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. 2020 Aug 12;13(16):3551. doi: 10.3390/ma13163551

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© 2020 by the author.

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

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The outlet N₂ and CO₂ concentration profiles during temperature programmed reaction over La_1−xCe_xNiO₃ catalysts (0 ≤ x ≤ 0.05). Substitution degrees (x) are indicated within the figure. (a) Outlet N₂ concentration profiles and (b) outlet CO₂ concentration profiles. Reprinted with permission from [61]. Copyright © 2009, Elsevier, Inc.