Graphene based FeO/NiO MOF composites for methanol oxidation reaction

• Published in: Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2021-06, Vol.890, p.115249, Article 115249
• Main Authors: Noor, Tayyaba, Mohtashim, Muhammad, Iqbal, Naseem, Naqvi, Salman Raza, Zaman, Neelam, Rasheed, Lubna, Yousuf, Muhammad
• Format: Article
• Language: English
• Subjects: Bimetals; Catalysts; Composite materials; Cyclic voltammetry (CV); Graphene; Graphene oxide (GO); Iron oxides; Metal-organic frameworks; Metal–organic framework (MOF); Methanol; Methanol oxidation reaction (MOR); Nickel oxides; Oxidation; Reduced graphene oxide (rGO); Terephthalic acid
• ISSN: 1572-6657; 1873-2569
• DOI: 10.1016/j.jelechem.2021.115249

•NiO/FeO MOF and its reduced graphene oxide based composites such as 1–5 wt% FeO/NiO MOF were solvothermaly synthesized.•Synthesized bimetallic MOF and its reduced graphene oxide based composites (1–5 wt% FeO/NiO MOF) were employed as an electro catalyst for methanol oxidation.•4 wt% FeO/NiO MOF composite exhibit superior current density 486.14 mA/cm2 at potential of 0.85 V in 3 M CH3OH.•Key reason behind high catalytic activity of 4 wt% FeO/NiO MOF composite was because of synergetic effect of reduced graphene oxide and MOF catalysts. We report a novel bimetallic iron oxide/nickel oxide metal–organic framework (FeO/NiO MOF) that has been synthesized by using two different linkers; 2, 5-dihydroxy terephthalic acid (DHTA) and Pyrazine and also its composites are prepared with reduced graphene oxide from 1 to 5 wt% rGO FeO/NiO MOF and afterwards characterized via several important techniques like FTIR, XRD, SEM and EDX for examination of their morphological and structural properties. The synthesized series of bimetallic MOFs composites were later used as catalyst for methanol oxidation, tested via cyclic voltammetry (CV) in 3 M Methanol and 1 M NaOH on modified GCE. The electrochemical results illustrate that electrocatalytic response of the MOF boosts astonishingly with gradual loadings of rGO from (1–4 wt%) and among all prepared series 4 wt% rGO-FeO/NiO MOF shows the highest current density of 486.14 mA/cm2 at potential of 0.85 V with scan rate of 50 mV/cm2. This superlative response of prepared catalyst makes it a promising catalytic material for methanol oxidation in DMFC.