Stabilization of catalyst particles against sintering on oxide supports with high oxygen ion lability exemplified by Ir-catalyzed decomposition of N2O
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- 作者：Ioannis V. Yentekakisa ; yyentek@isc.tuc.gr" class="auth_mail" title="E-mail the corresponding author ; Grammatiki Goulaa ; Paraskevi Panagiotopouloua ; Stavroula Kampouria ; Martin J. Taylorb ; c ; Georgios Kyriakoub ; c ; G.Kyriakou@aston.ac.uk" class="auth_mail" title="E-mail the corresponding author ; Richard M. Lambertd ; e ; rml1@cam.ac.uk" class="auth_mail" title="E-mail the corresponding author
- 关键词：Sintering ; Nanoparticle stabilization ; Oxide supports ; Oxygen ion lability ; Ostwald ripening ; Particle diffusion ; Catalytic N2O decomposition ; Iridium ; Iridium oxide ; Ceria ; Gadolinia ; Zirconia ; Alumina
- 刊名：Applied Catalysis B: Environmental
- 出版年：2016
- 出版时间：5 September 2016
- 年：2016
- 卷：192
- 期：Complete
- 页码：357-364
- 全文大小：2112 K
文摘
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Supports with high oxygen lability strongly stabilize iridium nanoparticles at oxidizing conditions.
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Iridium nanoparticles on low oxygen lability supports are prone to thermal sintering.
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Oxygen ion spillover from the support to particle surface is responsible for sintering resistance.
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Ir-catalyzed N2O decomposition intrinsic activity is strongly favored on large iridium particles.