Facile Synthesis of Monodisperse Copper-Platinum Alloy Nanoparticles and Their Superb Catalysis in the Hydrolytic Dehydrogenation of Ammonia Borane and Hydrazine Borane
Facile Synthesis of Monodisperse Copper-Platinum Alloy Nanoparticles and Their Superb Catalysis in the Hydrolytic Dehydrogenation of Ammonia Borane and Hydrazine Borane
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DOI：
10.1002/cctc.201701023
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发表时间：
2017-11-23
期刊：
影响因子：
4.5
通讯作者：
Metin, Onder
中科院分区：
文献类型：
--
作者：
Karaca, Tugba;Sevim, Melike;Metin, Onder
在众多的化学储氢材料中，B-N-H化合物，尤其是氨硼烷（AB）和肼硼烷（HB），因其优异的性能而成为最有潜力的储氢材料。然而，从这些化合物中以有效和可控的方式产生氢气是开发新的催化体系所必需的。本文报道了一种新的纳米催化剂--Ketjen Black负载的单分散CuPt合金纳米颗粒（KB-CuPt）的湿化学合成方法，该催化剂在室温下对AB和HB的水解脱氢反应表现出前所未有的催化活性，其初始转化频率（TOF）分别为859和832 molH（2）mol（Pt）（-1）min（-1）。报道的TOF值是在迄今为止在两种水解反应中测试的所有Pt基催化剂中记录的。本研究还包括详细的动力学KB-Cu 68 Pt 32催化水解脱氢AB和HB的各种参数的研究。
Among the all emergent chemical hydrogen-storage materials, B-N-H compounds, especially ammonia borane (AB) and hydrazine borane (HB), appear to be the most favorable ones owing to their advantageous features. However, hydrogen generation from these compounds in an efficient and controllable way is required for the development of new catalytic systems. We report herein a facile wet-chemical synthesis of a new nanocatalyst, namely, monodisperse CuPt alloy nanoparticles (NPs) supported on Ketjen Black (KB-CuPt), that exhibits unprecedented catalytic activity in the hydrolytic dehydrogenation of AB and HB with initial turnover frequencies (TOF) of 859 and 832molH(2) mol(Pt)(-1)min(-1), respectively, under ambient conditions. The reported TOF values are record among all Pt-based catalysts that have been tested in both hydrolysis reactions hitherto. This study also includes detailed kinetics of the KB-Cu68Pt32-catalyzed hydrolytic dehydrogenation of both AB and HB studied on a variety of parameters.