Comparative investigation of nickel aluminate (NiAl2O4) nano and microstructures for the structural, optical and catalytic properties

Polyhedron ◽  
2014 ◽  
Vol 72 ◽  
pp. 1-7 ◽  
Author(s):  
C. Ragupathi ◽  
J. Judith Vijaya ◽  
P. Surendhar ◽  
L. John Kennedy
Keyword(s):  
Catalytic Properties ◽  
Comparative Investigation ◽  
Nickel Aluminate

scholarly journals Cobalt‐Doped Nickel Aluminate Nanomaterials Synthesis, Characterization, and Catalytic Properties

2020 ◽  
Vol 393 (1) ◽  
pp. 2000163
Author(s):  
Prakash S. Patil ◽  
Ravindra S. Dhivare ◽  
Sunil R. Mirgane ◽  
Bharat G. Pawar ◽  
Tanaji R. Mane
Keyword(s):  
Catalytic Properties ◽  
Nickel Aluminate ◽  
Nanomaterials Synthesis

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.

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