Assembly of Copolymer and Metal−Organic Framework HKUST-1 to Form Cu<sub>2−x</sub>S/CNFs Intertwining Network for Efficient Electrocatalytic Hydrogen Evolution
The construction of complex intertwined networks that provide fast transport pathways for ions/electrons is very important for electrochemical systems such as water splitting, but a challenge. Herein, a three dimensional (3-D) intertwined network of Cu<sub>2−x</sub>S/CNFs (x = 0 or 0.04)...
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doaj-5d5c6e602a72417d89edf00e594d0dca2021-06-30T23:30:23ZengMDPI AGNanomaterials2079-49912021-06-01111505150510.3390/nano11061505Assembly of Copolymer and Metal−Organic Framework HKUST-1 to Form Cu<sub>2−x</sub>S/CNFs Intertwining Network for Efficient Electrocatalytic Hydrogen EvolutionYuanjuan Bai0Yanran Li1Gonggang Liu2Jinbo Hu3Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, ChinaState Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, ChinaHunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, ChinaHunan Province Key Laboratory of Materials Surface & Interface Science and Technology, College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, ChinaThe construction of complex intertwined networks that provide fast transport pathways for ions/electrons is very important for electrochemical systems such as water splitting, but a challenge. Herein, a three dimensional (3-D) intertwined network of Cu<sub>2−x</sub>S/CNFs (x = 0 or 0.04) has been synthesized through the morphology-preserved thermal transformation of the intertwined PEG-<i>b</i>-P4VP/ HKUST-1 hybrid networks. The strong interaction between PEG chains and Cu<sup>2+</sup> is the key to the successful assembly of PEG-<i>b</i>-P4VP nanofibers and HKUST-1, which inhibits the HKUST-1 to form individual crystalline particles. The obtained Cu<sub>2−x</sub>S/CNFs composites possess several merits, such as highly exposed active sites, high-speed electronic transmission pathways, open pore structure, etc. Therefore, the 3-D intertwined hierarchical network of Cu<sub>2−x</sub>S/CNFs displays an excellent electrocatalytic activity for HER, with a low overpotential (η) of 276 mV to reach current densities of 10 mA cm<sup>−2</sup>, and a smaller Tafel slope of 59 mV dec<sup>−1</sup> in alkaline solution.https://www.mdpi.com/2079-4991/11/6/1505assemblymetal-organic frameworkshydrogen evolution reactionCu<sub>2−x</sub>S |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yuanjuan Bai Yanran Li Gonggang Liu Jinbo Hu |
spellingShingle |
Yuanjuan Bai Yanran Li Gonggang Liu Jinbo Hu Assembly of Copolymer and Metal−Organic Framework HKUST-1 to Form Cu<sub>2−x</sub>S/CNFs Intertwining Network for Efficient Electrocatalytic Hydrogen Evolution Nanomaterials assembly metal-organic frameworks hydrogen evolution reaction Cu<sub>2−x</sub>S |
author_facet |
Yuanjuan Bai Yanran Li Gonggang Liu Jinbo Hu |
author_sort |
Yuanjuan Bai |
title |
Assembly of Copolymer and Metal−Organic Framework HKUST-1 to Form Cu<sub>2−x</sub>S/CNFs Intertwining Network for Efficient Electrocatalytic Hydrogen Evolution |
title_short |
Assembly of Copolymer and Metal−Organic Framework HKUST-1 to Form Cu<sub>2−x</sub>S/CNFs Intertwining Network for Efficient Electrocatalytic Hydrogen Evolution |
title_full |
Assembly of Copolymer and Metal−Organic Framework HKUST-1 to Form Cu<sub>2−x</sub>S/CNFs Intertwining Network for Efficient Electrocatalytic Hydrogen Evolution |
title_fullStr |
Assembly of Copolymer and Metal−Organic Framework HKUST-1 to Form Cu<sub>2−x</sub>S/CNFs Intertwining Network for Efficient Electrocatalytic Hydrogen Evolution |
title_full_unstemmed |
Assembly of Copolymer and Metal−Organic Framework HKUST-1 to Form Cu<sub>2−x</sub>S/CNFs Intertwining Network for Efficient Electrocatalytic Hydrogen Evolution |
title_sort |
assembly of copolymer and metal−organic framework hkust-1 to form cu<sub>2−x</sub>s/cnfs intertwining network for efficient electrocatalytic hydrogen evolution |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2021-06-01 |
description |
The construction of complex intertwined networks that provide fast transport pathways for ions/electrons is very important for electrochemical systems such as water splitting, but a challenge. Herein, a three dimensional (3-D) intertwined network of Cu<sub>2−x</sub>S/CNFs (x = 0 or 0.04) has been synthesized through the morphology-preserved thermal transformation of the intertwined PEG-<i>b</i>-P4VP/ HKUST-1 hybrid networks. The strong interaction between PEG chains and Cu<sup>2+</sup> is the key to the successful assembly of PEG-<i>b</i>-P4VP nanofibers and HKUST-1, which inhibits the HKUST-1 to form individual crystalline particles. The obtained Cu<sub>2−x</sub>S/CNFs composites possess several merits, such as highly exposed active sites, high-speed electronic transmission pathways, open pore structure, etc. Therefore, the 3-D intertwined hierarchical network of Cu<sub>2−x</sub>S/CNFs displays an excellent electrocatalytic activity for HER, with a low overpotential (η) of 276 mV to reach current densities of 10 mA cm<sup>−2</sup>, and a smaller Tafel slope of 59 mV dec<sup>−1</sup> in alkaline solution. |
topic |
assembly metal-organic frameworks hydrogen evolution reaction Cu<sub>2−x</sub>S |
url |
https://www.mdpi.com/2079-4991/11/6/1505 |
work_keys_str_mv |
AT yuanjuanbai assemblyofcopolymerandmetalorganicframeworkhkust1toformcusub2xsubscnfsintertwiningnetworkforefficientelectrocatalytichydrogenevolution AT yanranli assemblyofcopolymerandmetalorganicframeworkhkust1toformcusub2xsubscnfsintertwiningnetworkforefficientelectrocatalytichydrogenevolution AT gonggangliu assemblyofcopolymerandmetalorganicframeworkhkust1toformcusub2xsubscnfsintertwiningnetworkforefficientelectrocatalytichydrogenevolution AT jinbohu assemblyofcopolymerandmetalorganicframeworkhkust1toformcusub2xsubscnfsintertwiningnetworkforefficientelectrocatalytichydrogenevolution |
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1721351105498054656 |