标题: Electrochemical Growth of High-Strength Carbon Nanocoils in Molten Carbonates

作者: Yu, R (Yu, Rui); Xiang, JX (Xiang, Junxiang); Du, KF (Du, Kaifa); Deng, BW (Deng, Bowen); Chen, D (Chen, Di); Yin, HY (Yin, Huayi); Liu, Z (Liu, Ze); Wang, DH (Wang, Dihua)

来源出版物: NANO LETTERS DOI: 10.1021/acs.nanolett.1c03284提前访问日期: DEC 2021

摘要: The reported mechanical strength of carbon nanocoils (CNCs) obtained from traditional preparation of catalytic acetylene pyrolysis is far below its theoretical value. Herein, we report a molten salt electrolysis method that employs CO32- as feedstock to grow CNCs without using metal catalyst. We meticulously mediate the alkalinity of molten carbonate to tune the electrochemical reduction of CO32- on graphite electrode to selectively grow CNCs in Li2CO3-Na2CO3-K2CO3-0.001 wt %Li2O. Graphite substrate, current density, and alkalinity of molten salt dictate the growth of CNCs. In addition, the electrolytic CNCs shows a spring constant of 1.92-39.41 N/m and a shear modulus of 21-547 GPa, which are 10-200 times that of CNCs obtained from catalyst-assisted gas-to-solid conversions. Overall, this paper opens up an electrochemical way to prepare CNCs through liquid-to-solid conversion without using catalysts and acetylene, providing new perspectives on green synthesis of 1D carbon nanomaterials with high mechanical strength.

作者关键词: carbon nanocoils; alkalinity; molten carbonate; electrolysis; mechanical properties

地址: [Yu, Rui; Du, Kaifa; Deng, Bowen; Chen, Di; Yin, Huayi; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

[Xiang, Junxiang; Liu, Ze] Wuhan Univ, Sch Civil Engn, Dept Engn Mech, Wuhan 430072, Peoples R China.

通讯作者地址: Yin, HY; Wang, DH (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China.

Liu, Z (通讯作者)，Wuhan Univ, Sch Civil Engn, Dept Engn Mech, Wuhan 430072, Peoples R China.

电子邮件地址: yinhuayi@whu.edu.cn; ze.liu@whu.edu.cn;wangdh@whu.edu.cn

影响因子：11.189