Preparation and characterization of amine-terminated delafossite type oxide,CuMnO2–NH2, supported Pd (0) nanoparticles for the H2 generation from the methanolysis of ammonia-borane

Among the cuprous metal oxides of the delafossite type, which are generally formulated as CuMO₂ (M = Al, Cr, Fe, Ga, Mn), the most promising is the CuMnO₂ structures. CuMnO₂ material, named crednerite, is a very interesting delafossite derivative with potential applications in many fields, mainly catalyst, photoelectrochemical cells and multiferroic tools. Herein, we report fabrication, characterization, and application of amine-terminated CuMnO₂ (CuMnO₂–NH₂) supported palladium nanoparticles (Pd/CuMnO₂–NH₂) as highly efficient and recyclable catalysts for the hydrogen production from the methanolysis of ammonia-borane (AB). The results of characterization using P-XRD, TEM, HRTEM, TEM-EDX, XPS, SEM, SEM-elemental mapping, and ICP-OES disclose that Pd (0) nanoparticles were well spread on the surface of CuMnO₂–NH₂ with a mean particle size of 3.91 ± 0.33 nm. Pd/CuMnO₂–NH₂ shows high catalytic activity in the methanolysis of AB with an initial turnover frequency of 146.68 min^?1 at 25 ± 0.1 °C which is one of the highest values ever reported for AB methanolysis in the literature. Besides, the extreme stability of Pd/CuMnO₂–NH₂ takes it a recyclable heterogeneous catalyst in this catalytic conversion.