Characterization of Ammonia Adsorption on Ruthenium Sulfide: Identification of Amino Species by Inelastic Neutron-Scattering

1995 ◽  
Vol 157 (2) ◽  
pp. 414-422 ◽  
Author(s):  
H. Jobic ◽  
M. Lacroix ◽  
T. Decamp ◽  
M. Breysse
1995 ◽  
Vol 213-214 ◽  
pp. 281-283 ◽  
Author(s):  
O. Fujita ◽  
M. Nishi ◽  
J. Akimitsu ◽  
H. Okumura ◽  
K. Kakurai ◽  
...  

2009 ◽  
Vol 24 (7) ◽  
pp. 2435-2448 ◽  
Author(s):  
Walairat Bumrongjaroen ◽  
Richard A. Livingston ◽  
Dan A. Neumann ◽  
Andrew J. Allen

Partial replacement of hydrating Portland cement by fly ash produces competing effects: it contributes calcium hydrate silicate (C-S-H) gel through the pozzolanic and alkali-activated reactions but dilutes the contribution of the main Portland cement reaction. To investigate this, two neutron-scattering methods were applied to density-fractionated lignite-type and bituminous-type fly ash/Portland cement pastes (20% by mass replacement). Small-angle neutron scattering (SANS) measured the effect of the fly ash on the fractal C-S-H microstructure, whereas inelastic neutron scattering (INS) measured the pozzolanic reaction in terms of calcium hydroxide (CH) consumption. The CH consumption increased with the effective density fraction, and the fractal microstructure evolved more slowly for all fly ash mixes compared with the pure cement control. However, gel volume measured by SANS showed no correlation with the CH consumption measured by INS. The implications of these results are discussed.


1994 ◽  
Vol 351 ◽  
Author(s):  
J.M. Nicol ◽  
T.J. Udovic ◽  
R.R. Cavanagh ◽  
Z. Xu ◽  
S. Kawi ◽  
...  

ABSTRACTIncoherent inelastic neutron scattering (IINS) measurements of hydrogen bound to Ir6 clusters in the nanoscale pores of zeolite NaY and similar clusters in KL zeolite are reported. On the basis of hydrogen uptake measurements and the observation of peaks in the IINS spectra, we infer that hydrogen is bound to the metal nanoclusters in the zeolite pores. The HINS data for both zeolites are similar and consistent with the presence of IrH2 species.


Carbon ◽  
2011 ◽  
Vol 49 (5) ◽  
pp. 1663-1671 ◽  
Author(s):  
Raina J. Olsen ◽  
Lucyna Firlej ◽  
Bogdan Kuchta ◽  
Haskell Taub ◽  
Peter Pfeifer ◽  
...  

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

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

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