Study of derivatives of (E)-1-(3-aryl-1-phenyl-1H-pyrazol-4-yl)but-2-en-1-one for enhancing reduction efficiency of compost based microbial fuel cell

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2025, Vol.131 (1), Article 28
• Main Authors: Devi, Poonam, Yadav, Sidhant, Pundeer, Rashmi, Gupta, Suhaas, Anand, Hardeep, Choubey, Ravi Kant, Kumar, Vijay, Gaur, Anurag, Kumar, Sunil
• Format: Article
• Language: English
• Subjects: Biochemical fuel cells; Catalytic activity; Cathodes; Characterization and Evaluation of Materials; Chemical synthesis; Claisen-Schmidt reaction; Composting; Condensed Matter Physics; Electrical measurement; Electrochemical impedance spectroscopy; Electrons; Fourier series; Fourier transforms; Fuel cells; Infrared spectroscopy; Ketones; Machines; Manufacturing; Microorganisms; Nanotechnology; NMR; NMR spectroscopy; Nuclear magnetic resonance; Optical and Electronic Materials; Oxidizing agents; Physics; Physics and Astronomy; Processes; Pyrazole; Spectrum analysis; Surfaces and Interfaces; Thin Films; Voltammetry
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-024-08163-6

A series of α-, β-unsaturated ketone derivatives of four substituted pyrazoles were synthesised using Claisen-Schmidt condensation reaction and were characterised using Fourier-transform infrared (FTIR) spectroscopy, 1 H nuclear magnetic resonance (NMR) and 13 C NMR spectroscopy. Further, these derivatives were studied under application as an oxidising agent in a compost-based microbial fuel cell (cMFC) to enhance its reduction efficiency. Characterisation methods of cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS) and chrono-amperometry (CS) were employed to analyse the behaviour of the coin-cell device with and without pyrazoles at the cathode. Concentration dependence of the best pyrazole out of the series was studied to optimise the device performance. The results indicate the enhancement in bio-electro-catalytic activity and output power density when the cathode of the cMFC is laced with pyrazoles. In addition, sustainability and stability of the device was also investigated, and study to confirm the role of micro-organisms in the compost was also performed.