| Autor: |
Hareesha, N., Soumya, D.M., Mounesh, Manjunatha, J.G., Rohit, R.N., Manikanta, P., Varun, D.N., Ataollahi, N., Thippeswamy, B.A., Pramoda, K., Nagaraja, B.M. |
| Zdroj: |
Journal of Environmental Chemical Engineering; October 2024, Vol. 12 Issue: 5 |
| Abstrakt: |
The electrochemical strategies with green electrocatalysts propose a selective, steady, and sensitive direction for the trace analytes sensing, hydrogen evolution reaction (HER), and oxygen evolution reaction (OER) applications. Herein, Honeycomb Polypore biomass waste-derived NaOH-activated porous nanocarbon material was synthesized, which performs as a multifunctional electrocatalyst for Hg2+sensing and water-splitting reactions with the support of graphite and Nafion composite. The optimized nanocomposite shows high electrochemical activity for the redox reaction of Hg2+in 0.1 M phosphate-buffered saline of 5.0 pH with a lower limit of detection value of 2.309 nM, good stability, reproducibility, and anti-interference activity. For water-splitting reactions, the optimized nanocomposite shows better overpotential values of 0.447 V (HER in 0.5 M H2SO4) and 0.305 V (OER in 0.5 M KOH) at 10.0 mA/cm2 of current density. Also, the lower Tafel slope values of 0.089 V/decade and 0.075 V/decade of the optimum electrocatalyst signify superior proficiency towards the HER and OER activities, respectively. These outcomes validate the materials’ excellent multifunctional activity for Hg2+detection in different water samples and water-splitting reactions, boosting their potential for environmental safety and energy production. |
| Databáze: |
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