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Nickel addition to optimize the hydrogen storage performance of lithium intercalated fullerides

DOI: 10.1016/j.materresbull.2020.110848 DOI Help

Authors: Matteo Aramini (Diamond Light Source; Università degli studi di Parma) , Giacomo Magnani (Università degli studi di Parma) , Daniele Pontiroli (Università degli studi di Parma) , Chiara Milanese (Università degli Studi di Pavia) , Alessandro Girella (Università degli Studi di Pavia) , Giovanni Bertoni (IMEM-CNR; CNR - Istituto Nanoscienze) , Mattia Gaboardi (Università degli studi di Parma; Elettra Sinctrotrone Trieste) , Stefano Zacchini (Università di Bologna) , Amedeo Marini (Università degli Studi di Pavia) , Mauro Riccò (Università degli studi di Parma)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Materials Research Bulletin , VOL 126

State: Published (Approved)
Published: June 2020

Abstract: The addition of transition metals to alkali intercalated fullerides proved to enhance their already good hydrogen absorption properties. Herein we present a study based on two different synthetic strategies, allowing the addition of nickel as aggregates with different size to the lithium fulleride Li6C60: the former is based on the metathesis of nickel chloride, while the latter on the thermal decomposition of nickel carbonyl clusters. The hydrogen-storage properties of the obtained materials have been investigated with manometric and calorimetric measurements, which indicated a clear enhancement of the final absorption value and kinetics with respect to pristine Li6C60, as a consequence of nickel surface catalytic activity towards hydrogen molecules dissociation. We found up to 10 % increase of the total H2 weight % absorbed (5.5 wt% H2) in presence of Ni aggregates. Furthermore, the control of the transition metal particles size distribution allowed reducing the hydrogen desorption enthalpy of the systems.

Journal Keywords: Hydrogen-storage; Transition metal decoration; Lithium fullerides; Nickel nanoparticles

Subject Areas: Materials


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