H₂ was released from ammonia borane (AB) through a hydrolysis reaction over several Co-SBA-15 catalysts. Each catalyst had an induction time prior to becoming active. The activation time related to the in-situ reduction of Co species to an active nano-particulate form and the length of this induction time varied as a function of the Co-precursor used. The rate of the hydrolysis reaction over the reduced and active catalysts depended on the precursor. While the induction time was not noted in subsequent reactions over the reduced catalysts, the reactivity differences remained. A rationale for the differences based on the preparation steps is suggested.

中文翻译：

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NH ₃ BH ₃水解中的Co-SBA-15催化剂– Co前体和催化剂预处理的影响

在几种Co-SBA-15催化剂上通过水解反应从氨硼烷（AB）中释放出H ₂。每种催化剂在变为活性之前均具有诱导时间。活化时间与Co物种就地还原为活性纳米颗粒形式有关，该诱导时间的长度随所使用的Co前驱体而变化。在还原的和活性的催化剂上的水解反应速率取决于前体。尽管在还原的催化剂上的后续反应中未注意到诱导时间，但仍保留了反应性差异。建议基于准备步骤的差异的理由。