Hydrogen storage in carbon nanotubes and related materials

Graphene: A Rising Star on the Horizon of Materials Science

“…First-principle calculations show that CO 2 molecules sit alternatively parallel configuration on the sixmembered rings [66]. Several groups studied the adsorption of H 2 by graphene and other carbon nanomaterials [66][67][68]. It was found that the adsorption to be completely reversible in graphene and comparable to that of carbon nanotubes.…”

Charged soc metal‐organic framework for high‐efficacy H2 adsorption and syngas purification: Atomistic simulation study

“…Nanoporous materials such as zeolites and activated carbons have been proposed for H 2 storage and syngas separation 3. Recently, metal‐organic frameworks (MOFs) have emerged as an important class of hybrid inorganic–organic materials 4.…”

Characterization and Hydrogen Storage of Surface-Modified Multiwalled Carbon Nanotubes for Fuel Cell Application

“…Similarly, an alternative way of increasing the hydrogen adsorption capacities of MWCNTs is loading them with transition metals. Enormous progress has been made towards the development of metal-doped CNTs (Li, Ni, Pd, Fe, Pb, Pt, Al, Ti, V, or La) as a hydrogen gas storage material [34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51]. Nanoporous MWCNTs consisting of small transition metallic nanoparticles are exposed to the vicinity of pore volume and surface area and that can be a major concern for hydrogen storage abilities [19,20,23,35,41,45,46,52,53].…”

“…Rather et al [46] reported that the hydrogen adsorption of Pd-embedded CNTs possesses a maximum reversible hydrogen storage capacity of 0.18 wt% at 298 K and 1.6 MPa, which is nearly twice the storage capacity of pristine CNTs. According to Gundiah et al [37] Pd-loaded MWCNTs showed enhanced hydrogen absorption kinetics on the storage system even though maximum adsorption was obtained of only 3.7 wt% at 300 K. Yildirim and Ciraci [55] have reported that a single Ti atom adsorbed on single-walled CNTs can strongly bind to up to four hydrogen molecules using a computational study. In other words, single-walled CNTs decorated with Ti can strongly adsorb up to 8 wt% hydrogen.…”

“…The XANES/EXAFS spectra offer a basic understanding of the oxidation states and fine structure of the metal-loaded MWCNTs for the characteristic nature of hydrogen adsorption. The XANES/EXAFS spectroscopy is also an excellent technique for characterizing the valency and local structure of Pd/Co/Ni metals in catalysts with short-range order [37,[56][57][58]. Thus, the main objective of the present study is to investigate the fine structure, oxidation states, or surface chemical modification of MWCNTs and Pd/Co/Ni atoms dispersed in the catalyst using HR-TEM, XRD, FE-SEM/EDS, and XANES/EXAFS spectroscopy.…”