Monodisperse magnesium hydride nanoparticles uniformly self-assembled on graphene

Authors

Guanglin Xia, University of WollongongFollow
Yingbin Tan, Fudan University
Xiaowei Chen, Fudan University
Dalin Sun, Fudan University
Zaiping Guo, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow
Liuzhang Ouyang, South China University of Technology
Min Zhu, South China University of TechnologyFollow
Xuebin Yu, Fudan UniversityFollow

RIS ID

102925

Publication Details

Xia, G., Tan, Y., Chen, X., Sun, D., Guo, Z., Liu, H., Ouyang, L., Zhu, M. & Yu, X. (2015). Monodisperse magnesium hydride nanoparticles uniformly self-assembled on graphene. Advanced Materials, 27 (39), 5981-5988.

Abstract

Magnesium-based hydrides represent a particularly promising candidate for hydrogen storage because of their high gravimetric and volumetric hydrogen capacities, high abundance (≈2.5% of Earth's surface composition, and virtually in unlimited amounts in sea water), low cost, nontoxicity, and high safety. [ 1 ] Their thermodynamic stability, the slow kinetics of their reversible H 2 storage reaction, and their inherent low thermal conductivity, however, signifi cantly obstruct their practical application in fuel cells. [ 2,3 ] To date, one of the most effective techniques to relieve the kinetic barrier and/or thermodynamics stability of Mg-based hydrides is nanostructuring, [ 4 ] which could directly result in a larger surface-to-volume ratio of the particles, shorter solid-state diffusion distances for hydrogen, and/or decreased thickness of the H 2 -impermeable layer of MgO. [ 5,6 ] Extensive experimental and theoretical studies have recently demonstrated that decreasing the particle size is also capable of thermodynamically destabilizing Mg-based hydrides, leading to a further enhancement of hydrogen storage performance.