Hydrogen Storage in the Dehydrated Prussian Blue Analogues M3[Co(CN)6]2 (M = Mn, Fe, Co, Ni, Cu, Zn)
The porosity and hydrogen storage properties for the dehydrated Prussian blue analogues
M3 [Co (CN) 6] 2 (M= Mn, Fe, Co, Ni, Cu, Zn) are reported. Argon sorption isotherms
measured at 87 K afford BET surface areas ranging from 560 m2/g for Ni3 [Co (CN) 6] 2 to
870 m2/g for Mn3 [Co (CN) 6] 2; the latter value is comparable to the highest surface area
reported for any known zeolite. All six compounds show significant hydrogen sorption at 77
K and 890 Torr, varying from 1.4 wt% and 0.018 kg H2/L for Zn3 [Co (CN) 6] 2 to 1.8 wt …
M3 [Co (CN) 6] 2 (M= Mn, Fe, Co, Ni, Cu, Zn) are reported. Argon sorption isotherms
measured at 87 K afford BET surface areas ranging from 560 m2/g for Ni3 [Co (CN) 6] 2 to
870 m2/g for Mn3 [Co (CN) 6] 2; the latter value is comparable to the highest surface area
reported for any known zeolite. All six compounds show significant hydrogen sorption at 77
K and 890 Torr, varying from 1.4 wt% and 0.018 kg H2/L for Zn3 [Co (CN) 6] 2 to 1.8 wt …
The porosity and hydrogen storage properties for the dehydrated Prussian blue analogues M3[Co(CN)6]2 (M = Mn, Fe, Co, Ni, Cu, Zn) are reported. Argon sorption isotherms measured at 87 K afford BET surface areas ranging from 560 m2/g for Ni3[Co(CN)6]2 to 870 m2/g for Mn3[Co(CN)6]2; the latter value is comparable to the highest surface area reported for any known zeolite. All six compounds show significant hydrogen sorption at 77 K and 890 Torr, varying from 1.4 wt % and 0.018 kg H2/L for Zn3[Co(CN)6]2 to 1.8 wt % and 0.025 kg H2/L for Cu3[Co(CN)6]2. Fits to the sorption data employing the Langmuir−Freundlich equation give maximum uptake quantities, resulting in a predicted storage capacity of 2.1 wt % and 0.029 kg H2/L for Cu3[Co(CN)6]2 at saturation. Enthalpies of adsorption for the frameworks were calculated from hydrogen isotherms measured at 77 and 87 K and found to increase with M varying in the order Mn < Zn < Fe < Co < Cu < Ni. In all cases, the binding enthalpies, which lie in the range of 5.3−7.4 kJ/mol, are higher than the 4.7−5.2 kJ/mol measured for Zn4O(1,4-benzenedicarboxylate)3.
ACS Publications以上显示的是最相近的搜索结果。 查看全部搜索结果