Heat of Adsorption of Parahydrogen and Orthodeuterium on Graphon

Pace, E. L.; Siebert, A. R.

doi:10.1021/j150579a014

Cited by 51 publications

(26 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Using a tabulated function for chemical potential versus pressure, 19 we fit the saran carbon isotherm with f. At low coverage we found ϭ38 meV, in excellent agreement with the results of Pace and Siebert. 20 The isotherm of the saran carbon material in Fig. 2 is similar in shape to isotherms from other carbons of high surface area at 80 K. 12,13,21 Also shown in Fig.…”

Section: ͓S0003-6951͑99͒04816-0͔supporting

confidence: 53%

Hydrogen adsorption and cohesive energy of single-walled carbon nanotubes

Ahn

Witham

et al. 1999

Applied Physics Letters

896

439

View full text Add to dashboard Cite

Hydrogen adsorption on crystalline ropes of carbon single-walled nanotubes ͑SWNT͒ was found to exceed 8 wt. %, which is the highest capacity of any carbon material. Hydrogen is first adsorbed on the outer surfaces of the crystalline ropes. At pressures higher than about 40 bar at 80 K, however, a phase transition occurs where there is a separation of the individual SWNTs, and hydrogen is physisorbed on their exposed surfaces. The pressure of this phase transition provides a tube-tube cohesive energy for much of the material of 5 meV/C atom. This small cohesive energy is affected strongly by the quality of crystalline order in the ropes.

show abstract

Section: ͓S0003-6951͑99͒04816-0͔supporting

confidence: 53%

Hydrogen adsorption and cohesive energy of single-walled carbon nanotubes

Ahn

Witham

et al. 1999

Applied Physics Letters

896

439

View full text Add to dashboard Cite

show abstract

“…Surface areas and saturation pore volumes were calculated from the BET method and the Dubinin-Radushkevich (DR) method [12], respectively, as implemented in Micromeritics ASAP 2020 Version 3.01 software. Pore size distributions from the original DFT method were calculated using Micromeritics ASAP 2020 Version 3.01 software with DFT Plus 4 . High resolution TEM micrographs were acquired on a Tecnai F30UT operated at 300 keV.…”

Section: Experimental Methodsmentioning

confidence: 99%

Pore size distribution and supercritical hydrogen adsorption in activated carbon fibers

Purewal¹,

Kabbour²,

Vajo³

et al. 2009

Nanotechnology

View full text Add to dashboard Cite

Pore size distributions (PSD) and supercritical H 2 isotherms have been measured for two activated carbon fiber (ACF) samples. The surface area and the PSD both depend on the degree of activation to which the ACF has been exposed. The low-surface-area ACF has a narrow PSD centered at 0.5 nm, while the high-surface-area ACF has a broad distribution of pore widths between 0.5 and 2 nm. The H 2 adsorption enthalpy in the zero-coverage limit depends on the relative abundance of the smallest pores relative to the larger pores. Measurements of the H 2 isosteric adsorption enthalpy indicate the presence of energy heterogeneity in both ACF samples. Additional measurements on a microporous, coconut-derived activated carbon are presented for reference.

show abstract

“…As the van der Waals dimension [17] of molecular hydrogen is large when compared to the dimensions of atomic interstitial hydrogen, the volume occupied by either adsorbed gas or even liquid hydrogen falls short of the densities that can be achieved in either metals [18], or complex or chemical hydrogen media, and short of the densities required for vehicle applications. Moreover, the generally weak interaction [19] between adsorbate gas and adsorbent surface requires low temperatures, such as 77 K, for relevant hydrogen quantity uptake. As the available surface area of an adsorbent has generally been the criterion for maximizing uptake, research has typically been devoted to achieving ever higher specific surface area materials without regard to the consequence that this approach leads to extremely low density adsorbents with concomitantly lower volumetric density levels of hydrogen uptake.…”

Section: 1mentioning

confidence: 99%

Applied hydrogen storage research and development: A perspective from the U.S. Department of Energy

O’Malley

Ordaz

Adams

et al. 2015

Journal of Alloys and Compounds

View full text Add to dashboard Cite

a b s t r a c tTo enable the wide-spread commercialization of hydrogen fuel cell technologies, the U.S. Department of Energy, through the Office of Energy Efficiency and Renewable Energy's Fuel Cell Technology Office, maintains a comprehensive portfolio of R&D activities to develop advanced hydrogen storage technologies. The primary focus of the Hydrogen Storage Program is development of technologies to meet the challenging onboard storage requirements for hydrogen fuel cell electric vehicles (FCEVs) to meet vehicle performance that consumers have come to expect. Performance targets have also been established for materials handling equipment (e.g., forklifts) and low-power, portable fuel cell applications. With the imminent release of commercial FCEVs by automobile manufacturers in regional markets, a dual strategy is being pursued to (a) lower the cost and improve performance of high-pressure compressed hydrogen storage systems while (b) continuing efforts on advanced storage technologies that have potential to surpass the performance of ambient compressed hydrogen storage.

show abstract

Heat of Adsorption of Parahydrogen and Orthodeuterium on Graphon

Cited by 51 publications

References 0 publications

Hydrogen adsorption and cohesive energy of single-walled carbon nanotubes

Hydrogen adsorption and cohesive energy of single-walled carbon nanotubes

Pore size distribution and supercritical hydrogen adsorption in activated carbon fibers

Applied hydrogen storage research and development: A perspective from the U.S. Department of Energy

Contact Info

Product

Resources

About