Work

Bimetallic Au–Ni Nanoparticles Embedded in SiO2 Nanospheres: Synergetic Catalysis in Hydrolytic Dehydrogenation of Ammonia Borane

Year: 2010

Type: article

Abstract: Gold-nickel nanoparticles (NPs) of 3-4 nm diameter embedded in silica nanospheres of around 15 nm have been prepared by using [Au(en)(2)Cl(3)] and [Ni(NH(3))(6)Cl(2)] as precursors in a NP-5/cyclohexane reversed-micelle system, and by in situ reduction in an aqueous solution of NaBH(4)/NH(3)BH(3). Compared with monometallic Au@SiO(2) and Ni@SiO(2), the as-synthesized Au-Ni@SiO(2) catalyst shows higher catalytic activity and better durability in the hydrolysis of ammonia borane, generating a nearly stoichiometric amount of hydrogen. During the generation of H(2), the synergy effect between gold and nickel is apparent: The nickel species stabilizes the gold NPs and the existence of gold helps to improve the catalytic activity and durability of the nickel NPs.

Source: Chemistry - A European Journal

DOI: 10.1002/chem.200902829

Authors: Hai‐Long Jiang, Tetsuo Umegaki, Tomoki Akita, Xin‐Bo Zhang, Masatake Haruta, Qiang Xu

Institutions: Japan Science and Technology Agency, National Institute of Advanced Industrial Science and Technology, Tokyo Metropolitan University

Language: English

Topic: Hydrogen Storage and Materials

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funder: National Institute of Advanced Industrial Science and Technology

OpenAlex ID: W2133308036

FWCI: 10.5

Cites: 61

Cited by: 205

Related to: 9