| Autor: |
Hele Guo, Yali Liu, Hongliang Dong, Wei Zong, Kaibin Chu, Weiwei Li, Zhongli Fan, Guanjie He, Yue-E Miao, Ivan P. Parkin, Feili Lai, Tianxi Liu |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Science Bulletin. 67:2428-2437 |
| ISSN: |
2095-9273 |
| DOI: |
10.1016/j.scib.2022.11.010 |
| Popis: |
The creation of ultrafine alloy nanoparticles (5 nm) that can maintain surface activity and avoid aggregation for heterogeneous catalysis has received much attention and is extremely challenging. Here, ultrafine PtRh alloy nanoparticles imprisoned by the cavities of reduced chiral covalent imine cage (PtRh@RCC3) are prepared successfully by an organic molecular cage (OMC) confinement strategy, while the soluble RCC3 can act as a homogenizer to homogenize the heterogeneous PtRh alloy in solution. Moreover, the X-ray absorption near-edge structure (XANES) results show that the RCC3 can act as an electron-acceptor to withdraw electrons from Pt, leading to the formation of higher valence Pt atoms, which is beneficial to improving the catalytic activity for the reduction of 4-nitrophenol. Attributed to the synergistic effect of Pt/Rh atoms and the unique function of the RCC3, the reaction rate constants of Pt |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect