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首页> 外文期刊>Chemistry: A European journal >Synthesis of Triple-Layered Ag@Co@Ni Core–Shell Nanoparticles for the Catalytic Dehydrogenation of Ammonia Borane
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Synthesis of Triple-Layered Ag@Co@Ni Core–Shell Nanoparticles for the Catalytic Dehydrogenation of Ammonia Borane

机译：三层Ag @ Co @ Ni核壳纳米粒子的合成用于氨硼烷的催化脱氢

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摘要

Triple-layered Ag@Co@Ni core–shell nanoparticles (NPs) containing a silver core, a cobalt inner shell, and a nickel outer shell were formed by an in situ chemical reduction method. The thickness of the double shells varied with different cobalt and nickel contents. Ag_(0.04)@Co_(0.48)@Ni_(0.48) showed the most distinct core–shell structure. Compared with its bimetallic core–shell counterparts, this catalyst showed higher catalytic activity for the hydrolysis of NH_3BH_3 (AB). The synergetic interaction between Co and Ni in Ag_(0.04)@Co_(0.48)@Ni_(0.48) NPs may play a critical role in the enhanced catalytic activity. Furthermore, cobalt–nickel double shells surrounding the silver core in the special triple-layered core–shell structure provided increasing amounts of active sites on the surface to facilitate the catalytic reaction. These promising catalysts may lead to applications for AB in the field of fuel cells.
机译：通过原位化学还原法形成了包含银核，钴内壳和镍外壳的三层Ag @ Co @ Ni核壳纳米颗粒（NPs）。双壳的厚度随钴和镍含量的不同而变化。 Ag_（0.04）@Co_（0.48）@Ni_（0.48）显示出最独特的核-壳结构。与双金属核-壳结构相比，该催化剂对NH_3BH_3（AB）的水解显示出更高的催化活性。 Ag_（0.04）@Co_（0.48）@Ni_（0.48）NPs中Co和Ni之间的协同作用可能在增强催化活性中起关键作用。此外，在特殊的三层核-壳结构中，围绕银核的钴-镍双壳在表面上提供了越来越多的活性位，以促进催化反应。这些有前途的催化剂可能会导致AB在燃料电池领域的应用。

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