TY - JOUR
T1 - Facile Regeneration Strategy for Facet-Controlled Nanocatalysts via the Dissolution-Reprecipitation Process Promoted by an Organic Modifier
AU - Tomai, Takaaki
AU - Tang, Liangyu
AU - Yoko, Akira
AU - Omura, Yuki
AU - Seong, Gimyeong
AU - Adschiri, Tadafumi
N1 - Funding Information:
This study was supported by the grants from the Japan Society for the Promotion of Science (JSPS); KAKENHI (Grant JP16H06367), Japan Science and Technology Agency (JST); MIRAI (Grant JPMJMI17E4); CREST (Grant JPMJCR16P3), Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan; WPI – Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, established by World Premier International Research Center Initiative (WPI); Dynamic Alliance for Open Innovation Bridging Human, Environment and Materials; Materials Processing Science project (“Materealize”) (Grant JPMXP0219192801), and the JGC-S (Nikki–Saneyoshi) Scholarship Foundation. The authors are grateful to Mr. Ryosuke Taniai, Dr. Yusuke Ootani, and Prof. Momoji Kubo at the Institute for Materials Research, Tohoku University, for the support to prepare graphical abstract.
Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/10/12
Y1 - 2021/10/12
N2 - 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.
AB - 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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U2 - 10.1021/acs.chemmater.1c02145
DO - 10.1021/acs.chemmater.1c02145
M3 - Article
AN - SCOPUS:85115916596
SN - 0897-4756
VL - 33
SP - 7780
EP - 7784
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 19
ER -