(Chemical Equation Presented) The probable reaction pathways for propylene epoxidation with O2 and H2 in the presence of trimethylamine on trimethylsilylated Au-Ba(NO3)2/ titanosilicate catalyst are discussed (see figure). The use of trimethylamine as a gas-phase promoter for nanoparticulate gold catalysts leads to a direct one-stage production of propylene oxide (PO) with steady space-time yields comparable to values for current industrial ethylene oxide production. © 2006 Wiley-VCH Verlag GmbH &amp; Co. KGaA.

B CHOWDHURY

J J BRAVO-SUÃ¡REZ

M DATE

S TSUBOTA

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Angewandte Chemie - International Edition

The high surface area three-dimensional porous catalyst has been prepared and characterized by TEM, BET S.A, low angle XRD, 29Si MAS NMR, NH3 TPD techniques. A simple, efficient and rapid method for the green synthesis of α-aminonitriles has been demonstrated over a new mesoporous gallosilicate catalyst Ga-TUD-1. The solventless technique has been applied for the synthesis of a range of compounds with variable functionality with excellent yield and selectivity. The catalyst has been recycled four times with reproducible yield. © 2010 Elsevier B.V. All rights reserved.

Applied Catalysis A: General

Ga-TUD-1: A new heterogeneous mesoporous catalyst for the solventless expeditious synthesis of Î±-aminonitriles

In recent years, there have been great experimental and theoretical advances in the understanding of the epoxidation of propylene by O2 and H2 over Au supported on titanium-containing oxidic supports; however, thus far spectroscopic evidence of reacting species for proposed mechanisms has been lacking. Hydroperoxide species have been postulated as an intermediate responsible for the epoxidation of propylene with O2 and H2. In order to obtain direct evidence for the different type of active oxygen species, in situ UV-vis and EPR measurements were carried out during the epoxidation of propylene with O2 and H2 over a Au/Ti-SiO2 (Ti/Si = 3:100) catalyst. It was determined that the adsorbed species of oxygen (O2-) resided on Au, more likely at a perimeter site, and it led to the formation of titanium hydroperoxo species. These results support the possible mechanism of formation of these hydroperoxo species via H2O2 produced from O2 and H2 adsorbed on the Au surfaces. © 2006 American Chemical Society.

Journal of Physical Chemistry B

In situ UV-vis and EPR study on the formation of hydroperoxide species during direct gas phase propylene epoxidation over Au/Ti-SiO2 catalyst

Angewandte Chemie

10.1002/ange.v122.49

Angewandte Chemie International Edition

Graphical Abstract: Angew. Chem. Int. Ed. 43/2004

Journal of the American Chemical Society

The Nature of the Surface Species Formed on Au/TiO2during the Reaction of H2and O2:  An Inelastic Neutron Scattering Study

Chemistry Letters

Direct Production of Hydrogen Peroxide from H2and O2over Highly Dispersed Au catalysts

The Chemical Record

When Gold Is Not Noble: Catalysis by Nanoparticles

Trimethylamine as a gas-phase promoter: Highly efficient epoxidation of propylene over supported gold catalysts

Journal	Angewandte Chemie - International Edition
Publisher	-
ISSN	1433-7851