A novel liquid organic hydrogen carrier system based on catalytic peptide formation and hydrogenation.
A novel liquid organic hydrogen carrier system based on catalytic peptide formation and hydrogenation.
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DOI：
10.1038/ncomms7859
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发表时间：
2015-04-17
影响因子：
16.6
通讯作者：
Milstein D
中科院分区：
文献类型：
--
作者：
Hu P;Fogler E;Diskin-Posner Y;Iron MA;Milstein D
氢是一种有效的绿色燃料，但在高压或低温下储存时，其低能密度和安全问题呈现出明显的缺点。因此，寻找高效且安全的氢载体是一个主要挑战。特别感兴趣的是液体有机氢载体（LOHC），可以容易加载和卸载大量氢。但是，缺点包括高氢压需求，需要不同的催化剂和高LOHC成本的氢化和脱氢步骤的高反应温度。在这里，我们使用廉价，安全且丰富的有机化合物，具有储存和释放氢的潜力较高的能力，在相对较小的条件下施加了相同的催化剂，它使用具有较高潜在储存和释放氢的潜在能力的廉价，安全和丰富的有机化合物，呈现出易于可逆的LOHC系统。提供了催化反应的机械见解。我们认为，这些发现可能导致廉价，安全，清洁的液体氢载体系统的发展。
氢是一种潜在的燃料来源，但是当在压力和潜在安全问题下存储时，其低能密度会带来问题。在这里，作者报告了一种廉价，丰富的有机液体，可以通过形成环状肽来产生氢，并在氢化后催化再生。
Hydrogen is an efficient green fuel, but its low energy density when stored under high pressure or cryogenically, and safety issues, presents significant disadvantages; hence finding efficient and safe hydrogen carriers is a major challenge. Of special interest are liquid organic hydrogen carriers (LOHCs), which can be readily loaded and unloaded with considerable amounts of hydrogen. However, disadvantages include high hydrogen pressure requirements, high reaction temperatures for both hydrogenation and dehydrogenation steps, which require different catalysts, and high LOHC cost. Here we present a readily reversible LOHC system based on catalytic peptide formation and hydrogenation, using an inexpensive, safe and abundant organic compound with high potential capacity to store and release hydrogen, applying the same catalyst for loading and unloading hydrogen under relatively mild conditions. Mechanistic insight of the catalytic reaction is provided. We believe that these findings may lead to the development of an inexpensive, safe and clean liquid hydrogen carrier system. Hydrogen is a potential fuel source, but its low energy density when stored under pressure and potential safety issues present problems. Here, the authors report a cheap, abundant organic liquid which can generate hydrogen by formation of a cyclic peptide and be catalytically regenerated upon hydrogenation.