Electrochemical hydrogen storage in high surface area microporous carbon from disposable diaper waste
Por:
Giovanni-Mondragón, C, RamonLobato-Peralta, D, Okolie, JA, Arias, DM, Orugba, HO, Sebastian, PJ, Okoye, PU
Publicada:
2 ene 2024
Ahead of Print:
1 dic 2023
Resumen:
The superabsorbent polymer (SAP) of the disposable diaper, which could serve as a substrate for pathogen growth, was valorized into nanostructured carbon through chemical activation for electrochemical hydrogen storage. The Box-Behnken experimental design was employed to elucidate the effects of activation conditions. Optimization results show that activation temperature and KOH:SAPC molar ratio had a greater impact on the textural and morphological characteristics of the nano-activated carbon. The best electrode material exhibited a surface area of 2552 m2/g, a total pore volume of 1.28 cm3/g, a total micropore volume of 0.871 cm3/g, and a pore size of 1.32 nm. The galvanostatic charge/ discharge curves indicate that only higher current densities of 1 and 2 A/g could achieve a faster release of stored hydrogen in approximately 4 min. The best material stored hydrogen mainly through the electric double-layer mechanism, and the specific capacity reached 1878 mAh/g (6.60 wt% of H2), which ranks among the best-reported hydrogen storage capacities with activated carbon. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Filiaciones:
UNAM, Inst Energias Renovables IER, Privada Xochicalco S-N Col Ctr, Temixco 62580, Morelos, Mexico
Univ Oklahoma, Gallogly Coll Engn, Norman, OK 73019 USA
Delta State Univ, Dept Chem Engn, Abraka, Nigeria
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