Hydrogen generation from the hydrolysis of ammonia borane (AB) over heterogeneous catalysts is essential for practical applications. Herein, efficient hydrogen evolution from AB hydrolysis over the carbon-supported Rh nanoparticles synthesized with sodium citrate (Rh/C-SC) was achieved at 25 °C. The turnover frequency value of Rh/C-SC was 336 mol H₂ (mol_Rh min)⁻¹, whereas that of Rh/C catalyst only yielded a value of 134 mol H₂ (mol_Rh min)⁻¹. The improvement of the catalytic performance of Rh/C-SC catalyst could be attributed to the small Rh particles with highly active surface areas, which were prepared by using sodium citrate as the stabilizing agent. This result indicates that sodium citrate can be applied as a useful stabilizing agent for synthesizing active metal nanoparticles, thus highly promoting the practical application of AB system for fuel cells.

在实际应用中，氨硼烷（AB）在非均相催化剂上的水解产生氢是必不可少的。在此，在25°C下实现了AB水解在由柠檬酸钠（Rh / C-SC）合成的碳载Rh纳米颗粒上的有效氢分解。Rh / C-SC的周转频率值为336 mol H ₂（mol _Rh  min）^-1，而Rh / C催化剂的周转频率值仅为134 mol H ₂（mol _Rh  min）^-1。Rh / C-SC催化剂的催化性能的提高可归因于使用柠檬酸钠作为稳定剂制备的具有高活性表面积的小Rh颗粒。该结果表明柠檬酸钠可以用作合成活性金属纳米颗粒的有用的稳定剂，从而极大地促进了AB系统在燃料电池中的实际应用。