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<p>Efficient oxygen evolution reaction (OER) is vital for water electrolysis, rechargeable metal–air batteries, and regenerative fuel cells. This study has highlighted a modest and straightforward approach for the preparation of 3-aminopropyl trimethoxysilane (APTMS)-functionalized graphene oxide (GO-APTMS) and its composites with cobalt (GO-APTMS/Co) and nickel (GO-APTMS/Ni). The prepared catalysts were utilized for the oxygen evolution reaction (OER) in a basic medium (0.1&#xa0;M KOH). The prepared composites, GO-APTMS/Ni and GO-APTMS/Co, are characterized using spectroscopic methods, such as Fourier transform infrared (FT-IR), ultraviolet (UV-vis), powder X-ray diffraction (P-XRD), FT-Raman, X-ray photoelectron spectroscopy (XPS), and energy dispersive X-ray spectroscopy (EDS). It was also characterized with transmission electron microscopy (TEM) and selected area electron diffraction (SAED). The nanocomposites GO-APTMS/Ni and GO-APTMS/Co are deposited on the surface of a glassy carbon (GC) electrode to study their electrochemical behavior. It is observed that GC modified GO-APTMS/Ni (GC/GO-APTMS/Ni) and GO-APTMS/Co (GC/GO-APTMS/Co) have efficient OER activity. The Tafel slopes of nanocomposite materials GC/GO-APTMS-Co and GC/GO-APTMS-Ni are 74 and 183 mV/dec, respectively, in a 0.1&#xa0;M KOH solution. GC/GO-APTMS/Co and GC/GO-APTMS/Ni exhibit remarkable OER activity with low onset potentials of 1.63 and 1.65&#xa0;V, respectively, with satisfactory operational stability. This indicates that GC/GO-APTMS-Co could be a promising, cost-effective electrode material for OER. This study demonstrates a novel way of creating an active nanocomposite catalyst for OER in alkaline media. Hence, it could be a suitable alternative for the replacement of a high-cost electrocatalyst in the fuel cells, metal-air batteries, water electrolyzers, etc.</p> Graphical Abstract <p></p>

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Enhanced Oxygen Evolution Reaction with Co and Ni Tailored Nanoarchitecture on Amine-Functionalized Graphene Oxide

  • 期刊论文

  • 发表日期：

    2026年6月16日

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  • Narvdeshwar Kumar,
  • Vikas Jangra,
  • Upendra Kumar,
  • Anand Ratnam,
  • Piyush Kumar Sonkar

摘要

Efficient oxygen evolution reaction (OER) is vital for water electrolysis, rechargeable metal–air batteries, and regenerative fuel cells. This study has highlighted a modest and straightforward approach for the preparation of 3-aminopropyl trimethoxysilane (APTMS)-functionalized graphene oxide (GO-APTMS) and its composites with cobalt (GO-APTMS/Co) and nickel (GO-APTMS/Ni). The prepared catalysts were utilized for the oxygen evolution reaction (OER) in a basic medium (0.1 M KOH). The prepared composites, GO-APTMS/Ni and GO-APTMS/Co, are characterized using spectroscopic methods, such as Fourier transform infrared (FT-IR), ultraviolet (UV-vis), powder X-ray diffraction (P-XRD), FT-Raman, X-ray photoelectron spectroscopy (XPS), and energy dispersive X-ray spectroscopy (EDS). It was also characterized with transmission electron microscopy (TEM) and selected area electron diffraction (SAED). The nanocomposites GO-APTMS/Ni and GO-APTMS/Co are deposited on the surface of a glassy carbon (GC) electrode to study their electrochemical behavior. It is observed that GC modified GO-APTMS/Ni (GC/GO-APTMS/Ni) and GO-APTMS/Co (GC/GO-APTMS/Co) have efficient OER activity. The Tafel slopes of nanocomposite materials GC/GO-APTMS-Co and GC/GO-APTMS-Ni are 74 and 183 mV/dec, respectively, in a 0.1 M KOH solution. GC/GO-APTMS/Co and GC/GO-APTMS/Ni exhibit remarkable OER activity with low onset potentials of 1.63 and 1.65 V, respectively, with satisfactory operational stability. This indicates that GC/GO-APTMS-Co could be a promising, cost-effective electrode material for OER. This study demonstrates a novel way of creating an active nanocomposite catalyst for OER in alkaline media. Hence, it could be a suitable alternative for the replacement of a high-cost electrocatalyst in the fuel cells, metal-air batteries, water electrolyzers, etc.

Graphical Abstract