Details

Autor(en) / Beteiligte

• Sun, Mengmeng
• Fu, Qiang
• Gao, Lijun
• Zheng, Yanping
• Li, Yangyang
• Chen, Mingshu
• Bao, Xinhe

Titel

Catalysis under shell： Improved CO oxidation reaction confined in Pt@h-BN core-shell nanoreactors

Ist Teil von

• Nano research, 2017-04, Vol.10 (4), p.1403-1412

Ort / Verlag

Beijing: Tsinghua University Press

Erscheinungsjahr

2017

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Core-shell nanostructures consisting of active metal cores and protective shells often exhibit enhanced catalytic performance, in which reactants can access a small part of the core surfaces through the pores in the shells. In this study, we show that Pt nanoparticles （NPs） can be embedded into few-layer hexagonal boron nitride （h-BN） overlayers, forming Pt@h-BN core-shell nanocatalysts. The h-BN shells not only protect the Pt NPs under harsh conditions but also allow gaseous molecules such as CO and 02 to access a large part of the Pt surfaces through a facile intercalation process. As a result, the Pt@h-BN nanostructures act as nanoreactors, and CO oxidation reactions with improved activity, selectivity, and stability occur at the core-shell interfaces. The confinement effect exerted by the h-BN shells promotes the Pt-catalyzed reactions. Our work suggests that two-dimensional shells can function as robust but flexible covers on nanocatalyst surfaces and tune the surface reactivity.