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. 2016 Apr 13;21(4):486. doi: 10.3390/molecules21040486

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© 2016 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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IR spectra of CO adsorbed on Au/TiO₂ (a) and Au/M_xO_y/TiO₂ (M_xO_y = La₂O₃, CeO₂ or Fe₂O₃) (b–d) catalysts pretreated at 300 °C for 1 h in hydrogen or oxygen atmosphere.