Doping Effect of CdO on the Oxidation of Carbon Monoxide over CdO-${\alpha}-Fe_2O_3$System

CdO-${\alpha}-Fe_2O_3$촉매상에서 일산화탄소의 산화반응에 대한 CdO의 첨가 효과

  • 이성한 (연세대학교 이과대학 화학과) ;
  • 김용록 (연세대학교 이과대학 화학과) ;
  • 김규홍 (연세대학교 이과대학 화학과) ;
  • 최재시 (연세대학교 이과대학 화학과)
  • Published : 1985.04.20


The oxidation reaction of CO on the catalysts 4 mol%, 8 mol%, and 12 mol% Cd-doped ${\alpha}-Fe_2O_3$ is individually investigated. Regardless of Cd doping level, over-all reaction order for the oxidation of CO is 1.5; the first order with respect to CO and the one-half order with respect to $O_2$. Over the temperature range of 350∼$460^{\circ}C$, the activation energy for CO oxidation is 10.10∼11.30Kcal/mol. From the agreement between the kinetic data and conductivity measurements, the reaction mechanism is suggested. Especially from the effect of Cd doping, the fact that catalytic activity of ${\alpha}-Fe_2O_3$ is due to the excitation of electrons which are traped on oxygen vacancy is found, and the adsorption sites for reactant molecules are found.



  1. J. Amer. Chem. Soc. v.52 S.L. Blank;J.A. Pask
  2. Proceedings of the International Symposium on the Reactivity of Solid P.Y. Eveno;M.P. Paulis;John Wood(ed.)
  3. J. Catalysis v.88 K.H. Kim;S.H. Lee;Y.R. Kim;J.S. Choi
  4. Surface Science John L. Gland;Brett A. Sexton;Galen B. Fisher
  5. Proceedings of the 7th International Symposium on the Reactivity of Solids D. Cerovic I. Momcilovic;S.J. Kiss;S. MaIsie;J. S. Anderson(ed.)
  6. Chemistry of Imperfect Crystals F.A. Kroger
  7. J. Catal. v.3 B.M. Arghiropoulos;S. J. Teichner
  8. Bull. Chem. Soc. Japan v.46 J.S. Choi;B.W. Kim
  9. J. Phys. Chem. v.83 K.H. Kim;H.S. Han;J.S. Choi
  10. Discuss Faraday Soc. v.41 P. Ambigues;S.J. Teichner
  11. J. Appl. Phys. v.47 no.11 P. Morgen;J.H. Onsagard;S. Tougaard
  12. Reactivity of Solids P.A. Barnes;F.S. Stone;J.W. Mitchell,(ed.)
  13. Chemi-sorption D.O. Hayward;B.M.W. Trapnell
  14. J. Phys. Chem. Solids S.H. Lee;K.H. Kim;J.S. Choi
  15. Hand Book of Preparative Inorganic Chemistry(2nd Ed.) v.2 G. Bauer
  16. Z. Elektrochem. v.46 R. Fricke;F. Blaschke
  17. J. Catal. v.39 W.R. Cares;J.W. Hightower
  18. J. Catal. v.37 M. Boudart;A. Delbouille;J.A. Dumesic;S. Khammouma;H. Topse
  19. J. Catalysis v.86 K.H. Kim;D. Kim;J.S. Choi
  20. Z. Phys. Chem. v.1 G.M. Schwab
  21. J. Amer. Chem. Soc. Leu. v.70 S. Weinhouse
  22. Discuss Faraday Soc. v.41 H. Chan;C.D. Prater
  23. Z. Phys. Chem. v.B44 C.Wanger;K. Hauffe
  24. Fundamentals of Inorganic Crystal Chemisty H. Krebs