Electrochemical behavior of oxygen/superoxide ion couple in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl) imide room-temperature molten salt
Electrochemical behavior of oxygen/superoxide ion couple in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl) imide room-temperature molten salt
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DOI：
10.1149/1.1946530
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发表时间：
2005-01-01
影响因子：
3.9
通讯作者：
Miura, T
中科院分区：
文献类型：
--
作者：
Katayama, Y;Sekiguchi, K;Miura, T
利用超微电极技术研究了氧（O-2）/超氧离子（O-2（-））电对在1-丁基-1-甲基吡咯烷双（三氟甲基磺酰基）酰亚胺（BMPTFSI）室温熔盐（离子液体）中的电化学行为。25 ℃时O-2的扩散系数为（1.8 +/- 0.2）× 10（-6）cm（2）s（-1）。由扩散系数的温度依赖性估算出O-2扩散过程的活化能为27 kJ mol（-1）。O-2在BMPTFSI中的溶解度在25 ℃时为14 mmol dm（-3），并随着温度的升高而降低。O-2（-）的扩散系数在25 ℃时为0.86 × 10（-6）cm（2）s（-1）。O-2/O-2（-）电对的形式电位为1.13V（相对于二茂铁/二茂铁）。(c)2005年电化学学会。All rights reserved.
The electrochemical behavior of oxygen (O-2)/superoxide ion (O-2(-)) couple was investigated with the aid of the ultramicroelectrode technique in 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (BMPTFSI) room-temperature molten salt (ionic liquid). The diffusion coefficient of O-2 was (1.8 +/- 0.2) X 10(-6) cm(2) s(-1) at 25 degrees C. The activation energy of the diffusion process of O-2 was estimated to be 27 kJ mol(-1) from the temperature dependence of the diffusion coefficient. The solubility of O-2 in BMPTFSI was 14 mmol dm(-3) at 25 degrees C and decreased with an increase in temperature. The diffusion coefficient of O-2(-) was 0.86 X 10(-6) cm(2) s(-1) at 25 degrees C. The formal potential of O-2/O-2(-) couple was 1.13 V vs ferrocene/ferrocenium. (c) 2005 The Electrochemical Society. All rights reserved.