From PET Bottles Waste to N-Doped Graphene as Sustainable Electrocatalyst Support for Direct Liquid Fuel Cells
| Autor: | Noha A. Elessawy, Gordana Backović, Janesuda Hirunthanawat, Marta Martins, Lazar Rakočević, Marwa H. Gouda, Arafat Toghan, Mohamed E. Youssef, Biljana Šljukić, Diogo M. F. Santos |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
PET bottles waste
SODIUM-BOROHYDRIDE PLATINUM Science & Technology Chemistry Physical ELECTRODES Pt-based electrocatalyst OXIDE PERFORMANCE direct liquid fuel cells NANOCOMPOSITE Catalysis Chemistry Physical Sciences graphene-based electrocatalyst NANOPARTICLES borohydride oxidation AU Physical and Theoretical Chemistry ANODE nitrogen-doped graphene BOROHYDRIDE OXIDATION REACTION General Environmental Science |
| Zdroj: | Catalysts Volume 13 Issue 3 Pages: 525 |
| Popis: | Direct liquid fuel cells represent one of the most rapidly emerging energy conversion devices. The main challenge in developing fuel cell devices is finding low-cost and highly active catalysts. In this work, PET bottle waste was transformed into nitrogen-doped graphene (NG) as valuable catalyst support. NG was prepared by a one-pot thermal decomposition process of mineral water waste bottles with urea at 800 °C. Then, NG/Pt electrocatalysts with Pt loadings as low as 0.9 wt.% and 1.8 wt.% were prepared via a simple reduction method in aqueous solution at room temperature. The physical and electrochemical properties of the NG/Pt electrocatalysts are characterized and evaluated for application in direct borohydride peroxide fuel cells (DBPFCs). The results show that NG/Pt catalysts display catalytic activity for borohydride oxidation reaction, particularly the NG/Pt_1, with a number of exchanged electrons of 2.7. Using NG/Pt composite in fuel cells is anticipated to lower prices and boost the usage of electrochemical energy devices. A DBPFC fuel cell using NG/Pt_1 catalyst (1.8 wt.% Pt) in the anode achieved a power density of 75 mW cm−2 at 45 °C. The exceptional performance and economic viability become even more evident when expressed as mass-specific power density, reaching a value as high as 15.8 W mgPt−1. |
| Databáze: | OpenAIRE |
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