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

作　　者：Han Wu Min Wu Boyang Wang Xue Yong Yushan Liu Baojun Li Baozhong Liu Siyu Lu 

机构地区：[1]College of Chemistry,Zhengzhou University,Zhengzhou 450001,Henan,China [2]College of Chemistry and Chemical Engineering,Henan Polytechnic University,Jiaozuo 454000,Henan,China [3]College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,Zhejiang,China [4]Department of Physics and Engineering Physics,University of Saskatchewan,Saskatoon S7N5E2,Canada

出　　处：《Journal of Energy Chemistry》2020年第9期43-53,I0002,共12页能源化学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(21774041 and 51433003);the China Postdoctoral Science Foundation(2018M640681 and 2019T120632)。

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 Co-Co3O4 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.

关 键 词：Ammonia borane Hydrogen evolution Co-Co3O4 interface Carbon dots Nanoparticles 

分 类 号：TQ116.2[化学工程—无机化工] TQ426