Citation: Wei Guijuan, Du Kun, Zhao Xixia, Wang Jiayang, Yan Wenxiu, An Chao, An Changhua. Cable-like carbon nanotubes decorated metal-organic framework derived ultrathin CoSe₂/CNTs nanosheets for electrocatalytic overall water splitting[J]. Chinese Chemical Letters, ;2020, 31(10): 2641-2644. doi: 10.1016/j.cclet.2020.02.029 shu

Cable-like carbon nanotubes decorated metal-organic framework derived ultrathin CoSe₂/CNTs nanosheets for electrocatalytic overall water splitting

Wei Guijuan ^a,1 ,
Du Kun ^b,1 ,
Zhao Xixia ^a ,
Wang Jiayang ^b ,
Yan Wenxiu ^b ,
An Chao ^b ,
An Changhua ^b,*,

a.
State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
b.
Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China

anch@tjut.edu.cn

Received Date: 14 January 2020
Revised Date: 4 February 2020
Accepted Date: 14 February 2020
Available Online: 15 February 2020

Figures(4)

The high cost and low reserves of noble metals greatly hinder their practical applications in new energy production and conversion. The exploration of cost-effective alternative electrocatalysts with the ability to drive hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is extremely significant to promote overall water splitting. Herein, ultrathin CoSe₂/CNTs nanocomposites have been synthesized by a facile two-step method, where the ultrathin Co-MOF (metal organic-framework) decorated with cable-like carbon nanotubes (CNTs) (Co-MOF/CNTs) was initially fabricated, and followed a low-temperature selenization process. The ultrathin CoSe₂ nanosheets as well as the superior conductivity of CNTs synergistically resulted in abundant active sites and enhanced conductivity to boost the electrocatalytic activity. The as-prepared CoSe₂/CNTs electrocatalysts exhibited an overpotential of 190 mV and 300 mV vs. reversible hydrogen electrode (RHE) at a current density of 10 mA/cm² for the HER and OER in alkaline solution, respectively, and demonstrated superior durability. Furthermore, the as-prepared bifunctional CoSe₂/CNTs electrocatalysts can act as cathode and anode in an electrolyzer, showing a cell voltage of 1.75 V at 10 mA/cm² for overall water splitting.
- CoSe₂,
- Carbon nanotubes,
- Ultrathin,
- Bifunctional electrocatalyst,
- Water splitting
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Cable-like carbon nanotubes decorated metal-organic framework derived ultrathin CoSe2/CNTs nanosheets for electrocatalytic overall water splitting

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通讯作者: 陈斌, bchen63@163.com

Cable-like carbon nanotubes decorated metal-organic framework derived ultrathin CoSe₂/CNTs nanosheets for electrocatalytic overall water splitting