Revealing Hydroxyapatite Nanoparticle Surface Structure by CO Adsorption: A Combined B3LYP and Infrared Study

2013 ◽  
Vol 117 (48) ◽  
pp. 25526-25534 ◽  
Author(s):  
Fabio Chiatti ◽  
Marta Corno ◽  
Yuriy Sakhno ◽  
Gianmario Martra ◽  
Piero Ugliengo
Keyword(s):  
Surface Structure ◽  
Co Adsorption ◽  
Infrared Study ◽  
Nanoparticle Surface

Infrared Study of CO Adsorption and Oxidation over Au/Al2O3Catalyst at 150 K

2001 ◽  
Vol 105 (15) ◽  
pp. 3017-3022 ◽  
Author(s):  
Jifei Jia ◽  
Junko N. Kondo ◽  
Kazunari Domen ◽  
Kenzi Tamaru
Keyword(s):  
Co Adsorption ◽  
Infrared Study

Active sites and states in the heterogeneous catalysis of carbon–hydrogen bonds

2005 ◽  
Vol 363 (1829) ◽  
pp. 879-900 ◽  
Author(s):  
Gabor A Somorjai ◽  
Anderson L Marsh
Keyword(s):  
Surface Structure ◽  
Active Sites ◽  
High Pressures ◽  
Bond Activation ◽  
Co Adsorption ◽  
Molecular Rearrangement ◽  
Platinum Surface ◽  
Bond Dissociation ◽  
Surface Mobility ◽  
Structure Sensitive

C–H bond activation for several alkenes (ethylene, propylene, isobutene, cyclohexene and 1-hexene) and alkanes (methane, ethane, n -hexane, 2-methylpentane and 3-methylpentane) has been studied on the (111) crystal face of platinum as a function of temperature at low (<10 −6  Torr) and high (≥1 Torr) pressures in the absence and presence of hydrogen pressures (≥10 Torr). Sum frequency generation (SFG) vibrational spectroscopy has been used to characterize the adsorbate structures and high pressure scanning tunnelling microscopy (HP-STM) has been used to monitor their surface mobility under reaction conditions during hydrogenation, dehydrogenation and CO poisoning. C–H bond dissociation occurs at low temperatures, approximately 250 K, for all of these molecules, although only at high pressures for the weakly bound alkanes because of their low desorption temperatures. Bond dissociation is known to be surface structure sensitive and we find that it is also accompanied by the restructuring of the metal surface. The presence of hydrogen slows down dehydrogenation and for some of the molecules it influences the molecular rearrangement, thus altering reaction selectivity. Surface mobility of adsorbates is essential to produce catalytic activity. When surface diffusion is inhibited by CO adsorption, ordered surface structures form and the reaction is poisoned. Ethylene hydrogenation is surface structure insensitive, while cyclohexene hydrogenation and dehydrogenation are structure sensitive. n -Hexane and other C 6 alkanes form either upright or flat-lying molecules on the platinum surface which react to produce branched isomers or benzene, respectively.

Comparative Infrared Study of the Surface Structure and Acidity of CoO (NiO)—MoO3—Al2O3Catalyst Prepared by Different Methods

1980 ◽  
Vol 123 (1) ◽  
pp. 115-128 ◽  
Author(s):  
F. J. Gil ◽  
J. L. García Fierro ◽  
A. López Agudo
Keyword(s):  
Surface Structure ◽  
Infrared Study

Infrared study of CO adsorption on Pd particles supported on NaCl(100)

2002 ◽  
Vol 517 (1-3) ◽  
pp. 115-122 ◽  
Author(s):  
Georges Sitja ◽  
Claude R Henry
Keyword(s):  
Co Adsorption ◽  
Infrared Study

Infrared study of CO adsorption on alumina supported palladium particles

1998 ◽  
Vol 402-404 ◽  
pp. 428-432 ◽  
Author(s):  
K Wolter ◽  
O Seiferth ◽  
J Libuda ◽  
H Kuhlenbeck ◽  
M Bäumer ◽  
...  
Keyword(s):  
Co Adsorption ◽  
Infrared Study ◽  
Supported Palladium ◽  
Palladium Particles

An infrared study of the influence of CO adsorption on the topology of supported ruthenium

1989 ◽  
Vol 115 (1) ◽  
pp. 107-119 ◽  
Author(s):  
F SOLYMOSI
Keyword(s):  
Co Adsorption ◽  
Infrared Study

Surface structure and energetics of oxygen and CO adsorption on α-Mo2C(0001)

2005 ◽  
Vol 596 (1-3) ◽  
pp. 212-221 ◽  
Author(s):  
Jun Ren ◽  
Chun-Fang Huo ◽  
Jianguo Wang ◽  
Yong-Wang Li ◽  
Haijun Jiao
Keyword(s):  
Surface Structure ◽  
Co Adsorption

scholarly journals Surface Structure of Untreated Parallel and Fishbone Carbon Nanofibres: An Infrared Study

ChemPhysChem ◽  
2002 ◽  
Vol 3 (2) ◽  
pp. 209-214 ◽  
Author(s):  
Tijmen George Ros ◽  
Adrianus Jacobus van Dillen ◽  
John Wilhelm Geus ◽  
Diederik Christiaan Koningsberger
Keyword(s):  
Surface Structure ◽  
Infrared Study ◽  
Carbon Nanofibres

An infrared study of NO and CO adsorption on a silica-supported Ru catalyst

1977 ◽  
Vol 49 (3) ◽  
pp. 332-344 ◽  
Author(s):  
A DAVYDOV
Keyword(s):  
Co Adsorption ◽  
Infrared Study ◽  
Ru Catalyst ◽  
No And Co Adsorption
Sign in / Sign up

Export Citation Format

Share Document