Kinetic control of CeO_2 nanoparticles for catalytic CO oxidation

Han Bingqi; Li Huixia; Li Liping; Wang Yan; Zhang Yuelan; Li Guangshe

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Kinetic control of CeO_2 nanoparticles for catalytic CO oxidation

机译：CeO_2纳米粒子催化CO氧化的动力学控制

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This article reports on the growth kinetics of cerium oxide (CeO2) nanoparticles prepared via a sintering method. By varying the sintering temperatures and periods of time, particle size of CeO2 nanoparticles was tuned from 11 to 100 nm. Ostwald ripening mechanism prevails in the growth process, and the growth kinetics is determined to follow an equation, D-5 = 16.2(5) + 3.6 x 10(20) exp(-344.20/RT) in the temperature range of 700 to 1000 degrees C. After dispersing Pt on CeO2 nanoparticles, the size effect for the catalytic performance of the CO oxidation reaction was researched. When temperature and period of time are set at 700 degrees C and 2 h, respectively, dispersion of Pt onto CeO2 nanoparticles led to the largest quantity of chemisorbed oxygen species on the surface and the best catalytic performance. The findings reported here would provide a feasible path for the preparation of advanced catalysts in the future and moreover to discover novel size-dependent supports for many catalytic applications.

机译：本文报道了通过烧结法制备的氧化铈（CeO2）纳米颗粒的生长动力学。通过改变烧结温度和时间，可以将CeO2纳米粒子的粒径从11调整到100 nm。在生长过程中普遍存在奥斯特瓦尔德（Ostwald）成熟机制，并且确定生长动力学遵循方程式，在700至1000的温度范围内D-5 = 16.2（5）+ 3.6 x 10（20）exp（-344.20 / RT）将Pt分散在CeO2纳米颗粒上后，研究了尺寸效应对CO氧化反应催化性能的影响。当温度和时间分别设置为700摄氏度和2小时时，Pt分散在CeO2纳米粒子上会导致表面化学吸附的氧种类最多，催化性能最佳。本文报道的发现将为将来高级催化剂的制备提供可行的途径，并且为许多催化应用发现新颖的尺寸依赖性载体。

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来源
《Journal of Materials Research》 |2019年第13期|2201-2208|共8页
作者
Han Bingqi; Li Huixia; Li Liping; Wang Yan; Zhang Yuelan; Li Guangshe;
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作者单位

Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China;

Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China;

Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China;

Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China;

Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China;

Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
Ce; nanoscale; grain size;

机译：铈;纳米级;粒度;

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1. Kinetic control of CeO_2 nanoparticles for catalytic CO oxidation [J] . Han Bingqi, Li Huixia, Li Liping, Journal of Materials Research . 2019,第13期

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Kinetic control of CeO_2 nanoparticles for catalytic CO oxidation

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