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首页> 美国卫生研究院文献>Nanomaterials >Hexagonal CuCo2O4 Nanoplatelets a Highly Active Catalyst for the Hydrolysis of Ammonia Borane for Hydrogen Production
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Hexagonal CuCo2O4 Nanoplatelets a Highly Active Catalyst for the Hydrolysis of Ammonia Borane for Hydrogen Production

机译：六角形CuCo2O4纳米片高活性的氨硼烷水解制氢催化剂

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Catalytic hydrolysis of ammonia borane (AB) has been considered as an effective and safe method to generate hydrogen. Development of highly active and low-cost catalysts is one of the key tasks for this technology. In this work, hexagonal CuCo2O4 nanoplatelets with a thickness of approximately 55 nm were prepared. In AB hydrolysis, those nanoplatelets exhibited ultrahigh catalytic activity with turnover frequency (TOF) of 73.4 molhydrogen min−1 molcat−1. As far as we know, this is one of the highest TOF values ever reported for non-noble metal catalysts. In addition, the effects of viscosity and different alkalis on the hydrolysis were also investigated. It is revealed that high viscosity of the reaction medium will retard the hydrolysis reaction. The presence of NaOH, KOH, and Na2CO3 in the reaction solution is favorable for hydrolytic process. In contrast, NH3·H2O will slow down the hydrolysis rate of ammonia borane. This work can provide some novel insight into the design of catalysts with both high performance and low cost. Besides, some findings in the present study can also offer us some information about how to improve the hydrolysis rates by optimizing the hydrolysis condition.
机译：氨硼烷（AB）的催化水解已被认为是产生氢的有效和安全的方法。高活性和低成本催化剂的开发是该技术的关键任务之一。在这项工作中，制备了厚度约为55 nm的六角形CuCo2O4纳米片。在AB水解中，这些纳米片具有超高的催化活性，其周转频率（TOF）为73.4 molhydrogen min -1 molcat -1 。据我们所知，这是有史以来针对非贵金属催化剂报道的最高TOF值之一。此外，还研究了粘度和不同碱对水解的影响。揭示了反应介质的高粘度将延迟水解反应。反应溶液中NaOH，KOH和Na2CO3的存在有利于水解过程。相反，NH3·H2O会减慢氨硼烷的水解速度。这项工作可以为高性能和低成本的催化剂设计提供一些新颖的见解。此外，本研究的一些发现还可以为我们提供一些有关如何通过优化水解条件来提高水解速率的信息。

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