriz, iran. ali tarjomannejad department of applied chemistry and chemical engineering, university of tabriz, tabriz, iran. daryush salari department of applied chemistry and chemical engineering, university of tabriz, tabriz, iran.

in this paper, labo3 perovskite type catalyst formulations were prepared by sol-gel auto combustion method using citric acid as the fuel. activity of catalysts was tested in catalytic oxidation of toluene as a model of volatile organic compounds. lacoo3 perovskite formulation showed the highest activity among labo3 (fe, mn and co) perovskite catalysts. so, lacoo3 perovskite based catalyst was s...

2017
Xuelian Liang Xinping Shi Fanfan Zhang Yuyang Li Hongbin Zhang Youzhu Yuan

H2 production by catalytically ethanol steam reforming (ESR) is an effective and prospective method for the application of fuel cells. However, the catalysts’ desirable activity and stability remains an unprecedented challenge. Herein, a type of Sc2O3-doped Co-ZnO catalyst was developed by a co-precipitation method. The so-constructed Co2Zn1Sc0.3 catalyst exhibited a superb catalytic performanc...

2003
Enrique Iglesia

Catalyst productivity and selectivity to C5+ hydrocarbons are critical design criteria in the choice of Fischer-Tropsch synthesis (FTS) catalysts and reactors. Cobalt-based catalysts appear to provide the best compromise between performance and cost for the synthesis of hydrocarbons from CO/H2 mixtures. Optimum catalysts with high cobalt concentration and site density can be prepared by control...

Journal: :Journal of nanoscience and nanotechnology 2006
Perla B Balbuena Jin Zhao Shiping Huang Yixuan Wang Nataphan Sakulchaicharoen Daniel E Resasco

Classical molecular dynamics simulations are carried out to analyze the physical state of the catalyst, and the growth of single-wall carbon nanotubes under typical temperature and pressure conditions of their experimental synthesis, emphasizing the role of the catalyst/substrate interactions. It is found that a strong cluster/substrate interaction increases the cluster melting point, modifying...

2004
Masamichi Kohno Takaaki Orii Makoto Hirasawa Takafumi Seto Yoichi Murakami Shohei Chiashi Yuhei Miyauchi Shigeo Maruyama

Single-walled carbon nanotubes (SWNTs) were synthesized using size-controlled catalyst nanoparticles created by the pulsed laser ablation method. Specifically, the alloy particles (Co/Mo or Co/Pt) were prepared by ablation of the target alloy materials in an inert gas atmosphere. Size selection was performed using a differential mobility analyzer (DMA). The obtained nanoparticles were deposited...

Journal: :Dalton transactions 2016
Wei Yang Lim Minghui Hong Ghim Wei Ho

The effective immobilization of a transition chalcogenide co-catalyst via an in situ aqueous photo-assisted deposition technique has shown great accessibility to complex ZnIn2S4 host hierarchical nanostructured materials with homogeneous distribution. The complementary photo-assisted deposition readily deposits finely-dispersed co-catalyst particles and simultaneously generates photocatalytic h...

Journal: :physical chemistry research 0
paria nikparsa department of chemistry ali akbar mirzaei department of chemistry vahide keikhah department of computer science hossein jistan department of computer science

an alumina supported co/ni catalyst was prepared by sol-gel procedure to study the catalytic behavior during fischer-tropsch synthesis in a fixed-bed reactor. the effect of co conversion (10-50%) on hydrocarbon product distribution (ch4, c5+ and c2-c4 olefin selectivities) was studied. selectivity for ch4 decreased, while those of c5+ and olefin selectivities increased with increasing co conver...

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