The surface behaviour and catalytic properties of Nd2-XSrXCoO4±Λ mixed oxides

2006 ◽  
Vol 20 (2) ◽  
Author(s):  
Laitao Luo ◽  
Chengwen Liu ◽  
Hua Zhong
Keyword(s):  
Mixed Oxides ◽  
Catalytic Properties

Microstructure and reactivity of small metal particles: The role of Ce additives

1992 ◽  
Vol 50 (1) ◽  
pp. 318-319
Author(s):  
L.D. Schmidt ◽  
K. R. Krause ◽  
J. M. Schwartz ◽  
X. Chu
Keyword(s):  
Atmospheric Pressure ◽  
Noble Metals ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Chemical Shifts ◽  
Catalytic Converter ◽  
Structural Evolution ◽  
Single Particles ◽  
Small Metal Particles

The evolution of microstructures of 10- to 100-Å diameter particles of Rh and Pt on SiO2 and Al2O3 following treatment in reducing, oxidizing, and reacting conditions have been characterized by TEM. We are able to transfer particles repeatedly between microscope and a reactor furnace so that the structural evolution of single particles can be examined following treatments in gases at atmospheric pressure. We are especially interested in the role of Ce additives on noble metals such as Pt and Rh. These systems are crucial in the automotive catalytic converter, and rare earths can significantly modify catalytic properties in many reactions. In particular, we are concerned with the oxidation state of Ce and its role in formation of mixed oxides with metals or with the support. For this we employ EELS in TEM, a technique uniquely suited to detect chemical shifts with ∼30Å resolution.

Comparison of structural and catalytic properties of monometallic Mo and V oxides and M1 phase mixed oxides for oxidative dehydrogenation

2020 ◽  
Author(s):  
Leelavathi Annamalai ◽  
Sopuruchukwu Ezenwa ◽  
Yanliu Dang ◽  
Haiyan Tan ◽  
Steven L. Suib ◽  
...  
Keyword(s):  
Oxidative Dehydrogenation ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
M1 Phase

Electron Donating, Acid-Base and Catalytic Properties of Perovskite-Type Mixed Oxides of Rare Earths

1995 ◽  
Vol 60 (6) ◽  
pp. 977-982
Author(s):  
S. Sugunan ◽  
V. Meera
Keyword(s):  
Catalytic Activity ◽  
Electron Donor ◽  
Rare Earths ◽  
Electron Affinity ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Surface Acidity ◽  
Electron Acceptors ◽  
Acid Base ◽  
Perovskite Type

The electron donor properties of perovskite-type mixed oxides (LaFeO3, PrFeO3, SmFeO3, LaCoO3, PrCoO3, SmCoO3, LaNiO3, PrNiO3 and SmNiO3) were studied based on the adsorption of electron acceptors exhibiting different electron affinity viz. 7,7,8,8-tetracyanoquinodimethane, 2,3,5,6-tetrachloro-1,4-benzoquinone, p-dinitrobenzene, and m-dinitrobenzene. The surface acidity/basicity of the oxides was determined using a set of Hammett indicators. The data were correlated with the catalytic activity of the oxides for the reduction of cyclohexanone with 2-propanol.

A simple non-aqueous route to nano-perovskite mixed oxides with improved catalytic properties

2017 ◽  
Vol 287 ◽  
pp. 30-36 ◽  
Author(s):  
Liwei Hou ◽  
Hui Zhang ◽  
Lihua Dong ◽  
Li Zhang ◽  
Daniel Duprez ◽  
...  
Keyword(s):  
Mixed Oxides ◽  
Catalytic Properties

Synthesis and catalytic properties of mesoporous, bifunctional, gallium–niobium mixed oxides

2010 ◽  
Vol 46 (34) ◽  
pp. 6347 ◽  
Author(s):  
Chinmay A. Deshmane ◽  
Jacek B. Jasinski ◽  
Paul Ratnasamy ◽  
Moises A. Carreon
Keyword(s):  
Mixed Oxides ◽  
Catalytic Properties

Mixed oxides obtained from Co and Mn containing layered double hydroxides: Preparation, characterization, and catalytic properties

2006 ◽  
Vol 179 (3) ◽  
pp. 812-823 ◽  
Author(s):  
František Kovanda ◽  
Tomáš Rojka ◽  
Jana Dobešová ◽  
Vladimír Machovič ◽  
Petr Bezdička ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Double Hydroxides

Structural, Textural, and Catalytic Properties of Ti(IV)-Fe(III) Mixed Oxides Prepared by a Modified Sol-Gel Route

2017 ◽  
Vol 2 (2) ◽  
pp. 791-799
Author(s):  
Abbas Khaleel ◽  
Sulaiman Al-Zuhair ◽  
Said Al-Mamary ◽  
Maliha Parvin ◽  
Ahmad H. Khan
Keyword(s):  
Mixed Oxides ◽  
Catalytic Properties ◽  
Sol Gel
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