Hydrogen Production in Aromatic and Aliphatic Ionic Liquids

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• 作者：Surajdevprakash B. Dhiman ; George S. Goff ; Wolfgang Runde ; Jay A. LaVerne
• 刊名：The Journal of Physical Chemistry B
• 出版年：2013
• 出版时间：June 6, 2013
• 年：2013
• 卷：117
• 期：22
• 页码：6782-6788
• 全文大小：370K
• 年卷期：v.117,no.22(June 6, 2013)
• ISSN：1520-5207

文摘

The radiolytic production of molecular hydrogen in the ionic liquids N-trimethyl-N-butylammonium bis(trifluoromethanesulfonyl)imide ([N<sub>1114sub>][Tf<sub>2sub>N]) and 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([emim][Tf<sub>2sub>N]) has been examined with 纬-rays, 2鈥?0 MeV protons, and 5鈥?0 MeV helium ions to determine the functional dependence of the yield on particle track structure. Molecular hydrogen is the dominant gaseous radiolysis product from these ionic liquids, and the yields with 纬-rays are 0.73 and 0.098 molecules per 100 eV of energy absorbed for [N<sub>1114sub>][Tf<sub>2sub>N] and [emim][Tf<sub>2sub>N], respectively. These low yields are consistent with the relative insensitivity of most aromatic compounds to radiation. However, the molecular hydrogen yields increase considerably on going from 纬-rays to protons to helium ions with [emim][Tf<sub>2sub>N] while they remain essentially constant for [N<sub>1114sub>][Tf<sub>2sub>N]. FTIR and UV鈥搗is spectroscopic studies show slight degradation of the ionic liquids with radiation.