期刊
ADVANCED MATERIALS
卷 33, 期 35, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202100910
关键词
bismuthene; electrochemical CO; (2) reduction; formate; galvanic replacement reaction; nanosheet arrays
类别
资金
- Ministry of Science and Technology of China [2017YFA0204800]
- National Natural Science Foundation of China [U2002213, 21902114]
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- 111 Project
- Joint International Research Laboratory of Carbon-Based Functional Materials and Devices
In this work, it is demonstrated that the galvanic replacement reaction is an effective method for preparing high-quality bismuthene nanosheet arrays, enabling the growth of small-thickness, large-surface-area bismuthene nanosheets on copper substrates, and achieving efficient CO2 reduction reactions.
There is a lack of straightforward methods to prepare high-quality bismuthene nanosheets, or, even more challengingly, to grow their arrays due to the low melting point and high oxophilicity of bismuth. This synthetic obstacle has hindered their potential applications. In this work, it is demonstrated that the galvanic replacement reaction can do the trick. Under well-controlled conditions, large-area vertically aligned bismuthene nanosheet arrays are grown on Cu substrates of various shapes and sizes. The product features small nanosheet thickness of two to three atomic layers, large surface areas, and abundant porosity between nanosheets. Most remarkably, bismuthene nanosheet arrays grown on Cu foam can enable efficient CO2 reduction to formate with high Faradaic efficiency of >90%, large current density of 50 mA cm(-2), and great stability.
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