2009 Fiscal Year Final Research Report
Time-resolved IR Absorption Study on Electron Transfer and Electrochemical Reactions by Ultra-fast Potential Jump Method
| Project/Area Number |
19685006
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| Research Category |
Grant-in-Aid for Young Scientists (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
Analytical chemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
YAMAKATA Akira Hokkaido University, 大学院・工学研究科, 准教授 (60321915)
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| Research Collaborator |
OSAWA Masatoshi 北海道大学, 触媒化学研究センター, 教授 (00108466)
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| Project Period (FY) |
2007 – 2009
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| Keywords | 時間分解赤外分光 / 電極反応ダイナミクス / 電子移動反応 / 電気二重層 / 界面水分子の配向緩和 / 水和殻崩壊過程 / 親水・疎水相互作用 |
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| Research Abstract |
For the full understanding of electrochemical reactions, structural changes of adsorbed reactants as well as water molecules around the surface should be studied in a time-resolved manner. We have found that the laser-induced orientation change of water molecules in the electric double layers causes a sudden change in electrode potentials. The detailed analysis of the potential jump revealed that water molecules on a hydrophobic surface are more flexible than on a hydrophilic surface. Structured water layers on a hydrophobic surface is readily destroyed by the forced approach of hydrophilic cations than by hydrophobic cations.
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