Abstract
A set of La1−xA′xCo1−yFeyO3±δ samples (A′ = Ce,Sr; x = 0.1, 0.4, y = 0, 0.5, 0.8, 1) was prepared by means of the sol–gel citrate method and characterised through X-ray diffraction (XRD), N2 adsorption/desorption and temperature programmed desorption–reduction (TPD-TPR). Their activity for the catalytic flameless combustion of methane was tested and the results interpreted focusing on the effect of doping at A and/or B position. It was found that Ce doping of lanthanum ferrite catalysts could suppress suprafacial activity and slightly enhance intrafacial activity, due to the change of oxygen mobility. However, catalytic activity seems independent of the type of electronic conductivity (p- or n-type), the activity of an analogously Sr-doped sample being similar to that of the Ce-doped one. Mixed B-metal composition can help in modulating both oxygen mobility and catalyst stability under reducing reaction conditions. High Fe content allows to optimise this last parameter. However, depression of oxygen mobility and hence of activity has to be prevented by proper doping at A-position.
Similar content being viewed by others
References
Yamazoe N, Teraoka Y (1990) Catal Today 8:175
Peňa MA, Fierro JLG (2001) Chem Rev 101:1981
Fierro JLG (1993) In: Tejuca LG, Fierro JLG (eds) Properties and applications of perovskite-type oxides. M. Dekker, New York, p 195
Voorhoeve RJH, Remeika JP, Johnson DW (1973) Science 180:62
Steele BCH, Middleton PH, Rudkin RA (1990) Solid State Ionics 40/41:388
Teraoka Y, Zhang HM, Furukawa S, Yamazoe N (1985) Chem Lett 1743
Giacomuzzi RAM, Portinari M, Rossetti I, Forni L (2000) Stud Surf Sci Catal 130A:197
Leanza R, Rossetti I, Fabbrini L, Oliva C, Forni L (2000) Appl Catal B Environ 28:55
Fabbrini L, Rossetti I, Forni L (2003) Appl Catal B Environ 44:107
Ferri D, Forni L (1998) Appl Catal B Environ 16:119
Oliva C, Forni L, Vishniakov AV (2000) Spectrochim Acta Part A 56:301
Rossetti I, Forni L (2001) Appl Catal B Environ 33:345
Park S, Vohs JM, Gorte RJ (2000) Nature 404:265
Hibino T, Hashimoto A, Inoue T, Tokuno J, Yoshida S, Sano M (2000) Science 288:203
Baker RT, Metcalfe IS, Middleton PH, Steele BCH (1994) Sol St Ionics 72:328
Zhang HM, Yamazoe N, Teraoka Y (1998) J Mater Sci Lett 8:995
Beson SJ, Waller D, Kilner JA (1999) J Electrochem Soc 146:1305
Tsai CY, Dixon AG, Ma YH, Moser WR, Pascucci MR (1998) J Am Ceram Soc 81:1437
Xu Q, Huang D, Chen W, Lee J, Wang H, Yuan R (2004) Scripta Mater 50:165
Selected Powder X-Ray Diffraction Data, JCPDS, Swarthmore, PA, files no. 25–1060 and 37–1493
Forni L, Toscano M, Pollesel P (1991) J Catal 130:392
Campagnoli E, Tavares A, Fabbrini L, Rossetti I, Dubitsky Yu A, Zaopo A, Forni L (2005) Appl Catal B Environ 55:133
Szabo V, Bassir M, Van Neste A, Kaliaguine S (2003) Appl Catal B Environ 43:81
Szabo V, Bassir M, Van Neste A, Kaliaguine S (2002) Appl Catal B Environ 37:175
(a) Bard AJ, Parsons R, Jordan J (1985) Standard potentials in aqueous solutions, IUPAC, In: Dekker M (ed) New York (b) Kerr JA (2000) In: Lide DR (ed) CRC Handbook of Chemistry and Physics 1999–2000, 81st edn. CRC Press
Arai H, Yamada T, Eguchi K, Seiyama T (1986) Appl Catal 26:265
Doshi R, Alcock CB, Gunasekaran N, Carberry JJ (1993) J Catal 140:557
Shao Z, Dong H, Xiong G, Cong Y, Yang W (2001) J Membrane Sci 183:181
Acknowledgements
We are indebted to Pirelli Labs SpA for financial aid and for the permission to publish the present data.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Campagnoli, E., Tavares, A.C., Fabbrini, L. et al. La1−xA′xCo1−yFeyO3±δ (A′ = Ce,Sr) catalysts for the flameless combustion of methane. J Mater Sci 41, 4713–4719 (2006). https://doi.org/10.1007/s10853-006-0057-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10853-006-0057-0