Facile synthesis of Fe–Ni bimetallic N-doped carbon framework for efficient electrochemical hydrogen evolution reaction

Zhang, Ziqi; Cong, Linchuan; Yu, Zhuochen; Huang, Weimin

doi:10.1016/j.mtener.2020.100387

Cited by 32 publications

(18 citation statements)

References 37 publications

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“…As previously discussed, HER mechanism in alkaline media proceeds through H 2 O dissociation: OH − is released in solution with adsorbed atomic hydrogen bound at the metal surface (Volmer step), then an electrochemical desorption (Heyrovsky step) or Metal-H ad recombination (Tafel step) takes place. However, the Volmer-Heyrovsky reaction preferentially occurs on both metal bulk and single sites M-N-C catalysts at pH > 7 [78][79][80]. A Tafel slope of 133 and 106 mVdec −1 was obtained for Fe-N-C and Pt/C, respectively.…”

Section: Catalytic Activity Towards Hermentioning

confidence: 95%

Nanostructured Fe-N-C as Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution

et al. 2021

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The development of electrocatalysts for energy conversion and storage devices is of paramount importance to promote sustainable development. Among the different families of materials, catalysts based on transition metals supported on a nitrogen-containing carbon matrix have been found to be effective catalysts toward oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER) with high potential to replace conventional precious metal-based catalysts. In this work, we developed a facile synthesis strategy to obtain a Fe-N-C bifunctional ORR/HER catalysts, involving wet impregnation and pyrolysis steps. Iron (II) acetate and imidazole were used as iron and nitrogen sources, respectively, and functionalized carbon black pearls were used as conductive support. The bifunctional performance of the Fe-N-C catalyst toward ORR and HER was investigated by cyclic voltammetry, rotating ring disk electrode experiments, and electrochemical impedance spectroscopy in alkaline environment. ORR onset potential and half-wave potential were 0.95 V and 0.86 V, respectively, indicating a competitive performance in comparison with the commercial platinum-based catalyst. In addition, Fe-N-C had also a good HER activity, with an overpotential of 478 mV @10 mAcm−2 and Tafel slope of 133 mVdec−1, demonstrating its activity as bifunctional catalyst in energy conversion and storage devices, such as alkaline microbial fuel cell and microbial electrolysis cells.

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Section: Catalytic Activity Towards Hermentioning

confidence: 95%

Nanostructured Fe-N-C as Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution

et al. 2021

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“…To confirm that the fabricated nanostructures are highly active catalysts, a comparison of the overpotential at 10 mA cm –2 with that of the recently reported electrocatalysts is shown in Figure e. ,− For clarity, the comparison of the reports was classified as carbon-based and metal–carbon-based catalysts. From these reports, − the overpotential range for the carbon-based catalysts varies from 490 to 710 mV (at 10 mA cm –2 ), which are higher values than NGODs (411 mV) and NGQDs (361 mV) in the present study.…”

Section: Resultsmentioning

confidence: 87%

“…Electrocatalytic hydrogen evolution performance. (a, b) LSV polarization curves of NGODs-AuNPs in comparison with NGQDs-AuNPs, pristine NGODs, NGQDs, AuNPs, glassy carbon (GC) electrode, and carbon powder in a 0.5 M H 2 SO 4 aqueous solution, and their corresponding (c) Tafel slopes, (d) mass activity (A/g) and overpotential (mV)@10 mV/cm 2 values, and (e) comparison of HER activity (overpotential (V vs RHE) vs current density @10 mA.cm –2 ) with various carbon and metal@carbon-based catalysts. ,− …”

Section: Resultsmentioning

confidence: 99%

Integration of Nitrogen-Doped Graphene Oxide Dots with Au Nanoparticles for Enhanced Electrocatalytic Hydrogen Evolution

Bogireddy

Hachimi

Muñiz

et al. 2021

ACS Appl. Nano Mater.

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Platinum (Pt)-free catalysts play a significant role in renewable energy and water purification. However, their design and synthesis are challenging as they need to satisfy the increasing demands, low cost, and enhanced catalytic performance with high efficiency to effectively replace Pt-based materials. This work reports the enhanced catalytic efficiencies of gold nanoparticles (AuNPs) in the presence of nitrogen-doped graphene oxide dots (NGODs) for hydrogen evolution in a 0.5 M H 2 SO 4 electrolyte with a Tafel slope of 87 mV dec −1 and an overpotential of 145 mV vs RHE at 10 mA cm −2 . In addition, the hybrid structure reveals the complete removal of organic pollutants with higher catalytic efficiencies as compared to Pt, Pd, and Rh hybrid catalysts. DFT calculations demonstrate that the observed high catalytic activity originates from the oxygen-containing groups present on NGODs and AuNPs. This study may open new avenues for developing scalable and economically viable hybrid systems.

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“…Electrochemical impedance spectra (EIS) measurement was performed at open circuit potential with frequencies from 0.1 to 100,000 Hz and an amplitude of 5 mV. [ 23 ] In order to improved reproducibility, all electrochemical experiments were repeated at least three times and the result data were processed using Origin.…”

Section: Methodsmentioning

confidence: 99%

Cerium doped ZIF nanoparticles and hydroxyapatite co‐deposited coating on titanium dioxide nanotubes array exhibiting biocompatibility and antibacterial property

Zhang

Liu

et al. 2021

Nano Select

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Cerium has been used as an implanted alloy additive for many years for it can enhance the mechanical properties of the alloy and restrain the corrosion of the implant. Moreover, cerium oxide nanoparticles are often used as an antibacterial material. However, there were few researches focusing on the antibacterial properties of Ce3+ and Ce4+ ions, instead of their corresponding oxide, as potential antibacterial coatings. Thus in this work, we loaded Ce ions into the porous structure of the ZIF‐8 nanoparticles and co‐deposited them with hydroxyapatite as a composite coating onto anodized titanium dioxide nanotubes array in order to test whether it can improve the anti‐corrosion and antibacterial properties of the materials without affecting the biocompatibility.

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Facile synthesis of Fe–Ni bimetallic N-doped carbon framework for efficient electrochemical hydrogen evolution reaction

Cited by 32 publications

References 37 publications

Nanostructured Fe-N-C as Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution

Nanostructured Fe-N-C as Bifunctional Catalysts for Oxygen Reduction and Hydrogen Evolution

Integration of Nitrogen-Doped Graphene Oxide Dots with Au Nanoparticles for Enhanced Electrocatalytic Hydrogen Evolution

Cerium doped ZIF nanoparticles and hydroxyapatite co‐deposited coating on titanium dioxide nanotubes array exhibiting biocompatibility and antibacterial property

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