首页|TiO2@C catalyzed hydrogen storage performance of Mg-Ni-Y alloy with LPSO and ternary eutectic structure
TiO2@C catalyzed hydrogen storage performance of Mg-Ni-Y alloy with LPSO and ternary eutectic structure
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A designed Mg88.7Ni6.3Y5 hydrogen storage alloy containing 14H type LPSO(long-period stacking ordered)and ternary eutectic structure was prepared by regulating the alloy composition and casting.The hydrogen storage performance of the alloy was improved by adding nanoflower-like TiO2@C catalyst.The decomposition of the LPSO structure during hydrogenation led to the formation of plenty of nanocrystals which pro-vided abundant interphase boundaries and activation sites.The nanoscale TiO2@C catalyst was uniformly dispersed on the surface of alloy par-ticles,and the"hydrogen overflow"effect of TiO2@C accelerated the dissociation and diffusion of hydrogen on the surface of the alloy parti-cles.As a result,the in-situ endogenous nanocrystals of the LPSO structure decomposition and the externally added flower-like TiO2@C cata-lyst uniformly dispersed on the surface of the nanoparticles played a synergistic catalytic role in improving the hydrogen storage performance of the Mg-based alloy.With the addition of the TiO2@C catalyst,the beginning hydrogen desorption temperature was reduced to 200 ℃.Further-more,the saturated hydrogen absorption capacity of the sample was 5.32％,and it reached 4.25％(mass fraction)H2 in 1 min at 200 ℃ and 30 bar.
College of Mechanical and Electrical Engineering,Shaanxi University of Science and Technology,Xi'an,Shaanxi 710021,China
Department of Materials Science,Fudan University,Shanghai 200438,China
School of Aeronautics,Northwestem Polytechnical University,Xi'an,Shaanxi 710072,China
Department of Mechanical Engineering & Engineering Science,the University of North Carolina at Charlotte,Charlotte,North Carolina 28223,United States of America
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国家重点研发计划国家自然科学基金Shaanxi Province Key Project of Research and Development Plan,ChinaShaanxi Province Key Project of Research and Development Plan,ChinaDoctoral Scientific Research Starting Foundation of Shaanxi University of Science and Technology,China
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