Interface electron collaborative migration of Co-Co3O4/carbon dots:Boosting the hydrolytic dehydrogenation of ammonia borane

• 作者: Baojun Li Baozhong Liu Boyang Wang Han Wu Min Wu Siyu Lu Xue Yong Yushan Liu
• 来源期刊: 能源化学
• 年，卷（期）: 2020,（9）
• 页码范围: 43-53
• 页数: 11页
• 语种: 英文

摘要

Ammonia borane (AB) is an excellent candidate for the chemical storage of hydrogen.However,its practical utilization for hydrogen production is hindered by the need for expensive noble-metal-based catalysts.Herein,we report C0-C03O4 nanoparticles (NPs) facilely deposited on carbon dots (CDs) as a highly efficient,robust,and noble-metal-free catalyst for the hydrolysis of AB.The incorporation of the multiinterfaces between Co,Co3O4 NPs,and CDs endows this hybrid material with excellent catalytic activity (rB =6816 mLH2 min-1 gCo-1) exceeding that of previous non-noble-metal NP systems and even that of some noble-metal NP systems.A further mechanistic study suggests that these interfacial interactions can affect the electronic structures of interfacial atoms and provide abundant adsorption sites for AB and water molecules,resulting in a low energy barrier for the activation of reactive molecules and thus substantial improvement of the catalytic rate.