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Ji Y, Liu S, Song S, Xing L, Kang T, Zhang B, Li H, Chen W, Li Z, Zhong Z, Xu G, Su F. High-Index Faceted Cu 2 O@CuO Mesocrystals Act as Efficient Catalyst for Si Hydrochlorination to Trichlorosilane. Small 2024; 20:e2305715. [PMID: 37788910 DOI: 10.1002/smll.202305715] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 09/14/2023] [Indexed: 10/05/2023]
Abstract
Mesocrystals (MCs) with high-index facets may have superior catalytic properties to those with low-index facets and their nanocrystal counterparts. However, synthesizing such mesocrystal materials is still very challenging because of the metastability of MCs and energetic high-index crystal facets. This work reports a successful solvothermal method followed by calcination for synthesizing copper oxide-based MCs possessing a core-shell structure (denoted as Cu2 O@CuO HIMCs). Furthermore, these MCs are predominantly bounded by the high-index facets such as {311} or {312} with a high-density of stepped atoms. When used as catalysts in Si hydrochlorination to produce trichlorosilane (TCS, the primary feedstock of high-purity crystalline Si), Cu2 O@CuO HIMCs exhibit significantly enhanced Si conversion and TCS selectivity compared to those with flat surfaces and their nanostructured counterparts. Theoretical calculations reveal that both the core-shell structure and the high-index surface contribute to the increased electron density of Cu sites in Cu2 O@CuO HIMCs, promoting the adsorption and dissociation of HCl and stabilizing the dissociated Cl* intermediate. This work provides a simple method for synthesizing high-index faceted MCs and offers a feasible strategy to enhance the catalytic performance of MCs.
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Affiliation(s)
- Yongjun Ji
- School of Light Industry, Beijing Technology and Business University, Beijing, 100048, China
| | - Shaomian Liu
- School of Chemistry and Chemical Engineering, Hebei Normal University for Nationalities, Chengde, 067000, China
| | - Shaojia Song
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
| | - Liwen Xing
- College of Chemistry and Materials Engineering, Beijing Technology and Business University, Beijing, 100048, China
| | - Ting Kang
- Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Bin Zhang
- Analytical and Testing Center, Chongqing University, Chongqing, 401331, China
| | - Huifang Li
- Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
| | - Wenxing Chen
- Energy & Catalysis Center, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Zhenxing Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
| | - Ziyi Zhong
- Department of Chemical Engineering, Guangdong Technion-Israel Institute of Technology (GTIIT), 241 Daxue Road, Shantou, 515063, China
- Technion-Israel Institute of Technology (IIT), Haifa, 32000, Israel
| | - Guangwen Xu
- Institute of Industrial Chemistry and Energy Technology, Shenyang University of Chemical Technology, Shenyang, 110142, China
| | - Fabing Su
- Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China
- Institute of Industrial Chemistry and Energy Technology, Shenyang University of Chemical Technology, Shenyang, 110142, China
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