Investigation of the behaveior of ionic liquid containing water by electrochemical spectroscopy

• Project/Area Number: 15K04683
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Thin film/Surface and interfacial physical properties
• Research Institution: Asahikawa National College of Technology
• Principal Investigator: Atsushi Hyono 旭川工業高等専門学校, 物質化学工学科, 助教 (20554299)
• Co-Investigator(Kenkyū-buntansha): 高瀬 舞 室蘭工業大学, 工学研究科, 准教授 (20631972) ; 松島 永佳 北海道大学, 工学研究院, 准教授 (30578026) ; 阿部 薫明 北海道大学, 歯学研究院, 助教 (40374566) ; 本林 健太 名古屋工業大学, 工学(系)研究科(研究院), 助教 (60609600)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: 界面化学 / イオン液体 / 電気化学 / 電極 / 表面増強赤外分光

Outline of Final Research Achievements

The electrochemical properties of hydrophilic ionic liquid-water mixtures were investigated. An anodic current appeared when slight water was added to the ionic liquid. This peak was increased with water concentration and the slope of the increase of the peak area was changed around 10wt% water concentration.
The solution resistance was also changed around 10 wt%. In the case of thiol-modified electrodes, the resistance was increased because the reactive anion suffered steric repulsion.
Hydrogen bonds between water molecules were observed in even slight water concentration, and these are strengthened with water increasing.

Research Products

• [Presentation] 水分混入による親水性イオン液体の電気化学的挙動に対する影響 (2017)
  • Author(s): 岡紗雪・千葉誠・本林健太・大澤雅俊・兵野篤
  • Organizer: 化学系学協会北海道支部2017年冬季研究発表会
  • Place of Presentation: 北海道大学（北海道札幌市）
  • Year and Date: 2017-01-17
• [Presentation] 親水性イオン液体1-Ethyl-3-methylimidazolium hydrogen sulfateの金電極表面での電気化学挙動における水の影響 (2017)
  • Author(s): 岡 紗雪, 本林 健太, 千葉 誠, 阿部 薫明, 兵野 篤
  • Organizer: 日本金属学会2018年春季講演大会
• [Presentation] 親水性イオン液体/水混合溶液の電気化学挙動 (2017)
  • Author(s): 岡紗雪, 本林健太, 千葉誠, 阿部薫明, 兵野篤
  • Organizer: 化学系学協会北海道支部 2018 年冬季研究発表会
• [Presentation] 金電極表面での親水性イオン液体の挙動 (2017)
  • Author(s): 岡 紗雪, 千葉 誠, 本林 健太, 兵野 篤
  • Organizer: 平成29年度日本鉄鋼協会・日本金属学会両北海道支部合同サマーセッション
• [Presentation] Investigation of the behavior of ionic liquid ( 1-Ethyl-3-methylimidazolium hydrogen sulfate) containing water with electrochemical methods (2016)
  • Author(s): Sayuki Oka, Yumi Nobuta, Kenta Motobayashi, Makoto Chiba, Masatoshi Ohsawa, Atushi Hyono
  • Organizer: The 17th Chitose International Forum on Photonics Science & Technology
  • Place of Presentation: 千歳科学技術大学（北海道千歳市）
  • Year and Date: 2016-11-14
  • Int'l Joint Research
• [Presentation] チオール修飾電極表面におけるイオン液体分子の挙動 (2016)
  • Author(s): 岡紗雪・信田優美・本林健太・千葉誠・兵野篤
  • Organizer: 日本化学会北海道支部201６年夏季研究発表会
  • Place of Presentation: 室蘭工業大学（北海道室蘭市）
  • Year and Date: 2016-07-23
• [Presentation] 金電極表面におけるイオン液体の動態 (2016)
  • Author(s): 信田優美, 佐藤茜, 本林健太, 千葉誠, 大澤雅俊, 兵野篤
  • Organizer: 化学系学協会北海道支部2016年冬季研究発表会
  • Place of Presentation: 北海道大学（北海道、札幌市）
  • Year and Date: 2016-01-19