CO Oxidation of Catalytic Filters Consisting of Ni Nanoparticles on Carbon Fiber

• Published in: Bulletin of the Korean Chemical Society Vol. 33; no. 4; pp. 1199 - 1203
• Main Authors: Seo, Hyun-Ook, Nam, Jong-Won, Kim, Kwang-Dae, Kim, Young-Dok, Lim, Dong-Chan
• Format: Journal Article
• Language: English
• Published: 대한화학회 20.04.2012
• Subjects: 화학
• ISSN: 0253-2964; 1229-5949
• DOI: 10.5012/bkcs.2012.33.4.1199

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. KCI Citation Count: 0