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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 4
BKCSDE 33(4)
April 20, 2012 

 
Title
CO Oxidation of Catalytic Filters Consisting of Ni Nanoparticles on Carbon Fiber
Author
Hyun Ook Seo, Jong Won Nam, Kwang-Dae Kim, Young Dok Kim,* Dong Chan Lim
Keywords
Metal : Ni, CO oxidation, Carbon fiber, Chemical vapor deposition
Abstract
Catalytic filters consisting of Ni nanoparticle and carbon fiber with different oxidation states of Ni (either metallic or oxidic) were prepared using a chemical vapor deposition process and various post-annealing steps. CO oxidation reactivity of each sample was evaluated using a batch type quartz reactor with a gas mixture of CO (500 mtorr) and O2 (3 torr) at 300 oC. Metallic and oxidic Ni showed almost the same CO oxidation reactivity. Moreover, the CO oxidation reactivity of metallic sample remained unchanged in the subsequently performed second reaction experiment. We suggested that metallic Ni transformed into oxidic state at the initial stage of the exposure to the reactant gas mixture, and Ni-oxide was catalytically active species. In addition, we found that CO oxidation reactivity of Ni-oxide surface was enhanced by increase in the H2O impurity in the reactor.
Page
1199 - 1203
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