期刊
ADVANCED FUNCTIONAL MATERIALS
卷 32, 期 38, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202202675
关键词
Pt-rare earth nanoalloys; surface-confined preparations; ultrafine particles
类别
资金
- National Natural Science Foundation of China [22072153, 22102185]
- Chinese Academy of Sciences
- Fundamental Research Funds for the Central Universities [E1E40310]
This study presents a surface-confined strategy for preparing ultrafine Pt-rare earth nanoalloys on N-functionalized supports. By coordinating surface N-metal, the metal cations are atomically dispersed on the support, facilitating uniform nucleation and growth of particles. Moreover, the moderate metal transfer barrier from N ensures confined particle growth, resulting in the formation of ultrafine nanoalloys.
It is extremely challenging to controllably synthesize rare earth-containing nanoalloys due to the ultralow standard reduction potential of rare earth metals. Here, a surface-confined strategy to prepare ultrafine Pt-rare earth nanoalloys on a series of N-functionalized supports is reported. It proves that by surface N-metal coordination, the metal cations of precursors are atomically dispersed on support, which greatly favors uniform nucleation and growth of particles upon reduction. Moreover, the moderate metal transfer barrier from N ensures particle growth in a confined region to form ultrafine nanoalloys. Using this method, ultrafine Pt-La, Pt-Y, and Pt-Dy nanoalloys are prepared on N-functionalized supports such as carbon, zeolite, and Al2O3. Notably, the Pt-La nanoalloys on N-functionalized zeolite show superior activity and durability for propane oxidation. The strategy is expected to provide guidelines for preparing highly efficient rare earth-containing nanoalloys for catalysis applications.
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