One-Step Synthesis of Magnetically Recyclable Au/Co/Fe Triple- Layered Core-Shell Nanoparticles as Highly Efficient Catalysts for the Hydrolytic Dehydrogenation of Ammonia Borane

Magnetically recyclable Au/Co/Fe core-shell nanoparticles （NPs） have been successfully synthesized via a one-step in situ procedure. Transmission electron microscope （TEM）, energy dispersive X-ray spectroscopic （EDS）, and electron energy-loss spectroscopic （EELS） measurements revealed that the trimetallic Au/Co/Fe NPs have a triple-layered core-shell structure composed of a Au core, a Co-rich inter-layer, and a Fe-rich shell. The Au/Co/Fe core-shell NPs exhibit much higher catalytic activities for hydrolytic dehydrogenation of ammonia borane （NHBBH3, AB） than the monometallic （Au, Co, Fe） or bimetallic （AuCo, AuFe, CoFe） counterparts.

有磁力地， recyclable Au/Co/Fe 核心壳 nanoparticles (NP ) 成功地在 situ 过程经由一出一步舞被综合了。传播电子显微镜(TEM ) ，精力散 X 光检查分光镜(版本) ，并且电子精力损失分光镜(鳗) 大小表明 trimetallic Au/Co/Fe NP 有三元组分层的核心壳结构一个 Au 核心，合作富人夹层，和 Fe 富有的壳镇静。Au/Co/Fe 核心壳 NP 为氨 borane 的 hydrolytic 除氢作用展出高得多的催化活动(NH3BH3， AB ) 比一金属(Au，公司， Fe ) 或二金属(AuCo， AuFe， CoFe ) 对应物。