Details

Autor(en) / Beteiligte

• Li, Jiaxin
• Bao, Tong
• Zhang, Chaoqi
• Song, Hao
• Zou, Yingying
• Yuan, Ling
• Xi, Yamin
• Yu, Chengzhong
• Liu, Chao

Titel

A general strategy for direct growth of yolk-shell MOF-on-MOF hybrids

Ist Teil von

• Chemical engineering journal (Lausanne, Switzerland : 1996), 2023-09, Vol.472, p.144926, Article 144926

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •An interfacial growth-reorganization strategy is developed.•General synthesis of yolk-shell MOF-on-MOF hybrids is achieved.•MOF derived carbon materials with bridged yolk-shell architecture is prepared.•Enhanced oxygen reduction reaction performance is achieved. Construction of metal–organic framework (MOF) hybrids with yolk-shell nanostructures via MOF-on-MOF growth is significant for MOF design toward elaborate properties and enhanced performances, while remains challenging. Here, we report the direct growth of yolk-shell MOF-on-MOF hybrids via an interfacial growth-reorganization strategy. The synthesis relies on the precise growth of guest CoZn-ZIF (ZIF = zeolite imidazole framework) with appropriate crystal diameter and arrangement on host MOFs, inducing an in-situ transformation of core–shell intermediate into yolk-shell product. This strategy can be generally applied to the growth of CoZn-ZIF onto various host MOFs with different shapes, crystal structures and compositions including rod-like and octahedral Fe-based NH2-MIL-88B (MIL = Material Institute Lavoisier) and cake-like Ti-based NH2-MIL-125 toward three kinds of yolk-shell MOF-on-MOF hybrids. Moreover, functional carbon materials with bridged yolk-shell architecture can be prepared by pyrolysis of MOF-on-MOF hybrids as precursors, exhibiting enhanced oxygen reduction reaction performance than their monomeric counterparts. Our work paves the way for the design and application of MOF based yolk-shell nanostructures.