@article{Zhou2025, 
author = {Yinkang Zhou and Aixian Shan and Hao Li and Zhitao Zhao and Piao Xia and Yingying Xu and Bo Yuan and Rongming Wang},
title = {Amorphous encapsulation engineering to overcome SMSI constraints in Pt@a-Nb2O5 catalysts for CO oxidation},
year = {2025},
journal = {Nano Research},
volume = {18},
number = {12},
pages = {94907850},
keywords = {oxygen vacancy, CO oxidation, strong metal–support interaction, amorphous encapsulation, Nb2O5-supported Pt catalysts},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907850},
doi = {10.26599/NR.2025.94907850},
abstract = {In supported catalysts, strong metal–support interaction (SMSI) is pivotal for modulating catalytic performance. Challenges, such as active site shielding and insufficient interfacial reactivity, have emerged as key points of attention. Here, we propose an amorphous encapsulation strategy creating permeable overlayers that preserve metal accessibility while maximizing metal–support interfaces. The engineered Pt@a-Nb2O5 catalyst is synthesized through a two-step process involving the heat treatment of the Nb2O5 support followed by wet chemical reduction. This catalyst exhibits exceptional CO oxidation performance, achieving complete CO conversion at 165 °C and demonstrating remarkable stability for over 30 h at 205 °C. The amorphous Nb2O5 shell, rich in oxygen vacancies, modulates the electronic structure of Pt, creating dual adsorption sites for CO and O2 and significantly improving catalytic activity. The catalyst design, which features an amorphous-coated heterostructure, along with the amorphous encapsulation preparation method, is expected to be applicable to a wider variety of supported catalyst systems and catalytic reactions.}
}