Highly efficient hydrogen evolution reaction of Co3O4 supports on N-doped carbon nanotubes in an alkaline solution

Jiang, Jibo; Cong, Haishan; Tang, Jiabin; Sun, Yaoxin; Hu, Xiaomin; Wang, Lulu; Han, Sheng; Lin, Hualin

doi:10.1007/s11581-019-03435-1

Cited by 17 publications

(17 citation statements)

References 48 publications

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“…From the Tafel plot, FCCD25 has a smaller Tafel slope compared to FC due to the presence of CD, which indicates a faster charge transfer in the electrocatalytic process, as illustrated in Scheme S1. In addition, Table S2 shows the comparison of HER and OER performance between FCCD25 and previously reported materials [73][74][75][76][77][78][79][80][81][82]. Compared to HER active catalysts, FCCD25 showed a significantly lower overpotential.…”

Section: Resultsmentioning

confidence: 99%

Construction of FeCo2O4@N-Doped Carbon Dots Nanoflowers as Binder Free Electrode for Reduction and Oxidation of Water

et al. 2020

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Electrochemical water splitting is known as a potential approach for sustainable energy conversion; it produces H2 fuel by utilizing transition metal-based catalysts. We report a facile synthesis of FeCo2O4@carbon dots (CDs) nanoflowers supported on nickel foam through a hydrothermal technique in the absence of organic solvents and an inert environment. The synthesized material with a judicious choice of CDs shows superior performance in hydrogen and oxygen evolution reactions (HER and OER) compared to the FeCo2O4 electrode alone in alkaline media. For HER, the overpotential of 205 mV was able to produce current densities of up to 10 mA cm−2, whereas an overpotential of 393 mV was needed to obtain a current density of up to 50 mA cm−2 for OER. The synergistic effect between CDs and FeCo2O4 accounts for the excellent electrocatalytic activity, since CDs offer exposed active sites and subsequently promote the electrochemical reaction by enhancing the electron transfer processes. Hence, this procedure offers an effective approach for constructing metal oxide-integrated CDs as a catalytic support system to improve the performance of electrochemical water splitting.

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Section: Resultsmentioning

confidence: 99%

Construction of FeCo2O4@N-Doped Carbon Dots Nanoflowers as Binder Free Electrode for Reduction and Oxidation of Water

et al. 2020

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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%

“…Methanol tolerance was investigated by LSV in O 2 -saturated electrolyte, before and after addition of increasing aliquots of methanol to the electrolyte solution to achieve the following concentrations: 0.01, 0.05, 0.1, 1, and 2 M. LSV curves were acquired at a scan rate of 5 mVs −1 and a rotation speed of 1600 rpm with a poisoning time of 5 min after the alcohol addiction [71]. The SCN − poisoning test was also performed by acquiring LSV curves before and after addition of KSCN (0.01 M) with a poisoning time of 40 min [79].…”

Section: Cyclic Voltammetry (Cv)mentioning

confidence: 99%

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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“…In recent times, several nanostructured materials based on transition metals and composites have been developed for supercapacitor application as well as hydrogen evolution reactions, such as Co 3 O 4 , , NiCo 2 O 4 , − Fe 3 O 4 , , Co 3 O 4 -polyaniline, NiCo 2 S 4 -rGO, − MoS 2 -CNT, − MnCo 2 O 4 -MnCo 2 S 4 , − Cu 2 Mo 3 O 12 , − Ni 3 S 2 , − MnO 2 -rGO, , CoMoO 4 , − Co 3 S 4 , − and Ni-Co-P. − The transition metal oxides show high electrochemical performance such as a high charge-storage ability, high conversion efficiency, excellent energy and power density, and high electrochemical stability due to the presence of highly catalytic sites and a high surface area. Ghosh et al has developed an asymmetric supercapacitor device based on the hierarchical Co 3 S 4 and Ni 3 S 2 over reduced graphene oxide by the hydrothermal process and obtained an energy density of 55.16 Wh/kg with cyclic stability of 96.2% after 3000 cycles .…”

