Dali Yang1, Vivian Ding2, Junhua Luo3, Robert S. Currier4, Steve Obrey5, 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) Chemistry Division, Los Alamos National Laboratory, MS J565, P.O. Boc 1663, Los Alamos, NM 87545, (5) C-Adi, Los Alamos National Laboratory, Los Alamos, 87545
Quartz crystal microbalance with dissipation (QCM-D) measurement was used to investigate the kinetics of molecular hydrogen adsorption into thin films of the Prussian blue analogue Cu3[Co(CN)6]2 at ambient conditions. Although the equilibrium adsorption seems to be 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 interacts with H2 molecules physically. The highest measured H2 uptake by Cu3[Co(CN)6]2 films was obtained when the gas phase was stagnant inside the testing cell. However, the unusual high H2 uptake measured by QCM-D calls into question the reliability of the method.
LAUR number – 08-2652 and 08-06013