Inelastic Neutron Scattering Investigation of the Nature of Surface Sites Occupied by Hydrogen on Highly Dispersed Platinum on Commercial Carbon Black Supports

2000 ◽  
Vol 196 (1) ◽  
pp. 174-179 ◽  
Author(s):  
Peter Albers ◽  
Emmanuel Auer ◽  
Karsten Ruth ◽  
Stewart F. Parker
Keyword(s):  
Carbon Black ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Surface Sites ◽  
Highly Dispersed ◽  
Commercial Carbon

Looking for the active hydrogen species in a 5 wt% Pt/C catalyst: a challenge for inelastic neutron scattering

2018 ◽  
Vol 208 ◽  
pp. 227-242 ◽  
Author(s):  
M. Carosso ◽  
A. Lazzarini ◽  
A. Piovano ◽  
R. Pellegrini ◽  
S. Morandi ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Active Hydrogen ◽  
Industrial Catalyst ◽  
Mean Diameter ◽  
Highly Dispersed ◽  
Hydrogenation Reactions

We looked at the active hydrogen species in a highly dispersed and very homogeneous 5 wt% Pt/C industrial catalyst (Pt particle mean diameter of 2.0 ± 0.5 nm) for hydrogenation reactions, by coupling H2 adsorption measurements with Inelastic Neutron Scattering (INS).

Analysis of Carbon Black-Filled Polymers by Vibrational Spectroscopy

1994 ◽  
Vol 48 (6) ◽  
pp. 669-673 ◽  
Author(s):  
Stewart F. Parker ◽  
Kenneth P. J. Williams ◽  
Peter Meehan ◽  
Mark A. Adams ◽  
John Tomkinson
Keyword(s):  
Raman Spectroscopy ◽  
Infrared Spectroscopy ◽  
Carbon Black ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Filled Polymers ◽  
Major Disadvantage ◽  
Diamond Anvil ◽  
Suitable Reference

Carbon black-filled polymers are among the most challenging samples that an analyst may be called upon to identify. In this paper three novel methods of obtaining vibrational spectra from four different carbon black-filled polymers are evaluated: transmission infrared spectroscopy using a diamond anvil cell, Raman spectroscopy using 780-nm excitation, and inelastic neutron scattering. Overall, none of the three methods used in this work was totally satisfactory, but for most purposes infrared spectroscopy provides the best results in terms of spectrometer accessibility and the availability of suitable reference collections. Raman spectroscopy was successful only with one of the four polymers. Inelastic neutron scattering (INS) was successful in obtaining a spectrum with all four materials, but this success occurred only with respect to the hydrogenic part of the polymer, and, for many materials, it is the heteroelements, O, S, and halogens, that determine the important physical properties of the compound. For both Raman spectroscopy and INS, a major disadvantage is the lack of a suitable data base for identification of the materials.

Inelastic Neutron Scattering from Filled Elastomers

2000 ◽  
Vol 73 (5) ◽  
pp. 847-863 ◽  
Author(s):  
A. I. Nakatani ◽  
R. Ivkov ◽  
P. Papanek ◽  
H. Yang ◽  
M. Gerspacher
Keyword(s):  
Carbon Black ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Time Of Flight ◽  
Soxhlet Extraction ◽  
Inelastic Neutron ◽  
Hydrogen Atoms ◽  
Bound Rubber ◽  
Neutron Filter ◽  
Time Of Flight Spectroscopy

Abstract Inelastic neutron scattering experiments are powerful techniques for evaluating local molecular dynamics. These methods are especially sensitive to hydrogen atoms containing motions. An overview of these experimental techniques is presented. Neutron filter analyzer and time-of-flight spectroscopy methods are used to characterize the local dynamics of polymers in the presence and absence of fillers. Of particular interest is the comparison between bound rubber attached to the filler surface and the pure, unbound rubber. A commercial synthetic polyisoprene containing approximately 100% cis-1,4 isomers was compounded with three different carbon blacks: N299, G299 (graphitized N299), and N762. Soxhlet extraction on each of the samples was performed so that corresponding samples containing purely bound rubber with filler were obtained. The filter analyzer and time-of flight spectra show distinct differences between the bound and pure rubber as well as differences based on carbon black type. Correlation of the spectral differences to the type of carbon black and initial concentration of carbon black are discussed.

Anomalous vibrational modes in acetanilide as studied by inelastic neutron scattering

1992 ◽  
Vol 2 (10) ◽  
pp. 1929-1939 ◽  
Author(s):  
Mariette Barthes ◽  
Juegen Eckert ◽  
Susanna W. Johnson ◽  
Jacques Moret ◽  
Basil I. Swanson ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Vibrational Modes

Inelastic neutron scattering study of icosahedral AlFeCu quasicrystal

1992 ◽  
Vol 2 (2) ◽  
pp. 125-130 ◽  
Author(s):  
M. Quilichini ◽  
B. Hennion ◽  
G. Heger ◽  
S. Lefebvre ◽  
A. Quivy
Keyword(s):  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Scattering Study ◽  
Neutron Scattering Study

INELASTIC NEUTRON SCATTERING ON THE SPIN GLASS : PdMn 10 - at. %

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-918-C6-919 ◽  
Author(s):  
B. H. Verbeek ◽  
C. Van Dijk ◽  
C. J. Nieuwenhuys ◽  
J. A. Mydosh
Keyword(s):  
Neutron Scattering ◽  
Spin Glass ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron
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