Heterophase-structured nanocrystals as superior supports for Ru-based catalysts in selective hydrogenation of benzene

ZrO(2) heterophase structure nanocrystals (HSNCs) were synthesized with tunable ratios of monoclinic ZrO(2) (m-ZrO(2)) to tetragonal ZrO(2) (t-ZrO(2)). The phase mole ratio of m-ZrO(2) versus t-ZrO(2) in ZrO(2) HSNCs was tuned from 40% to 100%. The concentration of the surface hydroxyl groups on m-Z...

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Detalles Bibliográficos
Autores principales: Peng, Zhikun, Liu, Xu, Li, Shuaihui, Li, Zhongjun, Li, Baojun, Liu, Zhongyi, Liu, Shouchang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5216362/
https://www.ncbi.nlm.nih.gov/pubmed/28057914
http://dx.doi.org/10.1038/srep39847
Descripción
Sumario:ZrO(2) heterophase structure nanocrystals (HSNCs) were synthesized with tunable ratios of monoclinic ZrO(2) (m-ZrO(2)) to tetragonal ZrO(2) (t-ZrO(2)). The phase mole ratio of m-ZrO(2) versus t-ZrO(2) in ZrO(2) HSNCs was tuned from 40% to 100%. The concentration of the surface hydroxyl groups on m-ZrO(2) is higher than that on t-ZrO(2). ZrO(2) HSNCs have different surface hydroxyl groups on two crystalline phases. This creates more intimate synergistic effects than their single-phase counterparts. The ZrO(2) HSNCs were used as effective supports to fabricate heterophase-structured Ru/ZrO(2) catalysts for benzene-selective hydrogenation. The excellent catalytic performance including high activity and selectivity is attributed to the heterogeneous strong/weak hydrophilic interface and water layer formed at the m-ZrO(2)/t-ZrO(2) catalyst junction.

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