Mechanistic Insight into Size-Dependent Activity and Durability in Pt/CNT Catalyzed Hydrolytic Dehydrogenation of Ammonia Borane
Mechanistic Insight into Size-Dependent Activity and Durability in Pt/CNT Catalyzed Hydrolytic Dehydrogenation of Ammonia Borane
复制标题
Pt/CNT 催化氨硼烷水解脱氢中尺寸依赖性活性和耐久性的机理见解
DOI：
10.1021/ja509778y
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发表时间：
2014-12-03
影响因子：
15
通讯作者：
Yuan, Weikang
中科院分区：
文献类型：
--
作者：
Chen, Wenyao;Ji, Jian;Yuan, Weikang
我们报告了 Pt/CNT 催化氨硼烷水解脱氢的尺寸依赖性活性。动力学研究和模型计算表明，Pt(111) 面是主要的催化活性表面。优化的 Pt 颗粒尺寸为 ca。 1.8纳米。同时，发现催化剂耐久性对 Pt 粒径高度敏感。较小的 Pt 颗粒似乎具有较低的耐用性，这可能与 Pt 表面上含 B 物质的吸附更显着以及 Pt 颗粒尺寸和形状更容易变化有关。这里报道的见解可能为合理设计高活性和耐用的制氢铂催化剂铺平道路。
We report a size-dependent activity in Pt/CNT catalyzed hydrolytic dehydrogenation of ammonia borane. Kinetic study and model calculations revealed that Pt(111) facet is the dominating catalytically active surface. There is an optimized Pt particle size of ca. 1.8 nm. Meanwhile, the catalyst durability was found to be highly sensitive to the Pt particle size. The smaller Pt particles appear to have lower durability, which could be related to more significant adsorption of B-containing species on Pt surfaces as well as easier changes in Pt particle size and shape. The insights reported here may pave the way for the rational design of highly active and durable Pt catalysts for hydrogen generation.