Interface-coupling of CoFe-LDH on MXene as high-performance oxygen evolution catalyst. (June 2019)
- Record Type:
- Journal Article
- Title:
- Interface-coupling of CoFe-LDH on MXene as high-performance oxygen evolution catalyst. (June 2019)
- Main Title:
- Interface-coupling of CoFe-LDH on MXene as high-performance oxygen evolution catalyst
- Authors:
- Hao, Chongyan
Wu, Yang
An, Yajing
Cui, Baihua
Lin, Jiannan
Li, Xiaoning
Wang, Dianhui
Jiang, Minhong
Cheng, Zhenxiang
Hu, Shi - Abstract:
- Abstract: Oxygen evolution reaction (OER) is the bottleneck reaction of the overall water splitting process despite the intensive research in the past decades. Efficient yet stable low-cost OER catalysts have been widely explored but further improvement is still highly demanded. Herein, a type of hybrid OER catalyst was prepared by the growth of CoFe-LDH (layered double hydroxide) on the surface of Ti3 C2 MXene nanosheets, which exhibits superior OER performance than the state-of-the-art RuO2 . The enhancement of the OER performance could be attributed to the combination of oxygen-breaking ability of CoFe-LDH and metallic conductivity of Ti3 C2 MXene substrate. Meanwhile, the direct growth of CoFe-LDH on the hydroxyl-rich surface of MXene effectively prevents itself from aggregation, exposing more CoFe-LDH edge active sites. What's more important is that the intimate interface between CoFe-LDH and Ti3 C2 MXene brings in efficient charge transfer and oxygen activation, which is supported by the DFT calculation results. The direct growth of CoFe-LDH on MXene endows the insulating LDH with metallic features with the O 2p states become distributed above the Fermi level which is mediated by the possible anionic redox process. This work demonstrates the great potential of MXene-based hybrid nanostructure for energy conversion applications. Graphical abstract: Image 1 Highlights: Nanohybrid electrocatalyst of Ti3 C2 -MXene and CoFe-LDH is fabricated and characterized. EnhancedAbstract: Oxygen evolution reaction (OER) is the bottleneck reaction of the overall water splitting process despite the intensive research in the past decades. Efficient yet stable low-cost OER catalysts have been widely explored but further improvement is still highly demanded. Herein, a type of hybrid OER catalyst was prepared by the growth of CoFe-LDH (layered double hydroxide) on the surface of Ti3 C2 MXene nanosheets, which exhibits superior OER performance than the state-of-the-art RuO2 . The enhancement of the OER performance could be attributed to the combination of oxygen-breaking ability of CoFe-LDH and metallic conductivity of Ti3 C2 MXene substrate. Meanwhile, the direct growth of CoFe-LDH on the hydroxyl-rich surface of MXene effectively prevents itself from aggregation, exposing more CoFe-LDH edge active sites. What's more important is that the intimate interface between CoFe-LDH and Ti3 C2 MXene brings in efficient charge transfer and oxygen activation, which is supported by the DFT calculation results. The direct growth of CoFe-LDH on MXene endows the insulating LDH with metallic features with the O 2p states become distributed above the Fermi level which is mediated by the possible anionic redox process. This work demonstrates the great potential of MXene-based hybrid nanostructure for energy conversion applications. Graphical abstract: Image 1 Highlights: Nanohybrid electrocatalyst of Ti3 C2 -MXene and CoFe-LDH is fabricated and characterized. Enhanced oxygen evolution performance is demonstrated in the LDH-MXene nanohybrid. Spectroscopy and DFT calculation are combined to understand the interfacial charge transfer and performance boost. … (more)
- Is Part Of:
- Materials today energy. Volume 12(2019)
- Journal:
- Materials today energy
- Issue:
- Volume 12(2019)
- Issue Display:
- Volume 12, Issue 2019 (2019)
- Year:
- 2019
- Volume:
- 12
- Issue:
- 2019
- Issue Sort Value:
- 2019-0012-2019-0000
- Page Start:
- 453
- Page End:
- 462
- Publication Date:
- 2019-06
- Subjects:
- Oxygen evolution reaction -- MXene -- LDH -- Electrocatalysis
Energy development -- Periodicals
Energy industries -- Periodicals
Power resources -- Periodicals
Energy policy -- Periodicals
Energy development
Energy industries
Energy policy
Power resources
Electronic journals
Periodicals
621.042 - Journal URLs:
- http://www.sciencedirect.com/science/journal/24686069 ↗
http://www.sciencedirect.com/ ↗ - DOI:
- 10.1016/j.mtener.2019.04.009 ↗
- Languages:
- English
- ISSNs:
- 2468-6069
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - BLDSS-3PM
British Library HMNTS - ELD Digital store - Ingest File:
- 10696.xml