PtAuCo Trimetallic Nanoalloys as Highly Efficient Catalysts toward Dehydrogenation of Ammonia Borane
PtAuCo Trimetallic Nanoalloys as Highly Efficient Catalysts toward Dehydrogenation of Ammonia Borane
复制标题
PtAuCo 三金属纳米合金作为氨硼烷脱氢的高效催化剂
DOI：
10.1021/acssuschemeng.9b06865
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发表时间：
2020-03-09
影响因子：
8.4
通讯作者：
Zhai, Jin
中科院分区：
文献类型：
--
作者：
Fu, Lu-Lu;Zhang, Dong-Feng;Zhai, Jin
在本文中，我们成功地采用顺序消化还原策略制备了具有单相结构的PtAuCo三金属纳米合金。制备的PtAuCo三金属纳米合金对氨硼烷（NH3BH3； AB）的催化脱氢表现出组分依赖的催化性能，其中Pt76Au12Co12纳米合金为最优纳米合金。在室温下，Pt76Au12Co12纳米催化剂的周转频率（TOF）值高达450 (mol H-2 min（-1) （mol金属）（-1）），高于大多数已报道的贵金属基催化剂。动力学研究表明，Pt76Au12Co12催化AB水解为一级反应，活化能低至18.47 kJ mol（-1）。基于XPS和ICP测量，认为修饰后的电子相互作用是优化Pt76Au12Co12纳米合金催化活性的关键因素。
In this paper, we successfully achieved PtAuCo trimetallic nanoalloys with a single phase structure using a sequential digestive-reduction strategy. The as-prepared PtAuCo trimetallic nanoalloys exhibit composition-dependent catalytic performance toward catalytic dehydrogenation of ammonia borane (NH3BH3; AB) with the Pt76Au12Co12 nanoalloy as the optimized one. The turnover frequency (TOF) value of the Pt76Au12Co12 nanocatalyst is as high as 450 (mol H-2 min(-1) (mol metal)(-1)) at room temperature, which is higher than most of the reported noble-metal-based catalysts. Kinetic studies demonstrate that the catalytic hydrolysis of AB with Pt76Au12Co12 as the catalyst is of first-order with an activation energy as low as 18.47 kJ mol(-1). On the basis of the XPS and ICP measurement, the modified electronic interaction is believed to play the key role for the optimized catalytic activity of the Pt76Au12Co12 nanoalloy.