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

Abstract

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.

A novel core@double-shell three-layer structure with dendritic fibrous morphology based on Fe3O4@TEA@Ni–organic framework: a highly efficient magnetic catalyst in the microwave-assisted Sonogashira coupling reaction

“…00-02-1216) respectively. 38,40 Hence, the XRD pattern confirms the success-ful modification of the Fe 3 O 4 @TEA core-shell structure by NiNH 2 BDC MOF and immobilization on it. To better realize the diffraction peaks of NiNH 2 BDC MOF formed onto the Fe 3 O 4 @TEA structure, the diffraction pattern of bare MOF was compared with the Fe 3 O 4 @TEA@MOF pattern in Fig.…”

“…37 The connection of the COO group of the NH 2 BDC with the nickel metal via the bidentate mode of linking is characterized by the gap between these two bands. 38 The region between 3300 and 3000 cm −1 is related to asymmetric and symmetric vibration bands of the N-H group that overlaps with the vibrational stretching mode of O-H. 38 Several bands that emerge at 1230 cm −1 , 775 cm −1 , and 560 cm −1 correspond to the C-N, C-H (out-of-plane bending mode of aromatic rings), and Ni-O bonds in the fabricated catalyst. [37][38][39] The presence of the Ni-O band confirms the successful connection of Ni metals with the ligands.…”

Synthesis and study of enhanced electrochemical properties of NiO nanoparticles deposited on TiO2 nanotubes

“…The anodic process was accomplished at room temperature utilizing a two-electrode electrochemical cell with the Ti plate as the anode and a Pt plate as the cathode and the distance between them was held at 10 mm. The substrates were prepared by applying an anodizing voltage of 20 V utilizing DC power supply (E3612A, Agilent Technologies) associated with 5 1 2 Digit Multimeter and then, at that point, associated with PC to draw (I-t) by utilizing Excel Intuilink in 0.5 wt % HF solution for 20 min. After anodization, samples were washed with deionized water and the as-anodized TiO 2 NTs were consequently annealed at 450 C in N 2 air F I G U R E 1 A schematic of (a) an alkaline fuel cell (AFCs) and (b) direct methanol alkaline fuel cell (DMAFCs) [30,31] T A B L E 1 Used materials…”

“…Creation of power by electrocatalytic oxidation of methanol in direct methanol fuel cells (DMFCs) is an appealing task with a few advantages, like high energy density, the low outflow of toxins, and low working temperature. [1,2] Nonetheless, the helpless energy of the anode response and the significant expense of platinum and platinumbased impetuses are the principal challenges that obstruct their commercialization. [3,4] Accordingly, electrocatalytic oxidation of methanol in alkaline media has received extensive considerations lately because of its more simple methanol oxidation response and more extensive decision of metallic impetus.…”

Advanced Strategies in Metal‐Organic Frameworks for CO2 Capture and Separation

“…Among several known MOF materials, some of these frameworks produced large internal spaces, creating structures with very high porosity and surface areas. [65][66][67][68] Numerous adsorbents have been previously reported in state-of-the-art review articles, including zeolites, MOFs, COFs, carbon based materials, hydroxides, carbonates, ceramics, polymers and amines [69][70][71][72][73][74][75][76][77][78][79][80] for CO 2 capture and separation. Among these, MOF materials are considered as the best possible alternative to the mentioned adsorbent.…”