2020 Fiscal Year Final Research Report
High-speed time-resolved observation of electrode reaction
| Project/Area Number |
18H01935
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Review Section |
Basic Section 32010:Fundamental physical chemistry-related
|
|---|
| Research Institution | Chiba University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2018-04-01 – 2021-03-31
|
| Keywords | 電気二重層 |
|---|
| Outline of Final Research Achievements |
The electrochemical reactions consist the multiple elementary steps, such as diffusion and adsorption/desorption. In order to understand the mechanism of the reactions, it is essential to investigate dynamical structure as well as static structure. In this study, transient potential/current and time resolved infrared spectroscopic measurements stimulated by using the pulse laser heating were performed for the water molecules in the electrical double layer formed at the Pt(111) electrode. The orientation change of interfacial water induced by local heating at the surface was investigated in real-time. Moreover, the fluctuation structure of the iodide adsorbed on the Au(111) electrode at the adsorption equilibrium was observed using X-ray photon correlation spectroscopy. The fluctuation behavior was compared with the dynamics of the vacancies in the adsorbed layer observed using scanning tunneling microscopy.
|
| Free Research Field |
表面電気化学
|
| Academic Significance and Societal Importance of the Research Achievements |
レーザー加熱誘起法はこれまで，過渡電位や過渡電流変化の観測に用いられてきたが，本研究では赤外分光に展開した。ステップスキャン赤外分光に展開し，ナノ秒オーダーの界面種の追跡を可能にした。また，表面・界面における平衡状態の観測には走査型トンネル顕微鏡観測が用いられてきたが，時間分解能や空間分解能で劣る。そこでX線光子相関分光を電極界面に展開し，広い時間領域で吸着種の揺らぎ構造を観測することに成功した。
|
