SIPS 2018

DETAILLED PROGRAM OVERVIEW

Microstructural Design in Hydrogen Fuel Storage
Jerzy Szpunar¹;
¹UNIVERSITY OF SASKATCHEWAN, Saskatoon, Canada;
PAPER: 366/Energy/Invited (Oral)
SCHEDULED: 14:50/Tue./Asian (60/3rd)

ABSTRACT:
The storage of hydrogen will also require structural modification of the storage system. One of storage systems that was developed by us will be discussed. We designed a Pd-graphene composite for hydrogen storage with spherical shaped nanoparticles of 45 nm size, homogeneously distributed over a graphene substrate. This new hydrogen storage system has attractive features like high gravimetric density, ambient conditions of hydrogen charge and low temperature of the hydrogen discharge. The palladium particles produce a low activation energy barrier to dissociate hydrogen molecules These Pd particles, have to be nano-size and homogeneously dispersed on the graphene surface, to serve as efficient hydrogen receptors and further facilitate a dissociation and diffusion of hydrogen and storage in graphene via a spillover process. The hydrogen storage capacity in such a combined metal-graphene system could be significantly increased compared to storage in graphene or in metal. In this project, we optimized the structure of Pd/graphene to allow a hydrogen uptake at ambient conditions and discharging of hydrogen at low temperature. In particular, with hydrogen charging pressure of 60 bar, the Pd/graphene composite system with a Pd loading amount of 1 at. % captures 10 wt. % of hydrogen.

References:
1. Razavi-Tousi, J.A. Szpunar, Effect of addition of water-soluble salts on the hydrogen generation of aluminium in reaction with hot water, Journal of Alloys and Compounds, 679 (2016) 364-374.
2. Razavi-Tousi, J.A. Szpunar, Microstructural evolution and grain subdivision mechanisms during severe plastic deformation of aluminum particles by ball milling, Philosophical Magazine, 95 (2015) 1425-1447.
3. C.Y. Zhou, J.A. Szpunar, X.Y. Cui, Synthesis of Ni/graphene nanocomposite for hydrogen storage, ACS Applied Materials & Interfaces, 8 (2016) 15232-15241.
4. A. Choudhary, L. Malakkal, R.K. Siripurapu, B. Szpunar, J.A.Szpunar, First principles calculations of hydrogen storage on Cu and Pd-decorated graphene, International Journal of Hydrogen Energy, 41 (2016) 17652-17656.
5. O. Faye, U. Eduok, J. Szpunar, B. Szpunar, A. Samoura, A. Beye, Hydrogen Storage on bare Cu atom and Cu-functionalized boron-doped graphene: a first Principles study, International Journal of Hydrogen Energy, 42 (2017) 4233-4243.