| Fabrication of novel FeSe–GO composite: a highly efficient electro-catalyst for oxygen evolution reaction |
Khadim Hussain1, Ali Junaid1, Syed Imran Abbas Shah1, Muhammad Moazzam Khan1, Muhammad Omer Shoaib1, Nigarish Bano1, Razan A. Alshgari2, Nosheen Blouch3, Muhammad Fahad Ehsan4, Muhammad Naseem Ashiq1
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1Institute of Chemical Sciences, Bahauddin Zakariya University, Multan, 60800, Pakistan
2Department of Chemistry, College of Science, King Saud University, 11451, Riyadh, Saudi Arabia
3Department of Building and Architectural Engineering, Faculty of Engineering and Technology, Bahauddin Zakariya University, Multan, 60800, Pakistan
4Department of Civil and Environmental Engineering, Northeastern University, Boston, MA, 02115, USA |
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Received: January 30, 2024; Revised: June 15, 2024 Accepted: July 5, 2024. Published online: August 26, 2024. |
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| ABSTRACT |
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For oxygen evolution reaction (OER) to exhibit faster kinetics and a lower overpotential, highly active catalysts are required. Iron selenide (FeSe) possesses a favorable electronic configuration for Fe ions necessary for OER. Hence, it is long been regarded as a potential electrocatalyst. The primary drawbacks, however, are insufficient disclosure of active sites and weak electron conductivity, and to overcome these, we provide FeSe hybridized with graphene oxide (FeSe@GO) as very effective electrocatalyst for OER. FeSe@GO possesses a larger specific surface area of 175 cm3 g-1 with average pore size of 0.16 nm than pristine FeSe (48 cm2 g-1 and 0.08 nm) and Graphene oxide nanoparticles (66 cm3 g-1 and 0.149 nm). The overpotential of FeSe towards OER is significantly reduced under alkaline circumstances due to the regulation of its electronic structure. At the same time, graphene oxide (GO) undergoes a process of hybridization that boosts its conductivity, resulting in increased OER activity. The Tafel value of FeSe@GO is 48 mV dec-1, its overpotential is 203 mV at 10 mA cm-2, and its EIS value is 2.71 Ω which are remarkable than commercial RuO2 having 249 mV overpotential. Moreover, FeSe@GO also demonstrates good stability and long-term durability. |
| Key words:
Transition metals selenide (TMSe) · Graphene oxide · OER · Low overpotential · Electrochemical water splitting |
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