Rh nanoparticles supported on graphene as efficient catalyst for hydrolytic dehydrogenation of amine boranes for chemical hydrogen storage. (12th January 2015)

• Record Type: Journal Article
• Authors: Shen, Junfeng; Yang, Lan; Hu, Kai; Luo, Wei; Cheng, Gongzhen
• Is Part Of: International journal of hydrogen energy. Volume 40:Number 2(2015)
• Page Start: 1062
• Page End: 1070
• Publication Date: 2015-01-12
• Subjects: Rh nanoparticles -- Amine borane -- Graphene -- Hydrolysis -- Hydrogen storage; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2014.11.031
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Well dispersed 2.4 nm Rh nanoparticles (NPs) supported on graphene have been synthesized via a one-step in situ procedure by using methylamine borane (MeAB) as the reducing agent. Compared with other conventional supports, such as carbon black, SiO2, γ -Al2 O3, and the physical mixture of Rh and graphene, the as-prepared Rh NPs supported on graphene exhibit superior catalytic activity towards the hydrolysis of ammonia borane. Kinetic studies of catalytic hydrolysis of amine boranes indicate that the as-synthesized Rh/graphene is first order with respect to Rh concentration. Among all the reported Rh-based catalysts, the Rh/graphene exhibits the highest turnover frequency (TOF) values of 325 and 146 min −1, the lowest activation energy (Ea) values of 19.7 and 16.4 kJ/mol, toward hydrolysis of ammonia borane (AB) and MeAB, respectively. Highlights: One-step synthesis of graphene supported Rh NPs. The catalysts exhibit excellent catalytic activity. The catalysts show good durable stability.