Hetero carbon structures derived from waste plastics as an efficient electrocatalyst for water splitting and high-performance capacitors

Catégorie : Recyclage Chimique des Déchets Plastiques
Date :9 octobre 2020
Avis TSC : Cette publication, un peu technique, montre la possibilité de synthétiser des molécules organiques à hétérocarbone à partir de simples déchets plastiques traités à l’autoclave. Celles-ci peuvent remplacer de coûteux catalyseurs à base de platine pour l’hydrolyse de l’eau qui conduit à la production d’hydrogène et pour la fabrication d’électrodes utilisées dans des condensateurs électriques. Cette approche compatible avec l’économie circulaire, est en phase avec la réduction des besoins en ressources rares, comme le platine. Toutefois, les volumes de production envisagés, ne résoudront pas la gestion des déchets plastiques.
Mir, Rameez Ahmad; Singla, Shivani; Pandey, O. P.
Physica E-Low-Dimensional Systems & Nanostructures : 124
The demand of clean renewable energy sources and storage devices has led to the development of new materials. Hydrogen is a promising energy source having high efficiency compared to the diminishing fossil fuels. To commercialize hydrogen as the energy source and reduce the production cost, replacement of Pt-based catalysts with a cost-effective and efficient electrocatalyst is the current need of the day. In the present study, hetero carbon structures (HCS) have been fabricated in a single step from plastic waste in an autoclave. The morphological studies confirm the presence of heterostructures. The X-ray diffraction (XRD) and Raman spectroscopy studies predict the graphitic nature of synthesized HCS. The synthesized HCS are found to have high hydrogen evolution reaction (HER) performance with the enhanced current density of 50 mAcm(-2) and higher stability up to 3000 cyclic voltammetry (CV) cycles. The chronoamperometry (CA) results also revealed 12 h stability. The electric double-layer capacitance of (EDLC, C-dl) of 3.5 mFcm(-2) and specific capacitance retention (%) for 12000 CV cycles reveal that the synthesized material is a promising low-cost candidate for electrode fabrication. The study also predicts a path of plastic waste utilization to get the useful product from waste plastics through an environment friendly route.