Alumina nanofiber-stabilized ruthenium nanoparticles: Highly efficient catalytic materials for hydrogen evolution from ammonia borane hydrolysis. (21st September 2017)

• Record Type: Journal Article
• Authors: Hu, Min; Wang, Hua; Wang, Yi; Zhang, Yun; Wu, Jie; Xu, Bin; Gao, Daojiang; Bi, Jian; Fan, Guangyin
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 38(2017)
• Page Start: 24142
• Page End: 24149
• Publication Date: 2017-09-21
• Subjects: Ammonia borane -- Ruthenium -- Alumina nanofibers -- Hydrogen generation; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.08.051
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Effective catalysts for hydrogen generation from ammonia borane (AB) hydrolysis should be developed for the versatile applications of hydrogen. In this study, ruthenium nanoparticles (NPs) supported on alumina nanofibers (Ru/Al2 O3 -NFs) were synthesized by reducing the Ru(Ш) ions impregnated on Al2 O3 -NFs during AB hydrolysis. Results showed that the Ru NPs with an average size of 2.9 nm were uniformly dispersed on the Al2 O3 -NFs support. The as-synthesized Ru/Al2 O3 -NFs exhibited a high turnover frequency of 327 mol H2 (mol Ru min) −1 and an activation energy of 36.1 kJ mol −1 for AB hydrolysis at 25 °C. Kinetic studies showed that the AB hydrolysis catalyzed by Ru/Al2 O3 -NFs was a first-order reaction with regard to the Ru concentration and a zero-order reaction with respect to the AB concentration. The present work reveals that Ru/Al2 O3 -NFs show promise as a catalyst in developing a highly efficient hydrogen storage system for fuel cell applications. Highlights: Al2 O3 -NFs were selected as supports to synthesize Ru/Al2 O3 -NFs catalyst. Ru/Al2 O3 -NFs was investigated as catalyst for hydrolysis of ammonia borane. A high turnover frequency number of 327 mol H2 ·(mol Ru·min) −1 was achieved.