Nitrogen doped carbon encapsulated hierarchical NiMoN as highly active and durable HER electrode for repeated ON/OFF water electrolysis

Zhang, Rufei; Xu, Lidong; Wu, Zhaohui; Wang, Linan; Zhang, Jinpeng; Tang, Yang; Xie, Ao; Chen, Yongmei; Zhang, Hailong; Wan, Pingyu

doi:10.1016/j.cej.2022.134931

Cited by 23 publications

(14 citation statements)

References 54 publications

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“…The potential is constant during the test period of 100 h (Figure a), and the LSV curves after the test do not shift significantly (Figure b). In general, the intermittent power supply deactivates the activity of electrocatalysts . Therefore, the excellent stability of 3D NiFe HT(urea + NH 4 F) in the intermittent run (Figure c, d) demonstrates that the tested electrode is of potential in water electrolysis by renewable solar and wind electricity.…”

Section: Resultsmentioning

confidence: 93%

“…In general, the intermittent power supply deactivates the activity of electrocatalysts. 54 Therefore, the excellent stability of 3D NiFe HT(urea + NH 4 F) in the intermittent run (Figure 5c, d) demonstrates that the tested electrode is of potential in water electrolysis by renewable solar and wind electricity. The morphology of the electrode after the 100 h stability test is shown in Figure S9, which indicates that the integrity of the electrode structures is maintained during the test.…”

Section: ■ Experimental Sectionmentioning

confidence: 80%

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3D-Printed Hierarchically Micro–Nano-structured NiFe Catalysts for the Stable and Efficient Oxygen Evolution Reaction

Zhou

Tang

Jiao

et al. 2023

ACS Appl. Nano Mater.

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The high overpotential of the oxygen evolution reaction (OER) is the main obstacle to water electrolysis for green hydrogen production. NiFe-based materials are the potential non-precious metal electrocatalysts for the OER, but their poor stability and limited activity have been of concern. Herein, a three-dimensional self-supporting NiFe electrode is prepared by direct writing 3D printing using spherical powders of Ni and Fe metals followed by hydrothermal treatment at 130 °C in urea and NH4F mixed solution. The fabricated 3D micro–nano-structured NiFe electrode presents an excellent OER activity of 220 mV overpotential to reach 100 mA cm–2 with a Tafel slope of 49.1 mV dec–1 and stability up to 100 h in continuous or intermittent power supply. The hydrothermal treatment produces in situ growth of flower-like clusters of NiFe2O4 nanoneedles wrapped with FeOOH nanosheets on the surface of the 3D NiFe bimetal microsphere network, and the outstanding OER activity is attributed to a wide variety of interfaces and heterojunctions among metal microspheres, metal oxides, and hydroxides. This study provides an approach for preparing high-performance self-supporting electrodes for electrochemical processes.

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Section: Resultsmentioning

confidence: 93%

Section: ■ Experimental Sectionmentioning

confidence: 80%

3D-Printed Hierarchically Micro–Nano-structured NiFe Catalysts for the Stable and Efficient Oxygen Evolution Reaction

Zhou

Tang

Jiao

et al. 2023

ACS Appl. Nano Mater.

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“…26 Additionally, the I D /I G ratio of 1.01 indicates that the Co-N-C nanosheets are highly graphitized. [30][31][32] The highly graphitized carbon material as a substrate could improve the conductivity and electrocatalytic activity of the catalyst. Therefore, the highly graphitized Co-N-C nanosheets could promote the electrocatalytic performance and conductivity of RuSe 2 /Co-N-C-5.…”

Section: Resultsmentioning

confidence: 99%

Anchored RuSe₂nanospheres on Co–N–C nanosheets boost electrocatalytic alkaline hydrogen evolution

Shi

Zhan

et al. 2023

CrystEngComm

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“…All the results demonstrated the high activity and excellent stability of the ultra-thin nitrogen-doped carbon-encapsulated NiMoN as the HER electrode, which also had a strong ability to cope with fluctuating and harsh working conditions, demonstrating its great prospect in repeated ON/OFF electrolysis associated with changeful and renewable electric power. 91…”

Section: Nimo-based Her Electrodesmentioning

confidence: 99%

Hydrogen production by traditional and novel alkaline water electrolysis on nickel or iron based electrocatalysts

et al. 2023

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Nitrogen doped carbon encapsulated hierarchical NiMoN as highly active and durable HER electrode for repeated ON/OFF water electrolysis

Cited by 23 publications

References 54 publications

3D-Printed Hierarchically Micro–Nano-structured NiFe Catalysts for the Stable and Efficient Oxygen Evolution Reaction

3D-Printed Hierarchically Micro–Nano-structured NiFe Catalysts for the Stable and Efficient Oxygen Evolution Reaction

Anchored RuSe₂nanospheres on Co–N–C nanosheets boost electrocatalytic alkaline hydrogen evolution

Hydrogen production by traditional and novel alkaline water electrolysis on nickel or iron based electrocatalysts

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Nitrogen doped carbon encapsulated hierarchical NiMoN as highly active and durable HER electrode for repeated ON/OFF water electrolysis

Cited by 23 publications

References 54 publications

3D-Printed Hierarchically Micro–Nano-structured NiFe Catalysts for the Stable and Efficient Oxygen Evolution Reaction

3D-Printed Hierarchically Micro–Nano-structured NiFe Catalysts for the Stable and Efficient Oxygen Evolution Reaction

Anchored RuSe2nanospheres on Co–N–C nanosheets boost electrocatalytic alkaline hydrogen evolution

Hydrogen production by traditional and novel alkaline water electrolysis on nickel or iron based electrocatalysts

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Anchored RuSe₂nanospheres on Co–N–C nanosheets boost electrocatalytic alkaline hydrogen evolution