Ruthenium (Ru) is one of the most attractive catalysts in the hydrolytic dehygrogenation of ammonia borane. So far, the employed Ru-based catalysts are mainly focusing on hexagonal close packed structured Ru. In this work, we study the crystal phase effect of Ru on the hydrolytic dehygrogenation of ammonia borane, using face-centered cubic structured and hexagonal close packed structured Ru nanoparticles supported on γ-Al₂O₃. The results show that the catalytic activity is different even these two kinds of Ru nanoparticles hold similar size. Impressively, with the Ru particle size change, the variation trend of activity is opposite for face-centered cubic and hexagonal close packed structured Ru/γ-Al₂O₃. Finally, some possible reasons for their difference are proposed based on density functional theory calculations.

钌（Ru）是氨硼烷水解脱湿中最具吸引力的催化剂之一。迄今为止，所使用的Ru基催化剂主要集中在六方密堆积结构化Ru上。在这项工作中，我们研究了氨硼烷的水解dehygrogenation茹的晶相的效果，使用的面心立方结构和密排六方结构支撑在γ-Al系的Ru纳米颗粒₂ ö ₃。结果表明，即使这两种Ru纳米颗粒具有相似的尺寸，其催化活性也不同。令人印象深刻，与汝粒径变化，活性的变化趋势为面心立方和六方密相反挤得结构的Ru /γ-Al系₂ ö ₃。最后，基于密度泛函理论计算，提出了造成这种差异的一些可能原因。