Nickel-based bimetallic nanocatalysts in high-extent dehydrogenation of hydrazine borane
Nickel-based bimetallic nanocatalysts in high-extent dehydrogenation of hydrazine borane
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DOI：
10.1016/j.ijhydene.2012.03.054
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发表时间：
2012-06-01
影响因子：
7.2
通讯作者：
Miele, Philippe
中科院分区：
文献类型：
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作者：
Cakanyildirim, Cetin;Demirci, Umit B.;Miele, Philippe
肼硼烷N2H4BH3（HB）是一种很有前途的化学储氢材料，但其发展高度依赖于用于脱氢的催化剂，即水解BH3基团，然后选择性地将N2H4部分分解为H-2和N-2。因此，寻找反应性和选择性催化剂至关重要。这是本工作的主题，我们主要关注使用十六烷基三甲基溴化铵辅助共还原法（硼氢化钠或氨硼烷作为还原剂）合成的镍基双金属纳米颗粒。第二种金属的含量为0.03至0.23mol%，选择为钌、铑、铂和铱。制备的49种纳米催化剂，结果存在差异；每摩尔 HB 的 H-2 + N-2 摩尔数从 3.1 到 5.1 不等。然后通过 XRD、TEM 和 XPS 对最佳双金属系统进行表征。我们的主要结果在本文中进行了报告和讨论。版权所有 (C) 2012，Hydrogen Energy Publications, LLC。由爱思唯尔有限公司出版。保留所有权利。
Hydrazine borane N2H4BH3 (HB) is a promising chemical hydrogen storage material but its development is highly dependent on the catalyst that will be used to dehydrogenate it, that is, to hydrolyze the BH3 group and then to decompose selectively the N2H4 moiety into H-2 and N-2. Finding a reactive and selective catalyst is thus crucial. This is the topic of the present work, where we mainly focused on nickel-based bimetallic nanoparticles synthesized using a hexadecyltrimethylammonium bromide-aided co-reduction method (sodium borohydride or ammonia borane as reducing agent). The second metal, in amounts from 0.03 to 0.23 mol%, was chosen to be ruthenium, rhodium, platinum and iridium. With the 49 nanocatalysts prepared, discrepant results were found; the mol number of H-2 + N-2 per mol of HB varied from 3.1 to 5.1. The best bimetallic systems were then characterized by XRD, TEM, and XPS. Our main results are reported and discussed herein. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.