Nanosizing ammonia borane with nickel - An all-solid and all-in-one approach for H_2 generation by hydrolysis

摘要

Ammonia borane NH3BH3(AB) and nickel (Ni) have been considered together as anall-solidandall-in-onematerial for H2generation by hydrolysis at 20–50 °C. Our novel approach, denoted Ni/AB, consists of AB nanoparticles within a Ni matrix. Upon contact with water, Ni/AB readily hydrolyzes and liberates H2with a turnover frequency of 13.8 mol(H2) molNi−1min−1at 43.3 °C. The apparent activation energy, determined over the temperature range 23.5–50.4 °C, is low, with 19.5 ± 4.1 kJ mol−1. These results imply that such a Ni matrix embedding AB acts as an effective catalyst. Beyond the catalytic performance, this is the first report of the successful utilization of anall-solidandall-in-oneapproach for the hydrolysis of AB, and the work brings unique perspectives for one-shot catalytic systems.