| Hydrogen Adsorption In Thin Films of Prussian Blue Analogue | ||
| Dali Yang1, Vivian Ding2, Junhua Luo3, Hongwu Xu4, Robert S. Currier5 and Yusheng Zhao3, (1)Mst - 7, Los Alamos National Laboratory, Los Alamos, NM 87545, (2)Mst-7, Los Alamos National Laboratory, Los Alamos, NM 87545, (3)Lansce-12, Los Alamos National Laboratory, Los Alamos, NM 87545, (4)Ees-6, Los Alamos National Laboratory, Los Alamos, 87545, (5)Chemistry Division, Los Alamos National Laboratory, MS J565, P.O. Boc 1663, Los Alamos, NM 87545 Quartz crystal microbalance with dissipation (QCM-D) measurement was used to investigate the kinetics of the hydrogen adsorption into thin films of prussian blue analogue Cu3[Co(CN)6]2 at ambient conditions. In addition, high-resolution neutron powder diffraction was used to investigate the adsorption of H2 in the Cu3[Co(CN)6]2 powder. Rietveld structural refinement of the neutron data for the H2 loadings (1,2, and ~2.3 H2/Cu) suggests that H2 is adsorbed at two sites within the structure. The H2 adsorption behaviors of the Cu3[Co(CN)6]2 thin films show a typical two–stage sorption, which also suggests two types of sorption modes existing in the Cu3[Co(CN)6]2. Although the equilibrium adsorption is independent of the thickness, the adsorption rate substantially decreases with the thickness of the films. In addition, the reversibility of H2 adsorption into the Cu3[Co(CN)6]2 films was investigated. The results indicate that the Cu3[Co(CN)6]2 mainly interact with H2 molecules physically. The highest H2 uptake by the Cu3[Co(CN)6]2 films is obtained when the gas phase is stagnant inside the testing cell. LAUR number – 08-2652 Extended Abstract Status: Not Uploaded | ||