纳米材料基催化剂
溶解
催化作用
面(心理学)
纳米颗粒
化学工程
超临界流体
材料科学
热液循环
纳米技术
化学
有机化学
工程类
人格
五大性格特征
社会心理学
心理学
作者
Takaaki Tomai,Liangyu Tang,Akira Yoko,Yuki Omura,Gimyeong Seong,Tadafumi Adschiri
标识
DOI:10.1021/acs.chemmater.1c02145
摘要
Highly active facet-controlled nanocatalysts deteriorate readily via surface-atom migration during their use. This study develops a method for regenerating a degraded facet-controlled nanoparticle catalyst by reorientation of surface crystalline structure via the dissolution–reprecipitation process using an organic modifier. The supercritical hydrothermal treatment with the carboxylic acid modifier changes the CeO2 nanoparticles morphology to cubic-like over time to expose the (100) facet. This morphological transformation dynamics suggests that the modifier not only stabilizes the (100) facet but also accelerates the dissolution–reprecipitation process, promoting facet modification and catalyst regeneration. The facet-controlled nanocatalyst regeneration is verified experimentally by the recovery of oxygen storage capacity in the CeO2 nanoparticle, which is an indicator of the catalytic activity.
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