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The core–shell nanostructures (M@SiO 2 , Al 2 O 3 , MgO; M=Fe, Co, Ni, Ru) are synthesized and applied in the production of CO x -free H 2 through NH 3 decomposition. The characterization results indicate that the dimension and dispersion of the core particles is dependent on the core constitution, and the shell encapsulation effect (thickness of shell,...
The present study demonstrates that the silica-encapsulated Ni and Ru nanoparticles (nano-Ni@SiO 2 and nano-Ru@SiO 2 ) are catalysts more active and stable than the currently known catalysts for the production of CO x -free hydrogen through ammonia decomposition. The effects of SiO 2 encapsulation are closely related to the nature of the enwrapped core elements. The...
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