ChemInform Abstract: Convenient and Selective Hydrogenation of Nitro Aromatics with a Platinum Nanocatalyst under Ambient Pressure.

Highly-dispersed Pt nanoparticles supported on nitrogen-modified CMK-3 mesoporous carbon (Pt/N-CMK-3) were first fabricated by a two-step impregnation route. The influences of N content on the catalyst porous structure, Pt nanoparticle size, surface properties, and interaction between Pt species and the support were investigated in detail using N2 sorption, X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectra (XPS). The N species acted as anchoring sites for the stabilization of Pt particles. Benefiting from the formation of ultrafine metal nanoparticles, the Pt/N-CMK-3 exhibited excellent catalytic activity and selectivity for the selective hydrogenation of nitro aromatics to the corresponding anilines with hydrogen. The Pt/N-CMK-3 catalyst could be reused eight times and keep its catalytic performance.

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Promotional effect of Fe on the performance of supported Cu catalyst for ambient pressure hydrogenation of furfural

RSC Advances ◽

10.1039/c5ra24742j ◽

2016 ◽

Vol 6 (5) ◽

pp. 3888-3898 ◽

Cited By ~ 38

Author(s):

Marimuthu Manikandan ◽

Ashok Kumar Venugopal ◽

Atul S. Nagpure ◽

Satyanarayana Chilukuri ◽

Thirumalaiswamy Raja

Keyword(s):

Selective Hydrogenation ◽

Furfuryl Alcohol ◽

Bimetallic Catalyst ◽

Ambient Pressure ◽

Catalyst System ◽

Vapour Phase ◽

Impregnation Method ◽

Metal Free ◽

Promotional Effect ◽

Cu Catalyst

A noble-metal free FeCu based bimetallic catalyst system prepared by facile co-impregnation method was found to be a highly admirable for vapour phase selective hydrogenation of furfural to furfuryl alcohol at ambient pressure.

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Environmental microscopy of capillary stress-induced strain behavior in ambient-pressure aerogels

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100166713 ◽

1996 ◽

Vol 54 ◽

pp. 850-851

Author(s):

Sudeep M. Rao ◽

Joshua Samuel ◽

Sai S. Prakash ◽

C. Jeffrey Brinker

Keyword(s):

Silica Aerogel ◽

Ambient Pressure ◽

Drying Shrinkage ◽

Pore Filling ◽

Silica Network ◽

Strain Behavior ◽

Partially Saturated ◽

Capillary Stress ◽

Wetting Liquid ◽

Aerogel Films

Ambient pressure silica aerogel thin films have recently been prepared by exploiting reversible drying shrinkage caused by derivatization of the internal gel surface. Aerogels have porosities of upto 99.9% and due to the small size of the pores (few nanometers), large capillary stresses are produced in gels that are partially saturated with a wetting liquid. As a result of these capillary stresses, the flexible silica network undergoes strain which has been observed using environmental microscopy. This technique allows variation of the equilibrium vapor pressure and temperature, and a simultaneous monitoring of the deformation of the unconstrained film thickness. We have observed >600% deformation during the pore-filling and pore-emptying cycles. In this presentation, we discuss the unique stress-strain behavior of these films.Ref.: Sai S. Prakash, C. Jeffrey Brinker, Alan J. Hurd & Sudeep M. Rao, "Silica aerogel films prepared at ambient pressure by using surface derivatization to induce reversible drying shrinkage", Nature. Vol. 374, 30 March, 1995, 439-443.

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