Eco-friendly nanocatalysts for hydrogen generation via sodium borohydride hydrolysis and enhanced fuel cell applications
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Dosyalar
Tarih
2025-04
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier BV
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Sodium borohydride (NaBH4) hydrolysis is a promising method for sustainable hydrogen production, but its efficiency depends on high-performance and eco-friendly catalysts. This study introduces a green hydrothermal synthesis using tobacco stem extract to fabricate Co–Sb nanoparticles, reducing toxic chemical usage compared to conventional methods. Catalytic tests confirm their high efficiency in NaBH4 hydrolysis, with hydrogen generation increasing at higher temperatures and NaOH/NaBH4 concentrations. Structural analyses (XRD, FT-IR, SEM, TEM) reveal an amorphous, porous morphology with spherical particles (∼20–30 nm). Co–Sb nanoparticles achieve a hydrogen generation rate of 5618 mlmin−1g−1, surpassing Co nanoparticles (5360 mlmin−1g−1), with lower activation energy (30.9 kJ mol−1 vs. 35.5 kJ mol−1), highlighting Co–Sb's superior catalytic efficiency—additionally, 1 wt% Sb doping enhances hydrogen production and improves PEM fuel cell performance, reaching a peak power density of 137.3 mW/cm2. However, reusability tests of the Co–Sb catalyst revealed a decline in the hydrogen generation rate, indicating catalyst deactivation due to oxidation on active surfaces and the accumulation of by-products. Furthermore, excessive Sb doping was found to block active sites on the catalyst surface, thereby reducing its efficiency. This study underscores the viability of green-synthesized Co–Sb nanoparticles for hydrogen generation and fuel cell applications, offering a sustainable alternative to energy technologies.
Açıklama
Anahtar Kelimeler
Co–Sb, Extract, Green synthesis, Hydrolysis, Nanoparticles
Kaynak
International Journal of Hydrogen Energy
WoS Q Değeri
Scopus Q Değeri
Q1
