Hydrolytic dehydrogenation of ammonia borane is a significant and promising approach for on-site hydrogen production at ambient conditions, and developing highly efficient and low-cost catalysts has attracted considerable attention. Herein, waste-biomass-derived activated carbon (AC) was prepared by hydrothermal carbonization and alkali-assisted activation, and non-precious bimetal phosphides (Co-Cu-P) nanocatalysts with a series of different Co/Cu ratios were synthesized on the AC surface through in situ phosphidation method. Owing to the synergetic effects, the optimal Co0.8Cu0.2P/AC presents an outstanding turnover frequency of 26.5 min-1 (25 °C), which is much higher than that of many reported catalysts. The reaction activation energy was measured to be 34.6 kJ mol-1. Benefiting from the ferromagnetic nature of the phosphides, the Co0.8Cu0.2P/AC can be magnetically separated and reused again. After recycling six times, the catalyst still retains 72% of the initial activity, thus indicating great potential for practical applications.

中文翻译：

---

废弃生物质衍生的活性炭负载 Co-Cu-P 纳米催化剂，用于氨硼烷的水解脱氢。


氨硼烷水解脱氢是常温下现场制氢的一种重要且有前景的方法，开发高效、低成本的催化剂引起了人们的广泛关注。本文通过水热碳化和碱辅助活化的方法制备了废生物质活性炭（AC），并在其上合成了一系列不同Co/Cu比的非贵重双金属磷化物（Co-Cu-P）纳米催化剂。 AC表面通过原位磷化方法。由于协同效应，最佳Co0.8Cu0.2P/AC具有26.5 min-1 (25 °C)的出色周转频率，远高于许多报道的催化剂。测得反应活化能为34.6 kJ mol-1。受益于磷化物的铁磁性质，Co0.8Cu0.2P/AC 可以通过磁力分离并再次重复使用。经过六次循环使用后，该催化剂仍保留了72%的初始活性，具有巨大的实际应用潜力。