2013 Fiscal Year Final Research Report
Local electronic structures of solid-liquid interfaces in electrochemical reaction revealed by soft X-ray absorption spectroscopy
| Project/Area Number |
23685006
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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 |
Physical chemistry
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| Research Institution | Institute for Molecular Science |
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Principal Investigator |
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 軟X線吸収分光法 / 液体・溶液 / 電気化学反応 / オペランド分光 / 固液界面 |
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| Research Abstract |
To better understand electrochemical reaction, it is necessary to investigate local electronic structures of electrolytes including solid-liquid interfaces at different potentials. Soft X-ray absorption spectroscopy (XAS) is an element-selective method to investigate structures of liquid and aqueous solutions. In this study, we have developed a transmitted-type liquid cell, in which the thickness of the liquid layer is controllable between 20 and 2000 nm, and measured XAS of liquid and aqueous solutions in transmission mode. By using the liquid cell with built-in electrodes, we have successfully measured XAS of electrolytes in electrochemical reactions, and revealed the local structural changes of electrolytes at different potentials. We have also developed an in-situ operando observation system for electrochemical reaction by XAS with potential modulation method at a same scanning rate of cyclic voltammetry (100 mV/s).
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