Journal of Materials Research and Technology Journal of Materials Research and Technology
J Mater Res Technol 2018;7:173-9 DOI: 10.1016/j.jmrt.2018.01.009
Original Article
Synthesis and hydrogen storage of La23Nd7.8Ti1.1Ni33.9Co32.9Al0.65 alloys
Priyanka Meenaa,b,c,, , Mukesh Jangira, Ramvir Singhc, Vishnu Kumar Sharmab, Indra Prabh Jaina
a Centre for Non-Conventional Energy Resources, University of Rajasthan, Jaipur, India
b Metallurgical and Material Engineering Department, MNIT, Jaipur, India
c Physics Department, University of Rajasthan, Jaipur, India
Received 01 May 2017, Accepted 09 January 2018
Abstract

The present work investigates structural and hydrogen storage properties of first time synthesized La23Nd7.8Ti1.1Ni33.9Co32.9Al0.65 alloy by arc melting process and ball milled to get it in nano structure form. XRD analysis of as-prepared alloy showed single phased hexagonal LaNi5-type structure with 52nm average particle size, which reduces to about 31nm after hydrogenations. Morphological studies by SEM were undertaken to investigate the effect of hydrogenation of nanostructured alloy. EDX analysis confirmed elemental composition of the as-prepared alloy. Activation energy for hydrogen desorption was studied using TGA analysis and found to be −76.86kJ/mol. Hydrogenation/dehydrogenation reactions and absorption kinetics were measured at temperature 100°C. The equilibrium plateau pressure was determined to be 2bar at 100°C giving hydrogen storage capacity of about 2.1wt%.

Keywords
Hydrogen storage, La23Nd7.8Ti1.1Ni33.9Co32.9Al0.65 alloy, SEM, EDS, TGA, Hydrogenation/dehydrogenation
J Mater Res Technol 2018;7:173-9 DOI: 10.1016/j.jmrt.2018.01.009
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