ISOBAM-104 stabilized Fe colloidal catalysts were synthesized by in-situ reduction method for hydrogen generation from KBH₄ hydrolysis in alkaline solutions. The as-prepared non-noble metal colloidal catalysts contained Fe nanoparticles with an average size of around 1.9 nm as well as uniformly dispersed single Fe atoms, exhibiting a high catalytic activity of 8100 mL-H₂ min⁻¹ g-Fe⁻¹, which was higher than that of the Fe catalysts prepared by other protective agents. Such high catalytic activity of the as-synthesized Fe colloidal catalysts could be ascribed to the following two factors: (1) the in-situ formed and well-dispersed Fe atoms that were confirmed by HAADF-STEM, and (2) the superior protective ability of ISOBAM-104 compared with other protective agents, which was validated by a density functional theory (DFT). In addition, the apparent activation energy of Fe colloidal catalysts was 49.85 kJ mol⁻¹, which was in coincidence with DFT calculation results (49.7 kJ mol⁻¹) and lower than most other Fe-based catalysts, implying that the as-prepared Fe colloidal catalyst is a promising candidate for the catalytic hydrolysis of KBH₄. This study could provide a promising approach to prepare non-noble metal colloidal catalysts with excellent catalytic activity for hydrogen generation.

ISOBAM-104 稳定的铁胶体催化剂是通过原位还原法合成的，用于在碱性溶液中通过 KBH ₄水解产生氢气。所制备的非贵金属胶体催化剂含有平均尺寸约为 1.9 nm 的 Fe 纳米粒子以及均匀分散的单个 Fe 原子，表现出 8100 mL-H ₂ min ^-1 g-Fe ^-1的高催化活性，高于其他保护剂制备的 Fe 催化剂。合成的 Fe 胶体催化剂的如此高的催化活性可归因于以下两个因素：(1)原位HAADF-STEM 证实了形成且分散良好的 Fe 原子，以及 (2) ISOBAM-104 与其他保护剂相比具有优异的保护能力，这得到了密度泛函理论 (DFT) 的验证。此外，Fe 胶体催化剂的表观活化能为 49.85 k J mol ^-1，与 DFT 计算结果一致（49.7 k J mol ^-1），并且低于大多数其他 Fe 基催化剂，这意味着 as-制备的Fe胶体催化剂是KBH ₄催化水解的有希望的候选者。该研究为制备具有优异产氢催化活性的非贵金属胶体催化剂提供了一种有前景的方法。