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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 24, Number 3
JKCSEZ 24(3)
June 20, 1980

Title	Oxidation Reaction of CO and C2H4 on Zinc Oxide 수산화아연의 CO, C2H4의 산화반응
Author	Chong Soo Han, Hakze Chon 한종수, 전학제
Keywords
Abstract	산화아연에 흡착한 산소종과 CO, C2H4의 표면반응을 EPR 분광법을 사용하여 연구했다. (1) 25˚,100˚, 200˚, 300℃ 등 여러온도에서 산소가 흡착된 산화아연의 EPR 스펙트럼을 비교하여 g = 2.014의 피이크가 산소결합에 trap된 O-에서 나옴을 알았다. (2) 각 온도에서 산소가 흡차고딘 산화아연을 CO, C2H4와 접촉시켜 흡착종의 반응성을 알아보았으며, 안정한 O2-의 EPR스펙트럼을 이용하여 탈착된 표면을 검출했다. (3) 비교적 높은 온도에서 존재하는 O-는 25℃에서도 CO, C2H4와 반응하여 완전산화반응을 하며 생성된 흡착종들은 200℃에서 탈착되었다. (4) 180℃까지 주로 존재하는 O2-는 CO의 반응하지 않았고 C2H4와 반응하여 200℃에서 탈착되는 g=2.002의 등방성 EPR 스펙트럼을 갖는 생성물을 만들었다. The surface reactions of CO and C2H4 with adsorbed oxygen on ZnO were studied by means of EPR spectroscopy. The EPR spectra of O2 adsorbed ZnO at various temperatures were compared, and the signal at g = 2.014 was characterized as trapped O- at oxygen vacancy. CO and C2H4 react with O- at 25℃ and desorbed as CO2 and H2O above 200℃. O2- species interact with C2H4 about 100℃, but desorption of partial oxidation products also was not observed until the temperature was raised to 200℃.
Page	218 - 224
Full Text	PDF

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