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- Title
Trifunctional cobalt–molybdenum metal–organic framework for electrochemical oxygen evolution reaction and aromatic nitrosensing applications.
- Authors
Subramanian, Bhuvaneswari Thasma; Thomas, Simi; Biju, Valsala Madhavan Nair
- Abstract
The oxygen evolution reaction (OER) is a crucial step in the development of electrochemical energy storage systems and conversion technologies, such as alkaline fuel cells, water-splitting, and rechargeable batteries. As a result, the design of efficient, low-cost and long-lasting OER electrocatalysts is one of the biggest modern day challenges in the field of renewable energies. Because of the high surface area, high porosity, and variable constitution, metal–organic frameworks are used as OER electrocatalysts. In this study, CoMo-H3BTC, Co-H3BTC and Mo-H3BTC were prepared using solvothermal method, at 135 °C for 16 h. The functional behavior, structure, morphology, and oxidation state of the electrocatalysts were analyzed by X-ray diffraction studies, Fourier transform infrared spectra, Scanning electron microscopy, Energy-dispersive X-ray, and X-ray photoelectron spectroscopy. The prepared CoMo-H3BTC composites showed high electrocatalytic properties toward OER as well as improved nitrosensing capabilities. CoMo-H3BTC demonstrates OER catalytic activity with overpotential of 320 mV at a current density of 10 mA cm−2 and a 59 mV dec−1 of Tafel slope value with good stability. Also, CoMo-H3BTC electrocatalysts have better sensing applications toward nitroaromatics such as nitrobenzene and 2, 4-dinitrotoluene with a detection limit of 0.128 µM and 0.197 µM, respectively. The excellent OER activity, low Tafel slope value, improved durability, and good nitrosensing ability of CoMo-H3BTC will meet the real-world applications.
- Subjects
HYDROGEN evolution reactions; OXYGEN evolution reactions; METAL-organic frameworks; ALKALINE fuel cells; X-ray photoelectron spectroscopy; ENERGY storage; CATALYTIC activity
- Publication
Journal of Applied Electrochemistry, 2024, Vol 54, Issue 3, p559
- ISSN
0021-891X
- Publication type
Article
- DOI
10.1007/s10800-023-01977-x