Pt-M alloy nanoparticles (NPs) with well-defined size and compositions exhibit dramatically catalytic performance in chemical reactions. In this work, monodisperse PtCu NPs with controlled size and compositions were synthesized by the co-reduction method in the presence of oleylamine. These NPs have excellent catalytic activities in the hydrolytic dehydrogenation of ammonia borane (AB) and their activities were composition dependent. Among the different-composition PtCu NPs, the Cu₅₀Pt₅₀ NPs exhibit the highest catalytic activity with an initial turnover frequency of 102.5 mol_(hydrogen)·mol_(catalyst)⁻¹·min⁻¹ and an apparent activation energy of 36 kJ·mol⁻¹, which demonstrate the validity of partly replacing Pt by a first-row transition metal on constructing high performance heterogeneous nanocatalysts for the hydrolytic dehydrogenation of AB.

具有明确定义的尺寸和组成的Pt-M合金纳米颗粒（NPs）在化学反应中显示出显着的催化性能。在这项工作中，在油胺存在下，通过共还原法合成了具有可控尺寸和组成的单分散PtCu NP。这些NP在氨硼烷（AB）的水解脱氢中具有出色的催化活性，并且它们的活性取决于组成。在不同组成的PtCu NP中，Cu ₅₀ Pt ₅₀ NPs表现出最高的催化活性，初始周转频率为102.5 mol _（氢） ·mol _{（催化剂）}^-1 ·min ^-1和表观活化能为36 kJ·摩尔^-1，这证明了用第一行过渡金属部分取代Pt在构建AB水解脱氢的高性能多相纳米催化剂方面的有效性。