In this paper, ruthenium supported on nitrogen-doped porous carbon (Ru/NPC) catalyst is synthesized by a simple method of in situ reduction using ammonia borane (AB) as reducing agent. The composition and structure of Ru/NPC catalyst are systematically characterized. This catalyst can efficiently catalyze the hydrolysis of AB. The hydrogen production reaction is completed within about 90 s at a temperature of 298 K and the maximum rate of hydrogen production is 3276 ml.s(-1).g(-1) with a reduced activation energy of 24.95 kJ.mol(-1). The turnover frequency (TOF) for hydrogen production is about 813 mol(H2)center dot mol(Ru)(-1).min(-1). Moreover, this catalyst can be recycled with a well-maintained performance. After five cycles, the maximum rate of hydrogen generation is maintained at 2206 ml.s(-1).g(-1), corresponding to 67.3% of the initial catalytic activity. Our results suggest that Ru/NPC prepared by in situ reduction is a highly efficient catalyst for hydrolytic dehydrogenation of AB. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.