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Ceria‐based nanomaterials as catalysts for CO oxidation and soot combustion: Effect of Zr‐Pr doping and structural properties on the catalytic activity
Author(s) -
Piumetti Marco,
Andana Tahrizi,
Bensaid Samir,
Fino Debora,
Russo Nunzio,
Pirone Raffaele
Publication year - 2017
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.15548
Subject(s) - soot , catalysis , zirconium , materials science , combustion , inorganic chemistry , nanomaterials , chemical engineering , praseodymium , catalytic combustion , chemistry , nanotechnology , organic chemistry , engineering
In this work, we investigated a set of ceria‐based catalysts prepared by the hydrothermal and solution combustion synthesis. For the first time to our knowledge, we synthesized nanocubes of ceria doped with zirconium and praseodymium. The catalysts were tested for the CO and soot oxidation reactions. These materials exhibited different surface reducibility, as measured by H 2 ‐TPR, CO‐TPR and Soot‐TPR, despite their comparable chemical compositions. As a whole, Soot‐TPR appears a suitable characterization technique for the soot oxidation catalysts, whereas CO‐TPR technique allows to better discriminate among the CO oxidation activities. Praseodymium contributes positively toward the soot oxidation. On the other hand, it has an adverse effect on the CO oxidation over the same catalysts, as compared to pure ceria. The incorporation of zirconium into the ceria lattice does not have a direct beneficial effect on the soot oxidation activity, although it increases the catalyst performances for CO oxidation. © 2016 American Institute of Chemical Engineers AIChE J , 63: 216–225, 2017