Hydrogen Production from Morpholine−Borane by Aluminum Oxide‐Supported Pd Nanoparticles

Abstract

Morpholine−borane (MB) is a promising hydrogen storage material and developing effective catalysts for the catalytic hydrolysis reaction of MB has become a fascinating topic in catalysis. Here, we report the preparation of Al2O3‐supported Pd nanoparticles (Pd/Al2O3) by an impregnation‐reduction method and their utilization as catalysts in the catalytic hydrolysis reaction of MB for hydrogen (H2) production. These Pd/Al2O3 are characterized by a combination of several advanced analytical techniques. Pd/Al2O3 catalysts with a mean diameter of 3.12±0.35 nm provide H2 production with a turnover frequency (TOF) value of 495.3 mol(H2) ⋅ molPd−1 ⋅ h−1 in the hydrolysis of MB in complete conversion at 298 K. Additionally, the activation energy (Ea#), activation enthalpy (ΔH#), and activation entropy (ΔS#) values of Pd/Al2O3 catalysts in the hydrolysis reaction of MB are calculated as 30.36 kJ ⋅ mol−1, 28.42 kJ ⋅ mol−1, and −158.52 J ⋅ mol−1 ⋅ K−1, respectively, from Arrhenius and Eyring‐Polanyi equations.