Section: Introductionmentioning

confidence: 99%

“…The earlierdeveloped electrocatalysts for the HER are noble metal-based oxides; though their performance is attractive, their use is somewhat limited because of the high cost. 3 In recent times, several nanostructured materials based on transition metals and composites have been developed for supercapacitor application as well as hydrogen evolution reactions, such as Co 3 O 4 , 4,5 27,28 CoMoO 4 , 29−32 Co 3 S 4 , 33−35 and Ni-Co-P. 36−38 The transition metal oxides show high electrochemical performance such as a high charge-storage ability, high conversion efficiency, excellent energy and power density, and high electrochemical stability due to the presence of highly 16 Wh/kg with cyclic stability of 96.2% after 3000 cycles. 39 Similarly, Wang et al prepared the Co 3 S 4 /CoP electrocatalyst for hydrogen evolution reactions by the hydrothermal route followed by phosphidation/sulfidation.…”

Section: ■ Introductionmentioning

confidence: 99%

Designing Novel Co₂FeV₂O₈ Microsticks with Prompted Multiple Electrochemical Performances for an Asymmetric Solid-State Supercapacitor and the Hydrogen Evolution Reaction

et al. 2022

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This article reports the preparation of novel Co 2 FeV 2 O 8 microsticks by the solvothermal route for multiple electrochemical applications such as a solid-state asymmetric supercapacitor and hydrogen evolution reactions. The prepared microstick's physical and chemical characterizations have been performed by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR), transmission electron microscope (TEM), and X-ray photoelectron spectroscopy (XPS) to ensure the phase purity and morphology of the material. Co 2 FeV 2 O 8 microsticks exhibit a specific capacity of 261 C g −1 at 1 A g −1 with excellent capacity retention after 10,000 cycles. Furthermore, the charge-storage contributions of the capacitive and diffusion-controlled process were estimated using Dunn's approach, and the estimation of accumulated external and internal surface charges was done using Trassati's approach. For practical applications, a solidstate asymmetric supercapacitor device has been fabricated, which exhibits excellent electrochemical energy storage performance such as an attractive specific capacity (352 C g −1 ), high capacitance retention for 10,000 cycles, and huge specific energy and power outcomes (60 Wh kg −1 at 900 W kg −1 ). Along with the energy storage performance, the prepared Co 2 FeV 2 O 8 exhibits excellent electrochemical energy conversion performance for the hydrogen evolution reactions. The electrode exhibits a low overpotential (188 mV) to generate the current density of 20 mA cm −2 in 1 M KOH, and also displays excellent stability at −1.3 V for 24 h. It is concluded that the HER of CFVO can be conducted through the Volmer−Heyrovsky mechanism with a Tafel slope of 97 mV dec −1 .

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Highly efficient hydrogen evolution reaction of Co3O4 supports on N-doped carbon nanotubes in an alkaline solution

Cited by 17 publications

References 48 publications

Construction of FeCo2O4@N-Doped Carbon Dots Nanoflowers as Binder Free Electrode for Reduction and Oxidation of Water

Construction of FeCo2O4@N-Doped Carbon Dots Nanoflowers as Binder Free Electrode for Reduction and Oxidation of Water

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

Designing Novel Co₂FeV₂O₈ Microsticks with Prompted Multiple Electrochemical Performances for an Asymmetric Solid-State Supercapacitor and the Hydrogen Evolution Reaction

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Highly efficient hydrogen evolution reaction of Co3O4 supports on N-doped carbon nanotubes in an alkaline solution

Cited by 17 publications

References 48 publications

Construction of FeCo2O4@N-Doped Carbon Dots Nanoflowers as Binder Free Electrode for Reduction and Oxidation of Water

Construction of FeCo2O4@N-Doped Carbon Dots Nanoflowers as Binder Free Electrode for Reduction and Oxidation of Water

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

Designing Novel Co2FeV2O8 Microsticks with Prompted Multiple Electrochemical Performances for an Asymmetric Solid-State Supercapacitor and the Hydrogen Evolution Reaction

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Designing Novel Co₂FeV₂O₈ Microsticks with Prompted Multiple Electrochemical Performances for an Asymmetric Solid-State Supercapacitor and the Hydrogen Evolution Reaction