Hydrogen Storage Properties of Metal Nitroprussides M[Fe(CN)₅NO], (M = Co, Ni)

Journal Article · Thu Apr 27 04:00:00 EDT 2006 · Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry

DOI:https://doi.org/10.1021/jp056955r· OSTI ID:938585

Culp, J T; Matranga, C S; Smith, M; Bittner, E W; Bockrath, B C

The volumetric hydrogen adsorption isotherms of two isostructural dehydrated cubic metal nitroprussides M[Fe(CN)₅NO] (M = Co²⁺, Ni²⁺) have been measured up to a pressure of 760 Torr at 77 and 87 K. These materials are among the most efficient H₂ sorbents based on porous coordination polymers reported to date. The H₂ uptake in both materials is ~1.6 wt % at 77 K and 760 torr. These H₂ capacities match those reported recently in the structurally related M₃[Co(CN)₆]₂ compounds and are approximately 25% higher than those reported for Zn₄O(1,4-benzenedicarboxylate)₃ under the same conditions of temperature and pressure. The isosteric heats of H₂ adsorption calculated from the 77 and 87 K isotherms for both materials were found to vary from ~7.5 kJ/mol at 0.40 wt % coverage to ~5.5 kJ/mol at 1.2 wt % coverage. The N₂ BET surface areas were determined to be 634 m²/g and 523 m²/g for M = Ni and M = Co, respectively.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR
• Sponsoring Organization: USDOE - Office of Fossil Energy (FE)
• OSTI ID: 938585
• Report Number(s): DOE/NETL-IR-2006-193; NETL-TPR-1411
• Journal Information: Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry, Journal Name: Journal of Physical Chemistry. B, Condensed Matter, Materials, Surfaces, Interfaces and Biophysical Chemistry Journal Issue: 16 Vol. 110; ISSN 1520-6106
• Publisher: American Chemical Society
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
ADSORPTION
ADSORPTION HEAT
ADSORPTION ISOTHERMS
CHEMISORPTION
HYDROGEN
HYDROGEN STORAGE
ISOTHERMS
MORPHOLOGY
PENTACENE
POLYMERS
SILICON
SORPTIVE PROPERTIES
SURFACE AREA