Chitosan supported palladium nanoparticles: The novel catalysts for hydrogen generation from hydrolysis of ammonia borane

Journal Article · Sun Jul 15 00:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2018.03.013· OSTI ID:22805139

Chen, Xin ^[1]; Xu, Xiu-Juan ^[2]; Zheng, Xiu-Cheng; Guan, Xin-Xin; Liu, Pu ^[1]

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1. College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou, 450001 (China)
2. Key Laboratory of Tobacco Flavor Basic Research of CNTC, Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, 450001 (China)

Highlights: • Chitosan is used to anchor the in-situ reduced ultrafine palladium nanoparticles. • The Pd NPs/CS catalysts display superior catalytic behavior for H{sub 2} generation from AB. • The reaction kinetics over the catalysts is also studied in details. - Abstract: Chitosan supported palladium nanoparticles (Pd NPs/CS) catalysts were facilely prepared via an in-situ reduction of PdCl{sub 2} method and characterized by various techniques. The results showed that the palladium particles were in the range of 4–8 nm and evenly dispersed on chitosan. Furthermore, the resulting Pd NPs/CS catalysts showed high catalytic activity for the hydrolytic dehydrogenation of ammonia borane (NH{sub 3}BH{sub 3}, AB) in aqueous solution. As for the catalytic reaction with an activation energy (E{sub a}) of 36.25 kJ mol{sup −1}, the orders of palladium and AB concentrations were 0.81 and 0.45, respectively. The maximum turnover frequency was as high as 24.76 mol{sub H{sub 2}}·mol{sub Pd}{sup -1}·min{sup -1} at 30 °C. In addition, the Pd NPs/CS catalysts still kept satisfied catalytic activity even after eleven runs.

• OSTI ID: 22805139
• Journal Information: Materials Research Bulletin, Vol. 103; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
08 HYDROGEN
ACTIVATION ENERGY
AMINO ACIDS
AMMONIA
AQUEOUS SOLUTIONS
BORANES
CATALYSTS
CONCENTRATION RATIO
DEHYDROGENATION
HYDROGEN PRODUCTION
HYDROLYSIS
NANOPARTICLES
PALLADIUM
PALLADIUM CHLORIDES
REACTION KINETICS