Development of magnetic Rh0 nanoparticles decorated on the quaternary hybrid composite (Fe3O4-ZnO-Mn3O4-rGO) for the dehydrogenation of ammonia-borane in methanol
Inorganic Chemistry Communications, cilt.192, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 192
- Basım Tarihi: 2026
- Doi Numarası: 10.1016/j.inoche.2026.117396
- Dergi Adı: Inorganic Chemistry Communications
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Chimica, DIALNET
- Anahtar Kelimeler: Ammonia-borane, Catalysis, Hybrid composite, Hydrogen, Methanolysis, Rhodium
- Van Yüzüncü Yıl Üniversitesi Adresli: Evet
Özet
Chemical hydrogen storage using boron-nitrogen compounds is a promising approach for on-demand hydrogen generation. Ammonia-borane (AB) has attracted considerable interest due to its high hydrogen content and favorable physicochemical properties. Methanolysis of AB offers several advantages over hydrolysis, including better solubility, ammonia-free hydrogen release, and efficient operation at low temperatures.In this study, magnetically separable Rh0 NPs supported on a Fe₃O₄–ZnO–Mn₃O₄–rGO hybrid composite were synthesized via a wet chemical method and characterized by SEM, TEM, XRD, FT-IR, XPS, BET, ICP-OES, and VSM analyses. For the first time, the catalyst was evaluated in the methanolysis of AB and gave a turnover frequency of 422H₂ mol−1 catalyst min−1 at room temperature. The apparent activation parameters were determined as Ea = 31.4 kJ mol−1, ΔH# = 28.2 kJ mol−1, and ΔS# = −114.4 J mol−1 K−1. The catalyst maintained high activity over several reuse cycles, although slight nanoparticle agglomeration was observed after repeated use. These findings suggest that the Rh0@Fe₃O₄–ZnO–Mn₃O₄–rGO catalyst may be a promising candidate for hydrogen generation through AB methanolysis.