Hydrogen storage in carbon nanostructures via spillover. (9th November 2016)

• Record Type: Journal Article
• Authors: Pyle, Darryl S.; Gray, E. MacA.; Webb, C.J.
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 42(2016)
• Page Start: 19098
• Page End: 19113
• Publication Date: 2016-11-09
• Subjects: Hydrogen storage -- Carbon nanostructures -- Spillover -- Surface functionalization; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.08.061
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: The addition of transition metal nanoparticles to carbon nanostructures has been shown to increase the hydrogen storage capacity of carbon nanostructures by dissociating molecular hydrogen and allowing adsorption via chemical means, a process known as hydrogen spillover. This paper is an overview of experimental and theoretical studies on hydrogen storage on transition metal doped carbon nanostructures via the spillover mechanism and the prospects for achieving practical hydrogen storage targets. The most promising materials are found to be high surface area hexagonal system carbons for which the π -conjugation is broken by well dispersed oxygen functional groups or lattice dopants. Highlights: Driving factor for H2 storage via spillover is substrate capacity to store hydrogen. Hydrogen clustering yields a thermodynamic pathway for spillover hydrogen atoms. Dopants and defects that break π-conjugation enhance H2 storage via spillover. Energetics of H migration from TM to substrate are nanoparticle size dependent.