2011 Fiscal Year Final Research Report
Development of scanning electrochemical nano-scope and analyses of initiation mechanism and kinetics of localized interfacial reaction
| Project/Area Number |
21360350
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Material processing/treatments
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| Research Institution | Hokkaido University |
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Principal Investigator |
FUSHIMI Koji 北海道大学, 大学院・工学研究院, 准教授 (20271645)
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| Co-Investigator(Kenkyū-buntansha) |
KONNO Hidetaka 北海道大学, 大学院・工学研究科, 教授 (50002316)
HASEGAWA Yasuchika 北海道大学, 大学院・工学研究院, 教授 (80324797)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 走査型電気化学顕微鏡 / ヘテロ界面反応 / 反応活性分布 / 反応機構 / 反応速度論 / 不働態 / ゆらぎ |
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| Research Abstract |
New micro-electrochemical techniques developed were applied to investigate the mechanism and kinetics of heterogeneous reaction of the interface between practical materials and environment. Though a probe nano-electrode was successfully developed by using LIGA, the development of a scanning electrochemical nano-scope could not be completed because of the difficulty of probe alignment. However, the application of a coaxial double microelectrode to SECM probe was successfully attained the improvement of sensitivity and lateral resolution of SECM image. Application of this SECM and amicro-electrochemical cell technique to in situ observation of polycrystalline iron surface corroding in acidic sulphate media revealed that iron corroded heterogeneously depending on crystallographic orientation which affected the hydrogen evolution reactivity. The stability of passive state on iron was also strongly dependent on the substrate orientation.
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