ABSTRACT
As a clean and renewable energy carrier, hydrogen is an important component of most alternative energy portfolios. Hydrogen has a very high energy content by weight and combines with oxygen to produce only water with release of energy. For these reasons, hydrogen is an excellent fuel that can be used to power fuel cells, combustion engines, and turbines, without production of carbon dioxide greenhouse gas at the point of use [1,2]. However, a major drawback for the practical use of hydrogen is its low volumetric density, making pure hydrogen impractical to store and transport [3]. Thus, implementation of hydrogen technologies requires materials that can safely store and release large amounts of hydrogen under practical conditions [4].
