In Situ EPR Monitoring of Chromium Species Formed during Cr−Pyrrolyl Ethylene Trimerization Catalyst Formation

2010 ◽  
Vol 29 (13) ◽  
pp. 2943-2950 ◽  
Author(s):  
Igor Y. Skobelev ◽  
Valentina N. Panchenko ◽  
Oleg Y. Lyakin ◽  
Konstantin P. Bryliakov ◽  
Vladimir A. Zakharov ◽  
...  
Keyword(s):  
Chromium Species ◽  
Ethylene Trimerization ◽  
Catalyst Formation

Monitoring Structure and Valence State of Chromium Sites during Catalyst Formation and Ethylene Oligomerization by in Situ EPR Spectroscopy

2008 ◽  
Vol 27 (15) ◽  
pp. 3849-3856 ◽  
Author(s):  
Angelika Brückner ◽  
Jabor K. Jabor ◽  
Ann E. C. McConnell ◽  
Paul B. Webb
Keyword(s):  
Epr Spectroscopy ◽  
Valence State ◽  
Ethylene Oligomerization ◽  
Catalyst Formation

Task-specific ionic liquid based in situ dispersive liquid–liquid microextraction for the sequential extraction and determination of chromium species: optimization by experimental design

RSC Advances ◽  
2015 ◽  
Vol 5 (74) ◽  
pp. 60621-60629 ◽  
Author(s):  
Susan Sadeghi ◽  
Ali Zeraatkar Moghaddam
Keyword(s):  
Ionic Liquid ◽  
Absorption Spectrometry ◽  
Selective Extraction ◽  
Chromium Species ◽  
Flame Atomic Absorption ◽  
Dispersive Liquid Liquid Microextraction ◽  
Task Specific Ionic Liquid ◽  
Liquid Microextraction

An optimised task specific ionic liquid-basedin situdispersive liquid–liquid microextraction (in situTSIL-DLLME) with flame atomic absorption spectrometry (FAAS) methodology was developed for the selective extraction of Cr(iii) and Cr(vi) species.

ChemInform Abstract: Reversible in situ Catalyst Formation

ChemInform ◽  
2008 ◽  
Vol 39 (23) ◽  
Author(s):  
Jason P. Hallett ◽  
Pamela Pollet ◽  
Charles L. Liotta ◽  
Charles A. Eckert
Keyword(s):  
Catalyst Formation

ChemInform Abstract: Palladium-Catalyzed Reaction of a Malonate Anion with a Glycine Cation Equivalent: Bis-Phosphine Ligands and in situ Catalyst Formation.

ChemInform ◽  
2010 ◽  
Vol 26 (39) ◽  
pp. no-no
Author(s):  
M. J. O'DONNELL ◽  
C. ZHOU ◽  
A. MI ◽  
N. CHEN ◽  
J. A. KYLE ◽  
...  
Keyword(s):  
Phosphine Ligands ◽  
Palladium Catalyzed ◽  
Catalyst Formation

scholarly journals Direct Observation of Ni–Mo Catalyst Formation via Thermal Reduction of Nickel Molybdate Nanorods

2020 ◽  
Author(s):  
Rituja Patil ◽  
Stephen House ◽  
Aayush Mantri ◽  
Judith C. Yang ◽  
James McKone
Keyword(s):  
Hydrogen Evolution ◽  
Thermal Reduction ◽  
Core Shell ◽  
Chemical Transformations ◽  
Nickel Molybdate ◽  
Mo Catalyst ◽  
Transmission Electron ◽  
Catalyst Formation ◽  
Exchange Membrane

Ni-Mo composites are known to catalyze several industrial relevant reactions involving hydrogen. Our interest is in Ni-Mo composites for hydrogen evolution reaction in alkaline anion exchange membrane water electrolyzers. We recently found that Ni-Mo composites comprise of core-shell structure where the core is metallic, rich in Ni while the shell is Mo-rich oxide. The transformation of the oxide intermediate into a core-shell architecture is studied in this work using <i>in situ</i> transmission electron microscopy. We reduced nickel molybdate nanorods in environmental transmission electron microscope and observed its transformation into the Ni-Mo catalyst composite. We further correlated these chemical transformations with the observed hydrogen evolution activity.

scholarly journals Direct Observation of Ni–Mo Catalyst Formation via Thermal Reduction of Nickel Molybdate Nanorods

2020 ◽  
Author(s):  
Rituja Patil ◽  
Stephen House ◽  
Aayush Mantri ◽  
Judith C. Yang ◽  
James McKone
Keyword(s):  
Hydrogen Evolution ◽  
Thermal Reduction ◽  
Core Shell ◽  
Chemical Transformations ◽  
Nickel Molybdate ◽  
Mo Catalyst ◽  
Transmission Electron ◽  
Catalyst Formation ◽  
Exchange Membrane

Ni-Mo composites are known to catalyze several industrial relevant reactions involving hydrogen. Our interest is in Ni-Mo composites for hydrogen evolution reaction in alkaline anion exchange membrane water electrolyzers. We recently found that Ni-Mo composites comprise of core-shell structure where the core is metallic, rich in Ni while the shell is Mo-rich oxide. The transformation of the oxide intermediate into a core-shell architecture is studied in this work using <i>in situ</i> transmission electron microscopy. We reduced nickel molybdate nanorods in environmental transmission electron microscope and observed its transformation into the Ni-Mo catalyst composite. We further correlated these chemical transformations with the observed hydrogen evolution activity.

scholarly journals Rare-earth metal diisopropylamide-catalyzed intramolecular hydroamination

2016 ◽  
Vol 45 (41) ◽  
pp. 16393-16403 ◽  
Author(s):  
Tatiana Spallek ◽  
Reiner Anwander
Keyword(s):  
Rare Earth ◽  
Alkali Metal ◽  
Rare Earth Metal ◽  
Earth Metal ◽  
Donor Solvent ◽  
Catalyst Formation

Well-defined rare-earth metal diisopropylamide complexes provide an exemplary case study to investigate the effect of donor solvent, alkali metal, chloro co-ligands, and in situ catalyst formation.

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