Nanocomposites of cobalt benzene tricarboxylic acid MOF with rGO: An efficient and robust electrocatalyst for oxygen evolution reaction (OER). (August 2020)

• Record Type: Journal Article
• Authors: Yaqoob, Lubna; Noor, Tayyaba; Iqbal, Naseem; Nasir, Habib; Sohail, Manzar; Zaman, Neelam; Usman, Muhammad
• Is Part Of: Renewable energy. Volume 156(2020)
• Page Start: 1040
• Page End: 1054
• Publication Date: 2020-08
• Subjects: Co-BTC -- Metal organic framework -- Reduced graphene oxide -- Oxygen evolution reaction -- Electrocatalysis; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2020.04.131
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: In this work, electrocatalytic studies of highly active and non-precious metal based Cobalt benzene tricarboxlic acid (Co BTC) metal organic framework (MOF) and its reduced graphene oxide (rGO) composites for oxygen evolution reaction (OER) were performed in an alkaline media by employing cyclic voltammetry. Cobalt based MOF and their rGO composites were solvothermally synthesized. Prepared samples were further characterized for structural and morphological analysis through X-rays diffraction (XRD), scanning electron microscopy (SEM), Fourier transform Infrared (FTIR) spectroscopy and Energy dispersive spectroscopy (EDX) techniques. During CV studies the main emphasis was to observe the effect of rGO concentration on electrochemical response of synthesized materials for OER. Co BTC-5 wt % rGO (Cobalt benzene tricarboxlic acid-reduced graphene oxide) composite with current density of 10 mA/cm 2 at over potential 0.29 V vs. RHE proved to be a potential candidate due to its high activity and stability for OER. Graphical abstract: Image 1 Highlights: Co BTC-rGO composites were synthesized solvothermaly at 100 °C. Co BTC-5wt% rGO showed peak current density of 287 mA/cm 2 in CV at scan rate of 200 mV/s in alkaline media. In LSV Co BTC-5wt% rGO showed current density of 10 mA/cm 2 at Von set 1.45 V and η 0.29 vs RHE. Exhibited excellent stability studied via chronoamperometry experiment. Synergic effect among rGO and Co BTC MOF active sites.