نتایج جستجو برای: bimetallic catalyst composition

تعداد نتایج: 305337  

Journal: :Catalysis Science & Technology 2021

The synergistic effect Ni–Cu in the bimetallic catalyst Ni–Cu/C improved stability and reduction temperature as well enhanced catalytic activity for decarboxylation of palmitic acid.

Journal: :Chemical & pharmaceutical bulletin 2000
M Shibasaki M Kanai

Two types of general and practical enantioselective catalysts, namely, bimetallic complexes and Lewis acid-Lewis base bifunctional catalysts were developed based on the concept of multifunctional catalysis. In the first part of this review, the first example of a catalytic enatioselective nitro-Mannich reaction as well as a direct catalytic enantioselective aldol reaction of 2-hydroxyacetopheno...

Journal: :Philosophical transactions. Series A, Mathematical, physical, and engineering sciences 2018
Zainab Khan Nicholas F Dummer Jennifer K Edwards

A series of bimetallic silver-palladium catalysts supported on titania were prepared by wet impregnation and assessed for the direct synthesis of hydrogen peroxide, and its subsequent side reactions. The addition of silver to a palladium catalyst was found to significantly decrease hydrogen peroxide productivity and hydrogenation, but crucially increase the rate of decomposition. The decomposit...

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...

Journal: :Nanoscale 2012
Sven Heiles Andrew J Logsdail Rolf Schäfer Roy L Johnston

A genetic algorithm (GA) coupled with density functional theory (DFT) calculations is used to perform global optimisations for all compositions of 8-atom Au-Ag bimetallic clusters. The performance of this novel GA-DFT approach for bimetallic nanoparticles is tested for structures reported in the literature. New global minimum structures for various compositions are predicted and the 2D-3D trans...

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: :Langmuir : the ACS journal of surfaces and colloids 2010
P R Sajanlal T Pradeep

A strategy for the preparation of bimetallic mesoflowers (MFs) has been demonstrated by a simple overgrowth reaction. We make hybrid MFs containing Au core and shells of different metals, such as Ag and Pt, by tuning the experimental conditions so as to study region-specific overgrowth. This selective growth is attributed to the specific binding affinity of cetyltrimethylammonium bromide (CTAB)...

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