نتایج جستجو برای: hybrid catalysts

تعداد نتایج: 223194  

2014
Gijo Raj Colas Swalus Eglantine Arendt Pierre Eloy Michel Devillers Eric M Gaigneaux

The hybridization of polyoxometalates (POMs) through an organic-inorganic association offers several processing advantages in the design of heterogeneous catalysts. A clear understanding of the organization of these hybrid materials on solid surfaces is necessary to optimise their properties. Herein, we report for the first time the organization of Keggin phosphotungstic [PW12O40](3-) and Wells...

Journal: :polyolefins journal 0
natalya n. chumachenko boreskov institute of catalysis, siberian branch, russian academy of sciences, prospect akademika lavrentieva 5, novosibirsk 630090 , russian federation vladimir a. zakharov boreskov institute of catalysis, siberian branch, russian academy of sciences, prospect akademika lavrentieva 5, novosibirsk 630090 , russian federation sergey a. sergeev boreskov institute of catalysis, siberian branch, russian academy of sciences, prospect akademika lavrentieva 5, novosibirsk 630090 , russian federation svetlana v. cherepanova boreskov institute of catalysis, siberian branch, russian academy of sciences, prospect akademika lavrentieva 5, novosibirsk 630090 , russian federation

supported catalysts synthesized via the interaction of mg(oet)2 with ticl4 in the presence or absence of an internal stereoregulating donor (di-n-butyl phthalate), with different solvents (chlorobenzene, n-undecane, n-heptane) at different titanation temperatures have been studied by a set of physicochemical methods. data on the chemical composition, x-ray structure and pore structure of these ...

2017
Rupali Mishra Bhushan Patil Ferdi Karadaş Eda Yılmaz

Non–noble metal catalysts have recently emerged as promising alternatives to the expensive platinum catalysts for the oxygen reduction reaction (ORR). In this study, a new domain of materials, copper based coordination polymers, has been investigated as promising catalysts for ORR. The study was inspired by copper incorporating biomolecules, which efficiently catalyse the oxygen reduction react...

2010
L A Silva S Y Ryu J Choi W Choi M R Hoffmann

A hybrid photocatalytic system, which is based on a mixed-phase cadmium sulfide matrix composed of nano-particulate cubic-phase CdS (c-CdS) with average particle diameters of 13 nm and a bandgap energy of 2.6 eV, is coupled with bulk-phase hexagonal CdS (hex-CdS) that has a bandgap energy of 2.3 eV and is interlinked with elemental platinum deposits. The resulting hybrid nano-composite catalyst...

2013
Omar Kammoun Walid Rekik Tahar Mhiri Thierry Bataille Kamran T. Mahmudov Maximilian N. Kopylovich

Graphical Abstract New inorganic–organic hybrid materials effectively and diastereoselectively catalyze the C–C bond formation upon nitroaldol (Henry) reaction. Highlights ► New hybrid materials were easily prepared from zinc(II) salt, sulfuric acid and amines. ► Full structural characterization of the compounds was performed. ► The synthesized compounds act as effective catalysts in the nitroa...

Journal: :Applied Catalysis A-general 2021

Catalytic performances of promoted CoMoS catalysts were greatly improved via a synthesis strategy based on the structuration active phase using self-assembled PANI (Polyaniline) nanowires followed by an addition step cobalt acetylacetonate oxidic or sulfided Mo-based hybrids. Taking into account different promotion levels, slabs lengths determined XPS and TEM, highest rate constants normalized ...

Journal: :Science 2010
Steven Crossley Jimmy Faria Min Shen Daniel E Resasco

A recoverable catalyst that simultaneously stabilizes emulsions would be highly advantageous in streamlining processes such as biomass refining, in which the immiscibility and thermal instability of crude products greatly complicates purification procedures. Here, we report a family of solid catalysts that can stabilize water-oil emulsions and catalyze reactions at the liquid/liquid interface. ...

2011
Ruitao Lv Tongxiang Cui Dang Sheng Su Zhengjun Zhang Seong-Ho Yoon Isao Mochida

A hierarchical N-doped carbon nanotube-graphene hybrid nanostructure (NCNT-GHN), in which the graphene layers are distributed inside the CNT inner cavities, was designed to effi ciently support noble metal (e.g., PtRu) nanoparticles. Well-dispersed PtRu nanoparticles with diameters of 2–4 nm were immobilized onto these NCNT-GHN supports by a low-temperature chemical reduction method without any...

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