Nickel Ferrite-Supported Palladium(0) Nanoparticles: Highly Active and Reusable Catalyst for Hydrogen Generation From the Hydrolysis of Ammonia Borane
Topics in Catalysis, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Basım Tarihi: 2026
- Doi Numarası: 10.1007/s11244-026-02299-w
- Dergi Adı: Topics in Catalysis
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, Academic Search Ultimate (EBSCO), Natural Science Collection (ProQuest), Biological Science Database (ProQuest), Engineering Source (EBSCO), Materials Science & Engineering Collection (ProQuest), Technology Collection (ProQuest)
- Anahtar Kelimeler: Ammonia borane, Dehydrogenation, Hydrogen storage, Magnetic catalyst, Nickel ferrite, Palladium nanoparticles
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
We report the development of a novel magnetically separable palladium(0) nanocatalyst for hydrogen generation from the hydrolysis of ammonia borane. Palladium(0) nanoparticles become magnetically separable when supported on the surface of magnetic nickel ferrite (NiFe2O4) nanospheres. The borohydride reduction of palladium(II) ions, impregnated on the nickel ferrite, yields the Pd0/NiFe2O4 nanoparticles which are easily separated from the reaction medium by an exterior magnet and characterized by a combination of advanced analytical techniques. The Pd0/NiFe2O4 nanocatalyst with a 0.25% wt. Pd content has highly dispersed Pd0 nanoparticles of ∼4 nm mean size on the surface of NiFe2O4 nanopowder. Pd0/NiFe2O4 nanoparticles are found to have superb activity providing a turnover frequency value of 2270 min− 1 in releasing dihydrogen (H2) from the hydrolysis of ammonia borane (AB) at 25.0 °C. Thanks to their magnetic isolability Pd0/NiFe2O4 nanoparticles also provide outstanding reusability as they retain the complete initial activity even after tenth run of hydrolysis of AB releasing 3 equivalent H2 gas per mole of AB; that is, 100% conversion. The high activity and outstanding stability of the magnetically isolable Pd0/NiFe2O4 nanoparticles are ascribed to the favorable interaction of palladium with the oxide surface of NiFe2O4, as elucidated by the X-ray Photoelectron Spectroscopy. The strong interaction of palladium with the oxide support can keep the nanoparticles tightly bound on the NiFe2O4 surface. More importantly, such a metal-support interaction facilitates the charge transfer from palladium nanoparticles to oxide surface, which causes a significant enhancement in catalytic activity.