Role of ambient dielectric in propagation of Ar atmospheric pressure nonequilibrium plasma jets

2015 ◽  
Vol 22 (5) ◽  
pp. 050703 ◽  
Author(s):  
Jian Song ◽  
Jingfeng Tang ◽  
Youyin Wang ◽  
Liqiu Wei ◽  
Chunsheng Ren ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Nonequilibrium Plasma ◽  
Plasma Jets

Effects of gas flow rate on the length of atmospheric pressure nonequilibrium plasma jets

2009 ◽  
Vol 95 (14) ◽  
pp. 141502 ◽  
Author(s):  
Qing Li ◽  
Jiang-Tao Li ◽  
Wen-Chao Zhu ◽  
Xi-Ming Zhu ◽  
Yi-Kang Pu
Keyword(s):  
Flow Rate ◽  
Atmospheric Pressure ◽  
Gas Flow ◽  
Nonequilibrium Plasma ◽  
Plasma Jets ◽  
Gas Flow Rate

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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