Ru Nanoparticles Embedded in Cubic Mesoporous Silica SBA-1 as Highly Efficient Catalysts for Hydrogen Generation from Ammonia Borane

Catalysts

Ching-Shiun Chen¹  Hsien-Ming Kao²  Diganta Saikia²  Kuo-Shu Hsia²  JutiRani Deka³  Yung-Chin Yang³ 

[1] Center for General Education, Chang Gung University, Taoyuan City 33302, Taiwan;Department of Chemistry, National Central University, Chung-Li 32054, Taiwan;Institute of Materials Science and Engineering, National Taipei University of Technology, Taipei 106, Taiwan;

关键词: mesoporous silica;    carboxylic acid;    ru;    ammonia borane;    hydrolysis;   

DOI  :  10.3390/catal10030267

来源: DOAJ

【 摘 要 】

Cubic mesoporous silica SBA-1 functionalized with carboxylic acid (-COOH), namely S1B-C10, is used as a support to fabricate and confine Ru nanoparticles (NPs). The uniformly dispersed organic functional groups in SBA-1 are beneficial in attracting Ru cations, and as a result, homogenously distributed small sized Ru NPs are formed within the mesopores. The prepared Ru@S1B-C10 is utilized as a catalyst for H₂ generation from the hydrolysis of ammonia borane (AB). The Ru@S1B-C10 catalyst demonstrates high catalytic activity for H₂ generation (202 mol H₂ mol_Ru min⁻¹) and lower activation energy (24.13 kJ mol⁻¹) due to the small sized Ru NPs with high dispersion and the support’s interconnected mesoporous structure. The nanosized Ru particles provide abundant active sites for the catalytic reaction to take place, while the interconnected porous support facilitates homogenous transference and easy dispersal of AB molecules to the active sites. The catalyst demonstrates good recycle ability since the accumulation and leaking of NPs throughout catalysis can be effectively prevented by the support.

【 授权许可】

Unknown