Akademik Veri Yönetim Sistemi
International Journal of Hydrogen Energy, cilt.249, 2026 (SCI-Expanded, Scopus)
Boron–nitrogen–hydrogen (B–N–H) compounds are widely studied for solid-state hydrogen storage due to their high hydrogen capacities. Guanidine borohydride (GBH), with a gravimetric hydrogen content of 13.1 wt%, is a promising chemical hydrogen carrier. In this work, a Ru@nano-TiO2 catalyst, consisting of ruthenium nanoparticles supported on TiO2, was synthesized and thoroughly characterized. Although GBH is intrinsically stable against spontaneous hydrolysis, it released hydrogen rapidly and efficiently in the presence of the catalyst. Kinetic studies at varying temperatures gave an activation energy of 43.04 kJ/mol, activation enthalpy of 40.5 kJ/mol, and activation entropy of −81 J/mol×K, indicating a favorable reaction pathway. At room temperature, the catalyst exhibited an initial turnover frequency of 46.65 min−1. Additionally, Ru@nano-TiO2 showed strong resistance to sintering and high structural stability. Reusability tests confirmed that the catalyst preserved most of its activity after five cycles, achieving over 99% conversion, demonstrating its potential for efficient hydrogen generation.