Mechanistic Insight into Size-Dependent Activity and Durability in Pt/CNT Catalyzed Hydrolytic Dehydrogenation of Ammonia Borane

被引：303

作者：

Chen, Wenyao ^{[1
]}

Ji, Jian ^{[1
]}

Feng, Xiang ^{[1
]}

Duan, Xuezhi ^{[1
]}

Qian, Gang ^{[1
]}

Li, Ping ^{[1
]}

Zhou, Xinggui ^{[1
]}

Chen, De ^{[2
]}

Yuan, Weikang ^{[1
]}

机构：

[1] E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

[2] Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2014年 / 136卷 / 48期

关键词：

PARTICLE-SIZE; HYDROGEN GENERATION; HETEROGENEOUS CATALYSIS; PLATINUM NANOPARTICLES; PYRROLE HYDROGENATION; ELECTRONIC-PROPERTIES; PD; IMPACT; OXYGEN; DEACTIVATION;

D O I：

10.1021/ja509778y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：16736 / 16739

页数：4

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