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  Bifunctional heterostructure assembly of NiFe LDH nanosheets on NiCoP nanowires for highly efficient and stable overall water splitting

Zhang, H., Li, X., Hähnel, A., Naumann, V., Lin, C., Azimi, S., et al. (2018). Bifunctional heterostructure assembly of NiFe LDH nanosheets on NiCoP nanowires for highly efficient and stable overall water splitting. Advanced Functional Materials, 28(14): 1706847. doi:10.1002/adfm.201706847.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0009-1442-6 Version Permalink: https://hdl.handle.net/21.11116/0000-0009-4EC5-2
Genre: Journal Article

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 Creators:
Zhang, Haojie1, Author
Li, Xiaopeng1, Author
Hähnel, Angelika1, Author
Naumann, Volker1, Author
Lin, Chao1, Author
Azimi, Sara2, Author
Schweizer, Stefan L.1, Author
Maijenburg, A. Wouter1, Author
Wehrspohn, Ralf B.1, Author
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1External Organizations, ou_persistent22              
2Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society, Weinberg 2, 06120 Halle, DE, ou_3287476              

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 Abstract: 3D hierarchical heterostructure NiFe LDH@NiCoP/NF electrodes are prepared successfully on nickel foam with special interface engineering and synergistic effects. This research finds that the as-prepared NiFe LDH@NiCoP/NF electrodes have a more sophisticated inner structure and intensive interface than a simple physical mixture. The NiFe LDH@NiCoP/NF electrodes require an overpotential as low as 120 and 220 mV to deliver 10 mA cm-2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in 1 m KOH, respectively. Tafel and electrochemical impedance spectroscopy further reveal a favorable kinetic during electrolysis. Specifically, the NiFe LDH@NiCoP/NF electrodes are simultaneously used as cathode and anode for overall water splitting, which requires a cell voltage of 1.57 V at 10 mA cm-2. Furthermore, the synergistic effect of the heterostructure improves the structural stability and promotes the generation of active phases during HER and OER, resulting in excellent stability over 100 h of continuous operation. Moreover, the strategy and interface engineering of the introduced heterostructure can also be used to prepare other bifunctional and cost-efficient electrocatalysts for various applications.

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 Dates: 2018-01-312018-04-05
 Publication Status: Issued
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 Identifiers: BibTex Citekey: P13688
DOI: 10.1002/adfm.201706847
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Title: Advanced Functional Materials
  Abbreviation : Adv. Funct. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH Verlag GmbH
Pages: - Volume / Issue: 28 (14) Sequence Number: 1706847 Start / End Page: - Identifier: ISSN: 1616-301X
CoNE: https://pure.mpg.de/cone/journals/resource/954925596563