ChemInform Abstract: Molecular Studies of Model Surfaces of Metals from Single Crystals to Nanoparticles under Catalytic Reaction Conditions. Evolution from Prenatal and Postmortem Studies of Catalysts

ChemInform ◽  
2010 ◽  
Vol 41 (50) ◽  
pp. no-no
Author(s):  
Gabor A. Somorjai ◽  
Cesar Aliaga
Keyword(s):  
Single Crystals ◽  
Catalytic Reaction ◽  
Reaction Conditions ◽  
Model Surfaces ◽  
Molecular Studies ◽  
Postmortem Studies

Dimensionally-Controlled Hydrothermal Tm3+-doped Oxidic Nanocrystals and Their Photoluminescence Properties

2010 ◽  
Vol 1247 ◽  
Author(s):  
Rocío Calderón-Villajos ◽  
Carlos Zaldo ◽  
Concepción Cascales
Keyword(s):  
Single Crystals ◽  
Fluorescence Lifetimes ◽  
Photoluminescence Properties ◽  
Reaction Conditions ◽  
Hydrothermal Processes ◽  
Bulk Single Crystals ◽  
Template Free ◽  
Reaction Media

AbstractControlled reaction conditions in simple, template-free hydrothermal processes yield Tm-Lu2O3 and Tm-GdVO4 nanocrystals with well-defined specific morphologies and sizes. In both oxide families, nanocrystals prepared at pH 7 reaction media exhibit photoluminescence in ∼1.95 μm similar to bulk single crystals. For the lowest Tm3+ concentration (0.2 % mol) in GdVO4 measured 3H4 and 3F4 fluorescence lifetimes τ are very near to τrad.

Ligand free copper(i)-catalyzed synthesis of diaryl ether with Cs2CO3via a free radical path

2015 ◽  
Vol 44 (27) ◽  
pp. 12086-12090 ◽  
Author(s):  
Hong-Jie Chen ◽  
Mei-Chun Tseng ◽  
I-Jui Hsu ◽  
Wei-Ting Chen ◽  
Chien-Chung Han ◽  
...  
Keyword(s):  
Free Radical ◽  
Catalytic Reaction ◽  
Coupling Reaction ◽  
Reaction Conditions ◽  
Esi Ms ◽  
Ms Analysis ◽  
Diaryl Ether ◽  
Ligand Free

Complexes [Cu(i)(2,4-dimethylphenoxy)2]− (A) and [Cu(ii)(2,4-dimethylphenoxy)2(p-tolyl)]− (B) were observed by in situ ESI-MS analysis of the ligand free copper(i)-catalyzed C–O coupling reaction using Cs2CO3 under the catalytic reaction conditions.

In situ AP-XPS study on reduction of oxidized Rh catalysts under CO exposure and catalytic reaction conditions

2021 ◽  
Vol 54 (20) ◽  
pp. 204005
Author(s):  
Ryo Toyoshima ◽  
Kohei Ueda ◽  
Yuki Koda ◽  
Hiroshi Kodama ◽  
Hirosuke Sumida ◽  
...  
Keyword(s):  
Catalytic Reaction ◽  
Reaction Conditions ◽  
Xps Study

Three consecutive steps over the chirally modified Pt surface: asymmetric catalytic cascade reaction of 2-nitrophenylpyruvates

2015 ◽  
Vol 5 (2) ◽  
pp. 697-704 ◽  
Author(s):  
György Szőllősi ◽  
Lenke Kovács ◽  
Zsolt Makra
Keyword(s):  
Metal Surface ◽  
Catalytic Reaction ◽  
Cascade Reaction ◽  
Heterogeneous Catalytic Reaction ◽  
Reaction Conditions ◽  
Asymmetric Catalytic ◽  
Heterogeneous Catalytic

The influence of the reaction conditions on the asymmetric heterogeneous catalytic reaction of 2-nitrophenylpyruvates over Pt modified with cinchonidine showed that all three steps of the cascade occur on the metal surface.

Oxidation of Benzaldehyde to Benzoic Acid with Aqueous Hydrogen Peroxide over Dodecatungstophosphoric Acid

2013 ◽  
Vol 781-784 ◽  
pp. 219-222
Author(s):  
Qiu Ying Huang ◽  
Bei Bei Dong ◽  
Xiu Cheng Zheng
Keyword(s):  
Hydrogen Peroxide ◽  
Benzoic Acid ◽  
Catalytic Reaction ◽  
Type Structure ◽  
Optimal Parameters ◽  
Reaction Parameters ◽  
Aqueous Hydrogen Peroxide ◽  
Reaction Conditions ◽  
Prepared Sample ◽  
Keggin Type

Dodecatungstophosphoric acid was synthesized and used as catalyst for oxidation of benzaldehyde to benzoic acid with aqueous hydrogen peroxide. The effect of various catalytic reaction parameters including time, temperatures, and the amount of catalyst on the yield of benzoic acid was investigated in details. The results indicated that the as-prepared sample was in the keggin-type structure and the optimal parameters under the reaction conditions were as follows: 0.5 g of catalyst, reacted at 80 C for 5 h.

Monodisperse Metal Nanoparticle Catalysts: Synthesis, Characterizations, and Molecular Studies Under Reaction Conditions

2012 ◽  
Vol 55 (19-20) ◽  
pp. 1257-1275 ◽  
Author(s):  
Vladimir V. Pushkarev ◽  
Zhongwei Zhu ◽  
Kwangjin An ◽  
Antoine Hervier ◽  
Gabor A. Somorjai
Keyword(s):  
Metal Nanoparticle ◽  
Reaction Conditions ◽  
Nanoparticle Catalysts ◽  
Molecular Studies

Pronounced Size Dependence in Structure and Morphology of Gas-Phase Produced, Partially Oxidized Cobalt Nanoparticles under Catalytic Reaction Conditions

ACS Nano ◽  
2015 ◽  
Vol 9 (6) ◽  
pp. 5984-5998 ◽  
Author(s):  
Stephan Bartling ◽  
Chunrong Yin ◽  
Ingo Barke ◽  
Kevin Oldenburg ◽  
Hannes Hartmann ◽  
...  
Keyword(s):  
Gas Phase ◽  
Catalytic Reaction ◽  
Size Dependence ◽  
Cobalt Nanoparticles ◽  
Reaction Conditions ◽  
Structure And Morphology

Interactions of the SiHxCly Silicon Species with the Si4H9 Cluster

1992 ◽  
Vol 57 (2) ◽  
pp. 248-254
Author(s):  
Jaroslav Burda ◽  
Michal Bureš ◽  
Čestmír Černý
Keyword(s):  
Crystal Growth ◽  
Epitaxial Growth ◽  
Single Crystals ◽  
Surface Reaction ◽  
Reaction Conditions ◽  
Technological Method

The CNDO/2 method was applied to the investigation of the surface reaction occurring during the epitaxial growth of silicon single crystals. The aim of the work was to find silicon species from which the crystal growth is possible under the reaction conditions chosen to comply with the application of the CVD technological method. Calculations suggest that the SiH2, SiHCl and SiH3 species are feasible for the further growth.

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