نتایج جستجو برای: bimetallic catalyst

تعداد نتایج: 47373  

2016
Laurent Piccolo Z. Y. Li Ilker Demiroglu Florian Moyon Zere Konuspayeva Gilles Berhault Pavel Afanasiev Williams Lefebvre Jun Yuan Roy L. Johnston

Heterogeneous catalysis, which is widely used in the chemical industry, makes a great use of supported late-transition-metal nanoparticles, and bimetallic catalysts often show superior catalytic performances as compared to their single metal counterparts. In order to optimize catalyst efficiency and discover new active combinations, an atomic-level understanding and control of the catalyst stru...

Journal: :Dalton transactions 2007
Xiao-Hui Wang Ming-Hui Zhang Wei Li Ke-Yi Tao

A simple, one-step thermal decomposition method for the preparation of Co(3)Mo(3)C is reported in this paper. In this novel synthesis route, a mixed-salt precursor, containing Co(CH(3)COO)(2) x 4H(2)O, (HMT)(2)(NH(4))(4)Mo(7)O(24) x 2H(2)O (HMT = hexamethylenetetramine), and excess HMT is directly decomposed to the bimetallic carbide under flowing argon at 1023 K. The role of HMT in the prepara...

Journal: :Chemistry 2015
Javier Martínez José A Castro-Osma Amy Earlam Carlos Alonso-Moreno Antonio Otero Agustín Lara-Sánchez Michael North Antonio Rodríguez-Diéguez

New aluminium scorpionate based complexes have been prepared and used for the synthesis of cyclic carbonates from epoxides and carbon dioxide. Bimetallic aluminium(heteroscorpionate) complexes 9-14 were synthesised in very high yields. The single-crystal X-ray structures of 12 and 13 confirm an asymmetric κ(2)-NO-μ-O arrangement in a dinuclear molecular disposition. These bimetallic aluminium c...

2004
KRISHNAN BALAKRISHNAN JOHANNES SCHWANK

The reaction of 2,2-dimethylpropane (neopentane) with hydrogen was studied over two series of supported bimetallic catalysts containing platinum as the primary group VIII metal and either gold or tin as the second metallic component. In both catalyst series the platinum nominal loading was maintained constant at 1 wt%. The loading of the second metal component was varied. An effort has been mad...

Journal: :international journal of nanoscience and nanotechnology(ijnn 0
z. s. arabshahi department of solid state physics, faculty of basic science, university of mazandaran, p. o. box 47416-95447, babolsar, iran m. akbarzadeh pasha 1department of solid state physics, faculty of basic science, university of mazandaran, p. o. box 47416-95447, babolsar, iran f. shahi department of solid state physics, faculty of basic science, university of mazandaran, p. o. box 47416-95447, babolsar, iran

in this research carbon nanotubes were produced by chemical vapor deposition of acetylene over a mixture of iron and cobalt catalysts supported on nanometric tio2 and the influences of two synthesis parameters: growth temperature and catalyst composition ratio on properties of end-product carbon nanotubes were investigated. the catalytic basis was prepared by wet impregnation method with differ...

Journal: :Nano letters 2013
Lin Gan Marc Heggen Rachel O'Malley Brian Theobald Peter Strasser

Nanoporosity is a frequently reported phenomenon in bimetallic particle ensembles used as electrocatalysts for the oxygen reduction reaction (ORR) in fuel cells. It is generally considered a favorable characteristic, because it increases the catalytically active surface area. However, the effect of nanoporosity on the intrinsic activity and stability of a nanoparticle electrocatalyst has remain...

Series of Copper Ruthenium (Cu-Ru) bimetallic catalysts supported on γ-Al2O3 with different metal loading are prepared and investigated for catalytic wet air oxidation of ammonia to nitrogen. The ammonia decomposition activity was studied at three different temperatures i.e. 150oC, 200oC, and 230 oC and it is found that catalytic activity increases with the increase in temperature along with th...

Journal: :Sustainable Energy and Fuels 2023

A low-cost bimetallic bifunctional 5-5 wt% FeNi/H-Beta-300 catalyst was investigated in solventless hydrodeoxygenation of lignin-derived model compounds isoeugenol or dihydroeugenol the batch and continuous mode. The characterized...

Journal: :Green Chemistry 2022

High 1,4-NADH selectivity (90% at full conversion) has been achieved in H 2 -driven NAD + reduction using a PtSn/SiO bimetallic catalyst, offering strategy for the development of heterogeneous catalysts NADH regeneration.

2013
Michael North James M Watson

Structurally well-defined bimetallic titanium(IV) (salen) and monometallic vanadium(V) (salen) complexes have been used as catalysts for the asymmetric addition of trimethylsilyl cyanide to β-nitroalkenes to produce chiral nitronitriles with ee values in the range of 79-89 % and conversions up to 100 % at 0 °C. The reaction conditions (solvent, temperature, time and vanadium complex counter-ion...

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