Supported copper–copper oxide nanoparticles as active, stable and low-cost catalyst in the methanolysis of ammonia–borane for chemical hydrogen storage

摘要: Abstract The physical mixture of copper (Cu) copper(I) oxide (Cu 2 O) and copper(II) (CuO) nanoparticles supported on activated carbon (Cu–Cu O–CuO/C) were reproducibly prepared by a simple deposition-reduction technique without using any stabilizer in water at room temperature. characterization the resulting material ICP-OES, P-XRD, XPS, DR-UV/vis, BFTEM HRTEM techniques reveals that formation well-dispersed highly crystalline 3.8 ± 1.7 nm surface carbon. These Cu–Cu O–CuO employed as heterogeneous catalyst methanolysis ammonia–borane (NH 3 BH ), which has been considered one attractive materials for efficient storage hydrogen, under mild conditions. We found only 3.0 mol % O–CuO/C is enough to catalyze with high activity (TOF = 24 min −1 ) conversion (>99%) More importantly, exceptional stability against sintering leaching make recyclable ammonia–borane. retains >76% its initial 94% even 8th recycle complete conversion. study reported here also includes collection kinetic data catalyzed depending [Cu], substrate [NH ] concentrations temperature determine rate expression activation parameters ( E , Δ H # S catalytic reaction.