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Crystal-Phase-Selective Etching of Heterophase Au Nanostructures

文献类型：期刊论文

作者Saleem, Faisal2,3,4,5; Liu, Guangyao2; Liu, Guigao2,6; Chen, Bo2,7,8; Yun, Qinbai2; Ge, Yiyao2; Zhang, An2; Wang, Xixi2; Zhou, Xichen2; Wang, Gang1
刊名SMALL METHODS
出版日期2024-07-06
关键词Au nanostructures crystal phase engineering heterophase selective etching
ISSN号2366-9608
DOI10.1002/smtd.202400430
通讯作者Zhang, Hua(hua.zhang@cityu.edu.hk)
英文摘要Selective oxidative etching is one of the most effective ways to prepare hollow nanostructures and nanocrystals with specific exposed facets. The mechanism of selective etching in noble metal nanostructures mainly relies on the different reactivity of metal components and the distinct surface energy of multimetallic nanostructures. Recently, phase engineering of nanomaterials (PEN) offers new opportunities for the preparation of unique heterostructures, including heterophase nanostructures. However, the synthesis of hollow multimetallic nanostructures based on crystal-phase-selective etching has been rarely studied. Here, a crystal-phase-selective etching method is reported to selectively etch the unconventional 4H and 2H phases in the heterophase Au nanostructures. Due to the coating of Pt-based alloy and the crystal-phase-selective etching of 4H-Au in 4H/face-centered cubic (fcc) Au nanowires, the well-defined ladder-like Au@PtAg nanoframes are prepared. In addition, the 2H-Au in the fcc-2H-fcc Au nanorods and 2H/fcc Au nanosheets can also be selectively etched using the same method. As a proof-of-concept application, the ladder-like Au@PtAg nanoframes are used for the electrocatalytic hydrogen evolution reaction (HER) in acidic media, showing excellent performance that is comparable to the commercial Pt/C catalyst. Unconventional-phase 4H-Au and 2H-Au in heterophase Au nanostructures are selectively etched. The PtAg alloy coating and crystal-phase-selective etching of 4H-Au in the 4H/fcc Au nanowires produce well-defined ladder-like Au@PtAg nanoframes. This method can also be used to etch 2H-Au in the fcc-2H-fcc Au nanorods and 2H/fcc Au nanosheets, highlighting the importance of crystal phase in the etching of Au nanomaterials. image
WOS关键词METAL NANOCRYSTALS ; NANOCAGES ; GROWTH ; NANOFRAMES ; FACETS
资助项目Research Grants Council of Hong Kong (GRF)[11301721] ; Research Grants Council of Hong Kong (GRF)[AoE/P-701/20] ; Hong Kong Branch of the National Precious Metals Material Engineering Research Center (NPMM) ; City University of Hong Kong[1886921] ; City University of Hong Kong[9678272] ; City University of Hong Kong[9610663] ; City University of Hong Kong[9380100] ; Hong Kong Scholars Program[XJ2019008]
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science
语种英语
WOS记录号WOS:001263131300001
出版者WILEY-V C H VERLAG GMBH
资助机构Research Grants Council of Hong Kong (GRF) ; Hong Kong Branch of the National Precious Metals Material Engineering Research Center (NPMM) ; City University of Hong Kong ; Hong Kong Scholars Program
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/136905]  
专题中国科学院合肥物质科学研究院
通讯作者Zhang, Hua
作者单位1.Chinese Univ Hong Kong, Dept Chem, Hong Kong, Peoples R China
2.City Univ Hong Kong, Dept Chem, Hong Kong, Peoples R China
3.Nanjing Tech Univ, Key Lab Flexible Elect KLOFE, Nanjing 211816, Peoples R China
4.Nanjing Tech Univ, Inst Adv Mat IAM, Nanjing 211816, Peoples R China
5.Nanjing Tech Univ, Sch Flexible Elect Future Technol, Nanjing 211816, Peoples R China
6.Nanjing Univ Sci & Technol, Natl Special Superfine Powder Engn Res Ctr, Sch Chem & Chem Engn, Nanjing 210094, Peoples R China
7.Nanjing Univ Posts & Telecommun, Inst Adv Mat, State Key Lab Organ Elect & Informat Displays, Nanjing 210023, Peoples R China
8.Nanjing Univ Posts & Telecommun, Inst Adv Mat, Jiangsu Key Lab Biosensors, Nanjing 210023, Peoples R China
9.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, Anhui Key Lab Nanomat & Nanotechnol, Hefei 230031, Peoples R China
10.City Univ Hong Kong, Hong Kong Inst Clean Energy, Hong Kong, Peoples R China
推荐引用方式
GB/T 7714		 Saleem, Faisal,Liu, Guangyao,Liu, Guigao,et al. Crystal-Phase-Selective Etching of Heterophase Au Nanostructures[J]. SMALL METHODS,2024.
APA Saleem, Faisal.,Liu, Guangyao.,Liu, Guigao.,Chen, Bo.,Yun, Qinbai.,...&Zhang, Hua.(2024).Crystal-Phase-Selective Etching of Heterophase Au Nanostructures.SMALL METHODS.
MLA Saleem, Faisal,et al."Crystal-Phase-Selective Etching of Heterophase Au Nanostructures".SMALL METHODS (2024).

入库方式： OAI收割

来源：合肥物质科学研究院

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