Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan.
J Phys Chem A. 2010 Mar 18;114(10):3510-5. doi: 10.1021/jp908174s.
The equilibrium for the reversible decomposition of formic acid into carbon dioxide and hydrogen is studied in the ionic liquid (IL) 1,3-dipropyl-2-methylimidazolium formate. The equilibrium is strongly favored to the formic acid side because of the strong solvation of formic acid in the IL through the strong Coulombic solute-solvent interactions. The comparison of the equilibrium constants in the IL and water has shown that the pressures required to transform hydrogen and carbon dioxide into formic acid can be reduced by a factor of approximately 100 by using the IL instead of water. The hydrogen transformation in such mild conditions can be a chemical basis for the hydrogen storage and transportation using formic acid.
甲酸在离子液体 1,3-二丙基-2-甲基咪唑甲酸盐中的可逆分解平衡进行了研究。由于甲酸在离子液体中通过强库仑溶质-溶剂相互作用而得到强烈的溶剂化，甲酸的分解反应强烈有利于甲酸一侧。在离子液体和水中的平衡常数的比较表明，使用离子液体代替水可以将氢气和二氧化碳转化为甲酸所需的压力降低约 100 倍。在如此温和的条件下进行的氢气转化可以为甲酸的储氢和输氢提供化学基础。
