Active sites over CuO/CeO2 and inverse CeO2/CuO catalysts for preferential CO oxidation

S. Zeng, Y. Wang, Siyuan Ding, J.J.H.B. Sattler, E. Borodina, L. Zhang, B.M. Weckhuysen, H. Su

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

A series of CuO/CeO 2 and inverse CeO 2 /CuO catalysts are prepared by the surfactant-templated method and characterized via XRD, HRTEM, H 2 -TPR, SEM, XPS, in situ XRD, in situ UV-Vis and N 2 adsorption-desorption techniques. It is found that there are two kinds of surface sites in the CuO-CeO 2 system, including CuO surface sites for CO chemisorption and CeO 2 surface sites with oxygen vacancies for oxygen sorption. The active sites for CO oxidation are located on the contact interface of two-kind surface sites and the lattice oxygen can make a significant contri bution to the CO-PROX reaction. The resistance to H 2 O and CO 2 is related to BET surface area, the crystallite sizes of CuO and the reduction behavior of catalysts. The Ce4Cu4 and Ce4Cu1 catalysts exhibit the best resistance against H 2 O and CO 2 . © 2014 Elsevier B.V. All rights reserved.
Original languageEnglish
JournalJournal of Power Sources
Volume256
DOIs
Publication statusPublished - 2014

Keywords

  • Active site
  • Copper-ceria catalysts
  • Hydrogen
  • Preferential CO oxidation

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