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Trimetallic Co-Ni-Mn metal-organic framework as an efficient electrocatalyst for alkaline oxygen evolution reaction

Taherinia, D ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jelechem.2022.116720
  3. Publisher: Elsevier B.V , 2022
  4. Abstract:
  5. Designing efficient and inexpensive catalysts toward the oxygen evolution reaction (OER) is vital for achieving sustainable and green hydrogen fuel production through water electrolysis. Herein, we have synthesized several bi- and trimetallic metal–organic frameworks (MOFs) composed of Co, Ni, and Mn metals and benzene-1,3,5-tricarboxylic acid linker. The MOFs were prepared via a simple hydrothermal method, and their electrocatalytic performances in alkaline OER were investigated. A battery of analytical techniques was employed to characterize the as-synthesized materials, including field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and nitrogen adsorption–desorption analysis. It was found that the trimetallic CoNiMn-MOF exhibits the highest electrocatalytic activity in OER, with an overpotential of 220 mV at the current density of 20 mA cm−2, a Tafel slope of 66 mV dec−1, and a very good electrochemical stability for 20 h. Remarkably, this trimetallic MOF can deliver a high current density of 250 mA cm−2 at an overpotential of only 293 mV. These findings indicate the great potential of CoNiMn-MOF as a high-performance and cost-effective catalyst for the electrochemical oxidation of water. © 2022 Elsevier B.V
  6. Keywords:
  7. Electrocatalyst ; Metal-organic frameworks ; Oxygen evolution reaction ; Cobalt alloys ; Cost effectiveness ; Electrochemical oxidation ; Enamels ; Field emission microscopes ; Fourier transform infrared spectroscopy ; High resolution transmission electron microscopy ; Manganese alloys ; Metal-Organic Frameworks ; Metals ; Oxygen ; Scanning electron microscopy ; Ternary alloys ; Alkalines ; Bimetallics ; Fuel production ; Metalorganic frameworks (MOFs) ; Overpotential ; Synthesised ; Tricarboxylic acids ; Trimetallic ; Water electrolysis ; ]+ catalyst ; Electrocatalysts
  8. Source: Journal of Electroanalytical Chemistry ; Volume 922 , 2022 ; 15726657 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S1572665722007123