Three examples are revisited in which the reaction rate could be reliably correlated with point defect chemistry highlighting the role of point defects as acid–base active centers. In the case of dehydrohalogenation of tertiary butyl chloride, AgCl becomes increasingly active as heterogeneous catalyst, if AgCl is homogeneously or heterogeneously doped. By such a procedure the silver vacancy concentration is adequately increased. The oxygen incorporation into SrTiO3 offers an example in which the surface mechanism in terms of adsorbed species, oxygen vacancies and electronic centers has been elucidated. Appropriate surface coatings give rise to significant catalytic effects. Increasing iron (acceptor) doping not only changes the point defect chemistry but also the nature of the rate determining step. Lastly, the electrocatalytic function of Sr-doped LaMnO3 is considered as regards oxygen reduction reaction and O2− incorporation into Y-doped ZrO2 in the context of solid oxide fuel cells. Again the defect chemistry is of prime importance for the reaction rate.
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References
J. Maier (2004) Physical Chemistry of Ionic Materials. Ions and Electrons in Solids John Wiley & Sons Chichester
J. Maier (2001) Chem. Eur. J. 7 4762 Occurrence Handle1:CAS:528:DC%2BD3MXovFentLo%3D Occurrence Handle10.1002/1521-3765(20011119)7:22<4762::AID-CHEM4762>3.0.CO;2-F
G. Simkovich C. Wagner (1962) J. Catal. 1 521 Occurrence Handle1:CAS:528:DyaF2cXhtlCmtA%3D%3D Occurrence Handle10.1016/0021-9517(62)90124-0
F.A. Kröger (1964) Chemistry of Imperfect Crystals North-Holland Amsterdam
J. Maier P. Murugaraj (1989) Solid State Ionics 32 993 Occurrence Handle10.1016/0167-2738(89)90351-2
The absolute eff values reported in [5] are not normalized with respect to the available catalyst’s area, but since the area was to good approximation the same for all three samples, this would not alter the qualitative conclusions
M. Leonhardt R.A. De Souza J. Claus J. Maier (2002) J. Electrochem. Soc. 149 J19 Occurrence Handle1:CAS:528:DC%2BD38XhtlKnsLY%3D Occurrence Handle10.1149/1.1430723
R. Merkle J. Maier (2002) Phys. Chem. Chem. Phys. 4 4140 Occurrence Handle1:CAS:528:DC%2BD38Xmt1Gntr0%3D Occurrence Handle10.1039/b204032h
C. Argirusis S. Wagner W. Menesklou C. Warnke T. Damjanovic G. Borchardt E. Ivers-Tiffee (2005) Phys. Chem. Chem. Phys. 7 3523 Occurrence Handle1:CAS:528:DC%2BD2MXhtVKlsrnL Occurrence Handle10.1039/b510834a
R. Merkle, J. Maier, submitted to Solid State Ionics
R.A. De Souza J. Kilner (1999) Solid State Ionics 126 153 Occurrence Handle1:CAS:528:DC%2BD3cXhtVajsrc%3D Occurrence Handle10.1016/S0167-2738(99)00228-3
T. Ishigaki S. Yamauchi K. Kishio J. Mizusaki K. Fueki (1988) J. Solid State Chem. 73 179 Occurrence Handle1:CAS:528:DyaL1cXktFGjtLg%3D Occurrence Handle10.1016/0022-4596(88)90067-9
J.A. Kilner R.A. De Souza I.C. Fullarton (1996) Solid State Ionics 86 703 Occurrence Handle10.1016/0167-2738(96)00153-1
R. Merkle J. Maier H.J.M. Bouwmeester (2004) Angew. Chem. Int. Ed. 43 5069 Occurrence Handle1:CAS:528:DC%2BD2cXotlKrt78%3D Occurrence Handle10.1002/anie.200460081
V. Brichzin J. Fleig H.-U. Habermeier G. Cristiani J. Maier (2002) Solid State Ionics 152 499 Occurrence Handle10.1016/S0167-2738(02)00379-X
P. Mars D.W. Krevelen Particlevan (1954) Chem. Eng. Sci. 3 41 Occurrence Handle1:CAS:528:DyaG28Xks1Wq
H. R. Kim, J. Fleig, J. Maier, to be published
J. Fleig (2005) Phys. Chem. Chem. Phys. 7 2027 Occurrence Handle1:CAS:528:DC%2BD2MXjsFagt70%3D Occurrence Handle10.1039/b501086a
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Merkle, R., Maier, J. The significance of defect chemistry for the rate of gas–solid reactions: three examples. Top Catal 38, 141–145 (2006). https://doi.org/10.1007/s11244-006-0079-5
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DOI: https://doi.org/10.1007/s11244-006-0079-5