Soccer Ball‐like Assembly of Edge‐to‐edge Oriented 2D‐silica Nanosheets: A Promising Catalyst Support for High‐Temperature Reforming

Author:

Jang Sun Woo1,Kumari Nitee1,Nam Eonu2,Lee Yun Kyung3ORCID,Cha Yunmi3,An Kwangjin2,Lee In Su14

Affiliation:

1. Center for Nanospace-confined Chemical Reactions (NCCR) Pohang University of Science and Technology (POSTECH) Pohang 37673 South Korea

2. Department of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 South Korea

3. Park Systems KANC 15F Gwanggyo-ro 109 Suwon 16229 South Korea

4. Institute for Convergence Research and Education in Advanced Technology (I-CREATE) Yonsei University Seoul 03722 South Korea

Abstract

AbstractControlled assembly of nanoparticles into well‐defined assembled architectures through precise manipulation of spatial arrangement and interactions allows the development of advanced mesoscale materials with tailored structures, hierarchical functionalities, and enhanced properties. Despite remarkable advancements, the controlled assembly of highly anisotropic 2Dnanosheets is significantly challenging, primarily due to the limited availability of selective edge‐to‐edge connectivity compared to the abundant large faces. Innovative strategies are needed to unlock the full potential of 2D‐nanomaterialsin self‐assembled structures with distinct and desirable properties. This research unveils the discovery of controlled self‐assembly of 2D‐silica nanosheets (2D‐SiNSs) into hollow micron‐sized soccer ball‐like shells (SA‐SiMS). The assembly is driven by the physical flexibility of the 2D‐SiNSs and the differential electricdouble‐layer charge gradient creating electrostatic bias on the edge and face regions. The resulting SA‐SiMS structures exhibit high mechanical stability, even at high‐temperatures, and exhibit excellent performance as catalyst support in the dry reforming of methane. The SA‐SiMS structures facilitate improved mass transport, leading to enhanced reaction rates, while the thin silica shell prevents sintering of small catalyst nanocrystals, thereby preventing coke formation. This discovery sheds light on the controllable self‐assembly of 2D nanomaterials and provides insights into the design and synthesis of advanced mesoscale materials with tailored properties.

Funder

Ministry of Science, ICT and Future Planning

Publisher

Wiley

Subject

General Chemistry,Catalysis

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