Abstract:In this research, electrocatalytic activity of cobalt benzene tricarboxylic acid metal organic framework (Co BTC MOF) and its reduced graphene oxide based composites (rGO/Co BTC) were investigated in an alkaline media for the methanol oxidation reaction (MOR). Metal Organic frameworks (MOF) and their composites were solvothermally prepared and characterized via FTIR, EDX, SEM and XRD. Electrochemical studies were performed by cyclic voltammetry, electron impedance spectroscopy, chronoamperometry and cyclic sta… Show more
“…At low content of CH 3 OH, the boosted current response is owing to excess of available OH − ions owing to diffusion-controlled methanol transport process while at high CH 3 OH concentration, excess of methanol limit the OH − adsorption, and reaction intermediates block the active sites and consequently depress the catalytic activity, Fig. 7 b 77 – 79 . Figure 7 ( a ) Influence of electrocatalyst deposited quantity, and ( b ) CH 3 OH molarity on the current density response of NiNH 2 BDC MOF/1, 2, 5 wt% reduced graphitic carbon hybrids during the optimization process.…”
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.
“…At low content of CH 3 OH, the boosted current response is owing to excess of available OH − ions owing to diffusion-controlled methanol transport process while at high CH 3 OH concentration, excess of methanol limit the OH − adsorption, and reaction intermediates block the active sites and consequently depress the catalytic activity, Fig. 7 b 77 – 79 . Figure 7 ( a ) Influence of electrocatalyst deposited quantity, and ( b ) CH 3 OH molarity on the current density response of NiNH 2 BDC MOF/1, 2, 5 wt% reduced graphitic carbon hybrids during the optimization process.…”
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.
“…It is an effective approach to evaluate MOR activity. Using the formula (E‐E o ), 50 the overpotential is determined. The NiMnCo/NPC composite has a smaller overpotential curve in this investigation.…”
In this study, the electrocatalytic activity of mono-metallic Co/NPC, bi-metallic MnCo/NPC, and ternary NiMnCo/NPC in alkaline media for the methanol oxidation process was examined (MOR). These materials were produced using a simple solution mixing method and characterized using FTIR, EDX, SEM, XPS, TGA, and XRD. In a three-electrode arrangement, on glassy carbon electrodes, the investigation of methanol oxidation for electrochemical activity of catalysts was carried in 1 M NaOH and 3 M CH 3 OH. Electrochemical studies included cyclic voltammetry (CV), chronoamperometry (CA), and electron impedance spectroscopy (EIS). The ternary NiMnCo/NPC composite, which has a peak current density of 147.85 mA/cm 2 at 0.8 potential and a scan rate of 50 mV/s among all the composites developed, is a promising catalyst for methanol electrocatalysis.
“…Co BTC 1 wt% rGO composite (2.5 mg) shows good electrocatalytic activity by producing a current density of 130 mA/cm 2 at peak potential of 1.59 V(RHE) along with Tafel slope of 83.6 mV/dec, resistance of 14.75 Ω, and long-term stability for 3500 seconds in 1 M KOH and 2 M methanol solution. 182 Maybodi et al, in 2015, reported nonporous ZIF-8 nanoparticles, synthesized at ambient conditions by using a facile template-free strategy. To decrease the overvoltage of CH 3 OH oxidation on CPE (carbon paste electrode), nickel incorporated ZIF-8 modified carbon paste electrode (Ni/ZIF-8CPE) was fabricated as a reformed electrode.…”
Section: Mof and Mof-derived Materials/ Carbon-based Composites Formentioning
confidence: 99%
“…Spherical shape nanoparticles synthesized through solvothermal technique were characterized through FTIR, SEM, XRD, and EDX, and electrochemical testing was carried out through EIS, CV, and chronoamperometry. Co BTC 1 wt% rGO composite (2.5 mg) shows good electrocatalytic activity by producing a current density of 130 mA/cm 2 at peak potential of 1.59 V(RHE) along with Tafel slope of 83.6 mV/dec, resistance of 14.75 Ω, and long‐term stability for 3500 seconds in 1 M KOH and 2 M methanol solution 182 …”
Section: Materials For a Methanol Oxidation Reactionmentioning
The human craving for energy is continually mounting and becoming progressively difficult to Gratify. At present, the world's massive energy demands are chiefly encountered by nonrenewable and benign fossil fuels. However, the development of dynamic energy cradles for a gradually thriving world to lessen fossil fuel reserve depletion and environmental concerns are persistent issues for society at present. The discovery of copious nonconventional resources to fill the gap between energy petition and supply is the extreme obligation of the modern era. A new emergent, clean, and robust alternate of fossil fuels are the fuel cells. Among the different types of fuel cells, direct methanol fuel cells are an outstanding option for light-duty vehicles and portable devices. A critical tactic for striving and sustainable energy sources is the production of highly proficient, economical, and green catalysts for energy storage and conversion devices. Up till now a broad range of research work is available to use Pt and modify Ptbased electrocatalysts to augment the CH 3 OH oxidation process. Platinum-based nanocubes, nanorods, nanoflower, hybrids of Pt with metal-oxides such as Fe 2 O 3 , TiO 2 , SnO 2 , MnO, Cu 2 O, ZnO, and with conducting polymers are extensively utilized in both acidic and basic media. Moreover, Pd-based materials, transition metal-based materials as well as MOF and MOF-derived materials are also the point of interest for researchers nowadays. However, the problem associated with their practical applications is that they can be effectively employed in basic media due to comparative less stability in acidic medium. This review article will deliver a broad vision of the current progress of the MOR process concerning noble metals, transition metals, and MOF-based materials.
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