TY - JOUR
T1 - Hydrogen storage in prussian blue analogues
T2 - H2 interaction with the metal found at the cavity surface
AU - Krap, C. P.
AU - Balmaseda, J.
AU - Del Castillo, L. F.
AU - Zamora, B.
AU - Reguera, E.
PY - 2010/1/21
Y1 - 2010/1/21
N2 - In open framework Prussian blue analogues, all of the metal atoms linked at theNend of the CN groups are found at the surface of the cavities with an unsaturated coordination environment. These metal sites are available for a specific interaction with guest species. To shed light on the H2 interaction with these metal sites, H2 adsorption isotherms in Ni3-xMnx[Co(CN)6]2, Ni 3-xCox[Co(CN)6]2, Ni 3-xCdx[Co-(CN)6]2, and Co 3-xMnx[Co(CN)6]2 were recorded and evaluated. According to the obtained data for the adsorption heat values, the strongest H2-metal interaction was found for Ni. The same evidence is obtained from the fitting of the isotherms using the osmotic model, where the value for the osmotic parameter (g) senses the strength for the guest-host interaction. The probable origin of that stronger interaction for the Ni atom is discussed. The information derived from these mixed series was complemented with an analogue study for T3[Co(CN)6]2 and T3[Ir(CN)6]2, with T = Mn, Co, Ni, Zn, Cu, and Cd. The strength for the guest-host interaction in these two simple series follows the order: Ni > Cu > Co ̃ Cd >Mn ̃ Zn. For the series T3[Co(CN)6]2, H2 adsorption isotherms up to 7600 Torr were recorded, confirming that the strongest H 2-metal interaction corresponds to Ni and Cu. The samples to be studied were characterized from energy-dispersed spectroscopy, X-ray diffraction, infrared, and CO2 adsorption data.
AB - In open framework Prussian blue analogues, all of the metal atoms linked at theNend of the CN groups are found at the surface of the cavities with an unsaturated coordination environment. These metal sites are available for a specific interaction with guest species. To shed light on the H2 interaction with these metal sites, H2 adsorption isotherms in Ni3-xMnx[Co(CN)6]2, Ni 3-xCox[Co(CN)6]2, Ni 3-xCdx[Co-(CN)6]2, and Co 3-xMnx[Co(CN)6]2 were recorded and evaluated. According to the obtained data for the adsorption heat values, the strongest H2-metal interaction was found for Ni. The same evidence is obtained from the fitting of the isotherms using the osmotic model, where the value for the osmotic parameter (g) senses the strength for the guest-host interaction. The probable origin of that stronger interaction for the Ni atom is discussed. The information derived from these mixed series was complemented with an analogue study for T3[Co(CN)6]2 and T3[Ir(CN)6]2, with T = Mn, Co, Ni, Zn, Cu, and Cd. The strength for the guest-host interaction in these two simple series follows the order: Ni > Cu > Co ̃ Cd >Mn ̃ Zn. For the series T3[Co(CN)6]2, H2 adsorption isotherms up to 7600 Torr were recorded, confirming that the strongest H 2-metal interaction corresponds to Ni and Cu. The samples to be studied were characterized from energy-dispersed spectroscopy, X-ray diffraction, infrared, and CO2 adsorption data.
UR - http://www.scopus.com/inward/record.url?scp=77149132747&partnerID=8YFLogxK
U2 - 10.1021/ef900823s
DO - 10.1021/ef900823s
M3 - Artículo
AN - SCOPUS:77149132747
SN - 0887-0624
VL - 24
SP - 581
EP - 589
JO - Energy and Fuels
JF - Energy and Fuels
IS - 1
ER -