Performance evaluation of nickel as anode catalyst for DMFC in acidic and alkaline medium

Sunitha, M; Nagarajan, Durgadevi; Sathish, Asha; Ramachandran, T.

doi:10.1016/s1872-5813(18)30026-4

Cited by 26 publications

(6 citation statements)

References 34 publications

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“…6b. As can be seen, with increasing methanol concentration anodic peak current that related to methanol oxidation is increased [30]. This observation confirms that this peak is for methanol oxidation reaction.…”

Section: The Effect Of Methanol Concentration On Methanol Oxidationsupporting

confidence: 78%

“…5. The sharp increase of anodic current in voltammogram (2) after the addition of methanol shows the catalytic oxidation of methanol at the surface of the modified electrode according to the literature [30]. The methanol oxidation peak is at potential about 0.23 V at the surface of Ni-MMT/CPE.…”

Section: Electro-catalysis Of the Methanol Oxidation In Acidic Mediasupporting

confidence: 59%

“…As can be seen, by increasing the concentration of the H 2 SO 4 , the anodic current of the methanol oxidation was increased at methanol concentration of 0.1 M. In addition, by increasing the concentration of the electrolyte, a slightly positive potential shift is observed in Fig. 6a [30]. Therefore, it can be concluded that the H 2 SO 4 has an essential role in the oxidation of methanol.…”

Section: The Effect Of Electrolyte Concentration On Methanol Oxidationmentioning

confidence: 71%

“…Positive shift of anodic peak with an increase in the scan rate shows the irreversible electrode process [34]. Also, the potential shift is due to IR drop generated at higher current density values [30]. The linear relationship of methanol oxidation current with the square root of the potential scan rate (inset of Fig.…”

Section: The Effect Of Potential Scan Rate On the Methanol Oxidationmentioning

confidence: 92%

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Electrochemical activity of Ni-montmorillonite/Vulcan XC-72R carbon black nano-catalyst for the oxidation of methanol in acidic medium

et al. 2019

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Direct methanol fuel cell is claiming to be the most main power source in future as a clean energy source, for which methanol is used as fuel. In the present study, nickel nanoparticles were synthesized by green route in the presence of montmorillonite (Ni-MMT). Then the electrochemical activity of prepared nanocomposite was investigated in methanol oxidation reaction in acidic medium. In the process of nickel nanoparticle synthesis, the natural substrate montmorillonite was used as capping agent and Allium jesdianum water extract was used as the source of reducing agent for the first time. The Ni-MMT sample was characterized by UV-Vis, XRD, SEM and EDX techniques. Production of nickel nanoparticles in the proposed green method is confirmed by absorption peak of 405 nm in UV-Vis spectrum. The average particle size of Ni-MMT was determined as 20.80 nm. The oxidation of methanol in acidic medium was studied by cyclic voltammetry using Ni-MMTmodified carbon paste electrode (Ni-MMT/CPE). Methanol was oxidized on the modified electrode surface at 0.3 V. Also, the catalytic current of methanol oxidation was 3 mA in H 2 SO 4 electrolyte which is significantly more than unmodified CPE. The concentration of 0.5 M for H 2 SO 4 was obtained as the optimum electrolyte for the oxidation of methanol. Methanol can be catalyzed in the concentration range of 0.1-0.5 M by the prepared nanostructured catalyst. Graphic abstractNi nanoparticles in montmorillonite (Ni-MMT) which was prepared by Allium jesdianum extract have a good electrocatalytic effect on methanol oxidation.

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Section: The Effect Of Methanol Concentration On Methanol Oxidationsupporting

confidence: 78%

Section: Electro-catalysis Of the Methanol Oxidation In Acidic Mediasupporting

confidence: 59%

Section: The Effect Of Electrolyte Concentration On Methanol Oxidationmentioning

confidence: 71%

Section: The Effect Of Potential Scan Rate On the Methanol Oxidationmentioning

confidence: 92%

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Electrochemical activity of Ni-montmorillonite/Vulcan XC-72R carbon black nano-catalyst for the oxidation of methanol in acidic medium

et al. 2019

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“…In the case of a Nickel-based system, NiO smoothened the CO oxidation by providing required oxygen while the NiOOH group promotes the MOR by Ni +2 /Ni +3 oxidation/reduction process where + 2 to + 3 oxidation further promote CO oxidation 35 , 106 .…”

Section: Resultsmentioning

confidence: 99%

Electrocatalytic performance of NiNH2BDC MOF based composites with rGO for methanol oxidation reaction

Yaqoob

Nооr

Iqbal

et al. 2021

Sci Rep

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Present work comprehensively investigated the electrochemical response of Nickel-2 Aminoterephthalic acid Metal–Organic Framework (NiNH2BDC) and its reduced graphitic carbon (rGO) based hybrids for methanol (CH3OH) oxidation reaction (MOR) in an alkaline environment. In a thorough analysis of a solvothermally synthesized Metal–Organic Frameworks (MOFs) and its reduced graphitic carbon-based hybrids, functional groups detection was performed by FTIR, the morphological study by SEM, crystal structure analysis via XRD, and elemental analysis through XPS while electrochemical testing was accomplished by Chronoamperometry (CA), Cyclic Voltametric method (CV), Electrochemically Active Surface Area (EASA), Tafel slope (b), Electron Impedance Spectroscopy (EIS), Mass Activity, and roughness factor. Among all the fabricated composites, NiNH2BDC MOF/5 wt% rGO hybrid by possessing an auspicious current density (j) of 267.7 mA/cm2 at 0.699 V (vs Hg/HgO), a Tafel slope value of 60.8 mV dec−1, EASA value of 15.7 cm2, and by exhibiting resistance of 13.26 Ω in a 3 M CH3OH/1 M NaOH solution displays grander electrocatalytic activity as compared to state-of-the-art platinum-based electrocatalysts.

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Development of Advanced Pd-Based Electrocatalysts for High Performing Fuel Cell System

Fuku,

Mkhohlakali,

Maumau

et al. 2024

Environmental Chemistry for a Sustainable World

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Performance evaluation of nickel as anode catalyst for DMFC in acidic and alkaline medium

Cited by 26 publications

References 34 publications

Electrochemical activity of Ni-montmorillonite/Vulcan XC-72R carbon black nano-catalyst for the oxidation of methanol in acidic medium

Electrochemical activity of Ni-montmorillonite/Vulcan XC-72R carbon black nano-catalyst for the oxidation of methanol in acidic medium

Electrocatalytic performance of NiNH2BDC MOF based composites with rGO for methanol oxidation reaction

Development of Advanced Pd-Based Electrocatalysts for High Performing Fuel Cell System

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