金属硝普盐M[Fe(CN)5NO]（M = Co，Ni）的储氢性能

Hydrogen storage properties of metal nitroprussides M[Fe(CN)5NO], (M = Co, Ni).

作者信息

Culp Jeffrey T, Matranga Christopher, Smith Milton, Bittner Edward W, Bockrath Bradley

机构信息

National Energy Technology Laboratory, United States Department of Energy, P. O. Box 10940, Pittsburgh, Pennsylvania 15236, USA.

出版信息

J Phys Chem B. 2006 Apr 27;110(16):8325-8. doi: 10.1021/jp056955r.

DOI:10.1021/jp056955r

PMID:16623516

Abstract

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 approximately 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 approximately 7.5 kJ/mol at 0.40 wt % coverage to approximately 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.

摘要

已在77 K和87 K下测量了两种同构脱水立方金属硝普盐M[Fe(CN)5NO]（M = Co2+、Ni2+）的体积氢吸附等温线，压力高达760 Torr。这些材料是迄今为止报道的基于多孔配位聚合物的最有效的H2吸附剂之一。在77 K和760 Torr下，两种材料的H2吸收量约为1.6 wt%。这些H2容量与最近在结构相关的M3[Co(CN)6]2化合物中报道的容量相当，并且在相同的温度和压力条件下，比Zn4O(1,4 - 苯二甲酸酯)3报道的容量高出约25%。根据两种材料在77 K和87 K下的等温线计算得出的H2吸附等量热，发现在0.40 wt%覆盖率下约为7.5 kJ/mol，在1.2 wt%覆盖率下约为5.5 kJ/mol。对于M = Ni和M = Co，N2 BET表面积分别测定为634 m2/g和523 m2/g。