In situ growth of Ni(OH)2-porous nitrogen-doped graphene composite onto Ni foam support as advanced electrochemical supercapacitors materials

Aghazadeh, Mustafa; Rad, Hamzeh Forati

doi:10.1007/s10854-022-08082-3

Cited by 13 publications

(14 citation statements)

References 53 publications

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“…For the cobalt doped sample LFCO-0.2, all peaks were blue-shifted toward higher Raman shift by 6–10 cm –1 and it is attributed to the lattice strain, crystallite size effects, and structural distortions arising due to Co inclusion as the Co–O short-range ordering affects the long-range ordering of Co–O with the influence in the oxygen octahedral tilt, while the Raman spectra of Ni(OH) 2 as shown in Figure S1b display the presence of a pair of peaks at the far end wavenumber region above 3500 cm –1 , particularly at 3575 and 3638 cm –1 , corresponding to the symmetric O–H stretching vibration of lattice OH functionalities and the O–H vibration of the intercalated H 2 O layer in the interlamellar space of the Ni(OH) 2 structure, respectively. This observation confirms that the prepared Ni(OH) 2 sample is crystallized into the α-polymorph of Ni(OH) 2 with trigonal symmetry and in prefect agreement with the PXRD results, whereas the sharp intense peak observed at 476 cm –1 along with a broad tail around 452 cm –1 is assigned to the stretching lattice modes of Ni–OH . Another small sharp peak located at 1040 cm –1 is related to the second order transition.…”

Section: Resultssupporting

confidence: 88%

“…This observation confirms that the prepared Ni(OH) 2 sample is crystallized into the αpolymorph of Ni(OH) 2 with trigonal symmetry and in prefect agreement with the PXRD results, 36 whereas the sharp intense peak observed at 476 cm −1 along with a broad tail around 452 cm −1 is assigned to the stretching lattice modes of Ni−OH. 37 Another small sharp peak located at 1040 cm −1 is related to the second order transition. Due to the presence of structural disorder, the internal bending vibration of the O−H bond of…”

Section: ■ Introductionmentioning

confidence: 99%

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LaFe_1–xCo_xO₃ Perovskite Nanoparticles Supported on Ni(OH)₂ as Electrocatalyst for the Oxygen Evolution Reaction

Kubba,

Ahmed,

Roy

et al. 2024

ACS Appl. Nano Mater.

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Multifunctional ABO 3 perovskite oxide nanomaterial was found to be an exceptional electrocatalyst for the oxygen evolution reaction (OER), a key anodic reaction in water electrolysis. To modify the properties of perovskite oxide electrocatalysts, different activation strategies have been used in recent years. This study uses a combination of two activation strategies, namely, doping and nanocomposite fabrication, to generate a perovskite oxide as an electrocatalyst for the OER. Here, we have demonstrated this by synthesizing LaFeO 3 perovskite oxide nanoparticles with different percentages of cobalt doping on the B-site using the sol− gel method. The doping of smaller Co ions on Fe sites led to lattice distortion and compression in the LaFeO 3 crystal lattice, leading to microstrains at the grain boundaries and the formation of surface defects. Researchers then anchored composition-optimized doped LaFe 0.8 Co 0.2 O 3 perovskite nanoparticles onto nickel hydroxide (Ni(OH) 2 ) nanoflowers in the alpha phase by in situ hydrothermal treatment, resulting in the formation of the LaFe 0.8 Co 0.2 O 3 /Ni(OH) 2 (LFCO-0.2/Ni(OH) 2 ) nanocomposite. This hybrid nanocomposite showed a low overpotential of 329 mV at j = 10 mA/cm 2 and a small Tafel slope of 95 mV dec −1 for the OER. The increased activity of the electrocatalyst is attributed to the texture construction of the 2D Ni(OH) 2 nanoflowers decorated with doped LaFeO 3 nanoparticles and the synergistic effect between them. The synthesized LFCO-0.2/Ni(OH) 2 composite features a large number of active sites and an increased active surface area, resulting in excellent catalytic activity. This approach paves a change in the direction for the rational design of hybrid composites of perovskite nanomaterials with defect engineering for superior OER performance.

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Section: Resultssupporting

confidence: 88%

Section: ■ Introductionmentioning

confidence: 99%

LaFe_1–xCo_xO₃ Perovskite Nanoparticles Supported on Ni(OH)₂ as Electrocatalyst for the Oxygen Evolution Reaction

Kubba,

Ahmed,

Roy

et al. 2024

ACS Appl. Nano Mater.

