Redox Property of Transition Metal Oxides in Catalytic Oxidation

TPR/TPO 실험기법을 이용한 전이금속산화물의 산화-환원 특성 연구

  • Kim, Young-Ho (Department of Chemical Engineering, Kunsan National University) ;
  • Lee, Ho-In (School of Chemical Engineering, Seoul National University)
  • 김영호 (군산대학교 화학공학과) ;
  • 이호인 (서울대학교 응용화학부)
  • Received : 1999.08.04
  • Accepted : 1999.11.27
  • Published : 1999.12.10


The redox property of oxide materials of the 3rd period transition metals(Cr~Zn), V, Mo, and W was studied with temperature-programmed reduction/temperature-programmed oxidation(TPR/TPO) experiment. The peak temperatures of TPO spectra were equal to or lower than those of TPR spectra. And the peak shapes of TPO spectra were broader than those of TPR ones. The activation energies of TPR/TPO for the oxides of the 3rd period transition metals showed in the range of 33~149 kJ/mol, while for the oxides of V, Mo, and W, they showed relatively higher values. The change of activation energies of TPR/TPO with various metal oxides showed a similar trend to the change of their metal-oxygen bond strengths. The change of activation energies of o-xylene oxidation for various metal oxides was proportional to the difference (${\Delta}E_a$) between the activation energy of TPR and that of TPO. From these results, we concluded that the oxidation of o-xylene over various metal oxide catalysts follows the Mars-van Krevelen mechanism including the surface reduction-oxidation of the metal oxide itself.


temperature-programmed reduction(TPR);temperature-programmed oxidation(TPO);transition metal oxides;o-xylene oxidation


Supported by : 한국과학재단


  1. Temperature programmed Reduction for Solid Materials Characterization A. Jones;B. D. McNicol
  2. Rev. -Sci. Eng. v.26 R. R. Chianelli
  3. J. Catal. v.106 J. S. Lee;S. T. Oyama;M. Boudart
  4. New Horizons in Catalysis M. Ai;T. Seiyama(ed.);K. Tanabe(ed.)
  5. 공업화학 v.2 이근대;이호인
  6. J. Catal. v.116 D. C. Vermaire;P. C. van Berge
  7. J. Catal. v.106 Tang Ren-Yuan;Zhang Su;Wang Chengyu;Liang Dongbai;Lin Liwu
  8. J. Catal v.97 B. A. Sexton;A. E. Hughes;T. W. Turney
  9. J. Catal v.99 B. Viswanathan;R. Gopalakrishnan
  10. J. Catal v.63 E. E. Unmuth;L. H. Schwartz;J. B. Butt
  11. J. Chem. Soc. Faraday Trans. Ⅰ. v.77 S. J. Gentry;N. W. Hurst;A. Jones
  12. J. Chem. Soc. Faraday Trans. Ⅰ. v.75 S. J. Gentry;N. W. Hurst;A. Jones
  13. Chem. Eng. Sci. Spec. Suppl. v.3 P. Mars;D. W. van Krevelen
  14. Appl. Catal. v.3 R. Brown;M. E. Cooper;D. A. Whan
  15. J. Catal. v.97 H. F. J. Van't Blik;R. Prins
  16. Bull. Korean Chem. Soc. Y. H. Kim;H.-I. Lee
  17. Catal. Rev. -Sci. Eng. v.19 M. S. Wainwright;N. R. Foster
  18. Solid State Chemistry in Catalysis R. K. Grasselli;J. F. Brazdil
  19. Catal. Rev. -Sci. Eng. v.10 L. K. Doraiswamy;D. G. Tajbl
  20. Adv. Catal. v.17 R. J. Cvetanovic;Y. Amenomiya
  21. J. Catal v.83 M. Gasior;T. Machej
  22. Surface and Near-Surface Chemistry of Oxide Materials J. Nowotny;L. -C. Dufour
  23. J. Catal. v.37 S. D. Robertson;B. D. McNicol;J. H. de Baas;S. C. Kloet;J. W. Jenkins
  24. Catal. Rev. Sci. Eng. v.19 J. Haber;A. Bielanski
  25. J. Phys. Chem. v.73 Y. Kera;K. Hirota
  26. J. Catal v.76 J. Zielinski
  27. Transition Metal Oxides H. H. Kung
  28. Adsorption and Catalysis on Oxide Surfaces M. Che;M. Che(ed.);G. C. Bond(ed.)
  29. Gordon Research Conference on Catalysis J. W. Jenkins