Mechanistic Insight into Size-Dependent Activity and Durability in Pt/CNT Catalyzed Hydrolytic Dehydrogenation of Ammonia Borane,Journal of the American Chemical Society

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Mechanistic Insight into Size-Dependent Activity and Durability in Pt/CNT Catalyzed Hydrolytic Dehydrogenation of Ammonia Borane
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2014-11-21 , DOI: 10.1021/ja509778y
Wenyao Chen ₁ , Jian Ji ₁ , Xiang Feng ₁ , Xuezhi Duan ₁ , Gang Qian ₁ , Ping Li ₁ , Xinggui Zhou ₁ , De Chen ₂ , Weikang Yuan ₁

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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.

中文翻译：

铂/碳纳米管催化氨硼烷水解脱氢的尺寸依赖性活性和耐久性的机理洞察

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。有一个优化的 Pt 颗粒尺寸。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久性，这可能与含 B 物质在 Pt 表面上更显着的吸附以及 Pt 颗粒尺寸和形状的更容易变化有关。这里报告的见解可能为合理设计用于制氢的高活性和耐用 Pt 催化剂铺平道路。

更新日期：2014-11-21

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