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“…Furthermore, peaks at around 545 and 781 cm −1 , which correspond to the NiOH bond, were also observed in the NirGO3 spectrum. These results indicated that the composite contains oxide/hydroxide forms of Ni rather than Ni(NO 3 ) 2 36 . In addition, the ID/IG ratio is commonly utilized for the semiquantitative assessment of the reduction extent of reduced graphene oxide (rGO).…”

Section: Resultsmentioning

confidence: 99%

“…These results indicated that the composite contains oxide/hydroxide forms of Ni rather than Ni(NO 3 ) 2 . 36 In addition, the ID/IG ratio is commonly utilized for the semiquantitative assessment of the reduction extent of reduced graphene oxide (rGO). Analysis of Figure 1A reveals that the ID/IG ratios follow the order of ID/IG (Ni(OH) 2 /RGO) < ID/IG (rGO).…”

Section: Structural Characterization Of Electrode Materialsmentioning

confidence: 99%

“…Furthermore, the disappearance of the sharp peak of the (100) graphene plane and the observed broad peaks of α-Ni(OH) 2 indicate that the obtained composite has a highly amorphous character. 36,38 Increasing the amorphous form in the structure provides higher capacitance with Ni-based composite electrodes. It has also been previously reported that the α-crystal phase gives better capacitive performance.…”

Section: Structural Characterization Of Electrode Materialsmentioning

confidence: 99%

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One‐step preparation of binder‐free nickel‐containing graphene foam electrode for supercapacitors

Siyahjani Gultekin,

Karimi,

Can

et al. 2024

Energy Storage

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In this study, a nickel hydroxide (Ni(OH)2)‐modified reduced graphene oxide (rGO) foam electrode for supercapacitor application is presented. The electrode was prepared without using a binder through a one‐step process with three different ratios (NirGO1, NirGO2, and NirGo3). To compare the supercapacitor performance of the obtained graphene foam electrodes, rGO and rGO:carbon black (CB) standard electrodes with PVDF‐HFP binder were also prepared. All electrodes were then characterized structurally (XPS, EDS, RAMAN, XRD, and FT‐IR) and morphologically (SEM). Structural characterizations demonstrated that the Ni‐containing electrodes were in α‐Ni(OH)2:rGO structure. In addition, NirGO3 exhibited a specific capacitance of 800 F g−1 which is relatively the highest performance between the foam electrodes, while rGO:CB presented a specific capacitance of 900 F g−1. The results demonstrated that with the method proposed for electrode development, it was possible to obtain comparable results with the standard electrode rGO:CB.

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Electron transfer enhanced catalytic activity of nitrogen doped reduced graphene oxide supported CuCo2O4 towards the fast reduction of 4-nitrophenol in water

Jacob,

Mohan,

K C

et al. 2024

Environmental Research

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In situ growth of Ni(OH)2-porous nitrogen-doped graphene composite onto Ni foam support as advanced electrochemical supercapacitors materials

Cited by 13 publications

References 53 publications

LaFe_1–xCo_xO₃ Perovskite Nanoparticles Supported on Ni(OH)₂ as Electrocatalyst for the Oxygen Evolution Reaction

LaFe_1–xCo_xO₃ Perovskite Nanoparticles Supported on Ni(OH)₂ as Electrocatalyst for the Oxygen Evolution Reaction

One‐step preparation of binder‐free nickel‐containing graphene foam electrode for supercapacitors

Electron transfer enhanced catalytic activity of nitrogen doped reduced graphene oxide supported CuCo2O4 towards the fast reduction of 4-nitrophenol in water

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In situ growth of Ni(OH)2-porous nitrogen-doped graphene composite onto Ni foam support as advanced electrochemical supercapacitors materials

Cited by 13 publications

References 53 publications

LaFe1–xCoxO3 Perovskite Nanoparticles Supported on Ni(OH)2 as Electrocatalyst for the Oxygen Evolution Reaction

LaFe1–xCoxO3 Perovskite Nanoparticles Supported on Ni(OH)2 as Electrocatalyst for the Oxygen Evolution Reaction

One‐step preparation of binder‐free nickel‐containing graphene foam electrode for supercapacitors

Electron transfer enhanced catalytic activity of nitrogen doped reduced graphene oxide supported CuCo2O4 towards the fast reduction of 4-nitrophenol in water

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Product

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LaFe_1–xCo_xO₃ Perovskite Nanoparticles Supported on Ni(OH)₂ as Electrocatalyst for the Oxygen Evolution Reaction

LaFe_1–xCo_xO₃ Perovskite Nanoparticles Supported on Ni(OH)₂ as Electrocatalyst for the Oxygen Evolution Reaction