XPS characterization of sulphated zirconia catalysts: the role of iron

Surface and Interface AnalysisVolume 30, Issue 1 p. 77-80 Research Article XPS characterization of sulphated zirconia catalysts: the role of iron S. Ardizzone, Corresponding Author S. Ardizzone silvia.ardizzone@unimi.it Department of Physical Chemistry and Electrochemistry, University of Milan, Via Golgi 19, 20133 Milan, ItalyDepartment of Physical Chemistry and Electrochemistry, University of Milan, Via Golgi 19, 20133 Milan, ItalySearch for more papers by this authorC. L. Bianchi, C. L. Bianchi Department of Physical Chemistry and Electrochemistry, University of Milan, Via Golgi 19, 20133 Milan, ItalySearch for more papers by this author S. Ardizzone, Corresponding Author S. Ardizzone silvia.ardizzone@unimi.it Department of Physical Chemistry and Electrochemistry, University of Milan, Via Golgi 19, 20133 Milan, ItalyDepartment of Physical Chemistry and Electrochemistry, University of Milan, Via Golgi 19, 20133 Milan, ItalySearch for more papers by this authorC. L. Bianchi, C. L. Bianchi Department of Physical Chemistry and Electrochemistry, University of Milan, Via Golgi 19, 20133 Milan, ItalySearch for more papers by this author First published: 05 September 2000 https://doi.org/10.1002/1096-9918(200008)30:1<77::AID-SIA771>3.0.CO;2-OCitations: 60AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URLThe site is currently under maintenance and this functionality is not available right now. Please try later. Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract Sulphated zirconia powders have been prepared by impregnation, with either sulphuric acid or ammonium sulphate, of hydrous precursors precipitated at room temperature. Iron-promoted samples were prepared by mixing the sulphated zirconium hydroxide with ferric nitrate solutions. Samples containing increasing amounts of iron, in the absence of sulphates, were also obtained. All the samples have been calcined at the same temperature (470 °C) and for the same length of time (5 h), and have been characterized as to phase composition (using x-ray diffraction) and surface area (using BET). The acidity features of the powders were obtained by a revised Hammett–Bertolacini technique and the sulphur and iron contents were obtained by elemental analyses. X-ray photoelectron spectroscopy analyses of the samples have been obtained by elaboration of the S 2p and Zr 3d spectral regions. The outcome of the fitting procedures of the Zr 3d doublet of the different samples is presented and commented on in relation to the possible role played by sulphates and iron in the features of the oxide active surface sites. Copyright © 2000 John Wiley & Sons, Ltd. Citing Literature Volume30, Issue1Special Issue: Papers Presented at ECASIA 99August 2000Pages 77-80 RelatedInformation