Structure and Reactivity of Molecularly Adsorbed Ammonia on the ZrB2(0001) Surface

2014 ◽  
Vol 118 (50) ◽  
pp. 29260-29269 ◽  
Author(s):  
Kedar Manandhar ◽  
Weronika Walkosz ◽  
Yuan Ren ◽  
Shigeki Otani ◽  
Peter Zapol ◽  
...  
Keyword(s):  
Adsorbed Ammonia

Phase Transformation and Activity of Cadmium Sulfide Photocatalysts for Hydrogen Production from Water:  Role of Adsorbed Ammonia on Cadmium Sulfate Precursor

1998 ◽  
Vol 37 (12) ◽  
pp. 4682-4688 ◽  
Author(s):  
Namita Sahu ◽  
Manjit K. Arora ◽  
S. N. Upadhyay ◽  
A. S. K. Sinha
Keyword(s):  
Phase Transformation ◽  
Hydrogen Production ◽  
Cadmium Sulfide ◽  
Cadmium Sulfate ◽  
Adsorbed Ammonia

Probing atomic positions of adsorbed ammonia molecules in zeolite

2016 ◽  
Vol 52 (16) ◽  
pp. 3422-3425 ◽  
Author(s):  
Lin Ye ◽  
Benedict T.W. Lo ◽  
Jin Qu ◽  
Ian Wilkinson ◽  
Tim Hughes ◽  
...  
Keyword(s):  
X Ray Diffraction ◽  
Guest Molecules ◽  
X Ray ◽  
Adsorbed Ammonia ◽  
Experimental Errors ◽  
Zeolite P ◽  
First Time ◽  
Microporous Solids

The atomic positions and interactions between adsorbed guest molecules, such as ammonia in H-ZSM-5 microporous solids, are for the first time revealed by using in situ synchrotron powder X-ray diffraction combined with refinement within experimental errors.

Photo-assisted catalytic reduction of CO2 with pre-adsorbed ammonia on silica-supported iron

1992 ◽  
Vol 73 (2) ◽  
pp. 225-235 ◽  
Author(s):  
Kotaro Ogura ◽  
Akio Seno ◽  
Masato Kawano
Keyword(s):  
Catalytic Reduction ◽  
Adsorbed Ammonia ◽  
Reduction Of Co2 ◽  
Supported Iron

Influence of Silicon Content and Nature of the Template Molecule on Physico-Chemical and Catalytic Properties of SAPO-5

1992 ◽  
Vol 57 (4) ◽  
pp. 826-835 ◽  
Author(s):  
Jochen Jänchen ◽  
Vladimir Penchev ◽  
Elke Löffler ◽  
Barbara Parlitz ◽  
Helmut Stach
Keyword(s):  
Catalytic Activity ◽  
Molecular Sieves ◽  
Silicon Content ◽  
Silica Content ◽  
Template Molecule ◽  
Toluene Disproportionation ◽  
Physico Chemical ◽  
Adsorbed Ammonia ◽  
Temperature Programmed ◽  
Si Content

Two series of SAPO-5 molecular sieves were synthesized: (i) Using tripropylamine as a template and varying the Si content in the gel, and (ii) varying the template molecule at constant silicon content in the gel. The products were characterized physico-chemically and tested in toluene disproportionation. It was found that the rising silica content in the synthesis gel has only little influence on the SiO2 incorporation into the SAPO. Investigation of the acid character revealed that the concentrations of the adsorbed ammonia molecules are nearly constant and independent of the total silicon content of the crystals. The catalytic activity showed no correlation either with the silicon content of the catalysts or with the acidity measured by temperature-programmed desorption of ammonia. It is concluded that the incorporated silicon exists not only in a monomeric form and that the TPD of ammonia reflects not only the strong Bronsted acidity. The SAPO-5 sample synthesized with triethylamine possessed the strongest acidity corresponding to the highest catalytic activity. It is supposed that in the presence of TEA molecules silicon replaces mainly P atoms in the AlPO4-5 framework.

Hydrogen activated WOx-supported catalysts for Lewis acid transformation to Bronsted acid observed by in situ DRIFTS of adsorbed ammonia: Effect of different supports on the Lewis acid transformation

2020 ◽  
Vol 358 ◽  
pp. 370-386 ◽  
Author(s):  
Sirawat Boonpai ◽  
Kongkiat Suriye ◽  
Bunjerd Jongsomjit ◽  
Joongjai Panpranot ◽  
Piyasan Praserthdam
Keyword(s):  
Lewis Acid ◽  
Supported Catalysts ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
In Situ Drifts ◽  
Brönsted Acid ◽  
Adsorbed Ammonia

NMR Relaxation Times of Adsorbed Ammonia

1966 ◽  
Vol 45 (1) ◽  
pp. 311-320 ◽  
Author(s):  
J. Reuben ◽  
D. Fiat ◽  
M. Folman
Keyword(s):  
Relaxation Times ◽  
Nmr Relaxation ◽  
Adsorbed Ammonia ◽  
Nmr Relaxation Times
Sign in / Sign up

Export Citation Format

Share Document