Rapid and robust hydrogen generation from sodium borohydride in optimum mixture of methanol and ethylene glycol using phosphorus-doped chitosan polymer matrix dispersed on alumina nanoparticles
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Tarih
2024
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Here, the highly efficient hydrogen (H-2) generation by sodium borohydride (NaBH4) in a novel synergistic mixture of methanol and ethylene glycol using phosphorus-doped chitosan polymer matrix incorporated on alumina particles was investigated. The efficiency of P-doped chitosan-alumina hybride catalyst for H-2 generation from NaBH4(NaBH4-HGR) in methanol, ethylene glycol, and methanol + ethylene glycol mixture showed significant differences. In particular, there is a very effective performance for NaBH4-HGR in a methanol + ethylene glycol mixture. The HGR values by mixture of methanol, ethylene glycol and methanol/ethylene glycol were 2342, 7364 and 13548 ml min(-1)g(-1), respectively. Moreover, the H-2 generation rate (HGR) value by NaBH4 using P-doped chitosan-alumina with the combination of methanol (8 ml) + ethylene glycol (2 ml) was 25,964 ml min(-1)g(-1). Also, activation energy (Ea) was 30.62 kJmol(-1). Additionally, the mechanism of H-2 release by NaBH4 solvolysis reactions in the methanol + ethylene glycol mixture using P-doped chitosan-alumina was evaluated. In the methanol + ethylene glycol mixture, both the low viscosity of methanol and the high acidity of ethylene glycol are likely to have a positive synergistic effect on H-2 production at the same time. Moreover, both the positivity of the P atoms and the increased acidity of the alumina become attractive to the negatively charged ions present in the reaction medium.
Açıklama
Anahtar Kelimeler
Methanol and ethylene glycol mixture, Phosphorus doping, Chitosan polymer matrix, Alumina nanoparticles, Sodium borohydride
Kaynak
Journal of Molecular Liquids
WoS Q Değeri
N/A
Scopus Q Değeri
Q1
Cilt
401
