Monodisperse AgPd alloy nanoparticles as a highly active catalyst towards the methanolysis of ammonia borane for hydrogen generation
Monodisperse AgPd alloy nanoparticles as a highly active catalyst towards the methanolysis of ammonia borane for hydrogen generation
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单分散AgPd合金纳米粒子作为氨硼烷甲醇分解制氢的高活性催化剂
DOI：
10.1039/c6ra21691a
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发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Li, Qingbiao
中科院分区：
文献类型：
--
作者：
Sun, Daohua;Li, Pengyao;Li, Qingbiao
在油胺存在下，通过共还原银银和氯化钯，成功地合成了单分散的AgPd纳米粒子（NPs）。表征技术，如透射电子显微镜，能量色散X-射线光谱，和X-射线衍射被用来验证所获得的纳米颗粒的合金性质。这些载于碳上的AgPd纳米颗粒被发现是用于在室温下由氨硼烷的甲醇分解产生氢气的活性催化剂。催化活性取决于合金组成，Ag 30 Pd 70 NPs在测试的催化剂中显示出最大的活性，具有非常高的总转换频率值366.4 min-1和活化能37.5 kJ mol-1。在可重复使用性测试中，Ag 30 Pd 70/C催化剂在8次循环后保持其初始活性的67%和100%的转化率。
Monodisperse AgPd nanoparticles (NPs) were successfully synthesized by coreducing silver nitrate and palladium chloride in the presence of oleylamine. Characterization techniques such as transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction were employed to verify the alloy nature of the obtained NPs. These AgPd NPs, supported on carbon, were found to be active catalysts for the generation of hydrogen from the methanolysis of ammonia borane at room temperature. The catalytic activity depended on the alloy composition, and the Ag30Pd70 NPs displayed the greatest activity among the tested catalysts, with a very high total turnover frequency value of 366.4 min−1 and activation energy of 37.5 kJ mol−1. In a reusability test, the Ag30Pd70/C catalyst retained 67% of its initial activity and 100% conversion after eight cycles.