Structural dynamic of interfacial water determined by the experimental simulation of the electrical double layer

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H03763
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Physical chemistry
• Research Institution: Chiba University
• Principal Investigator: Nakamura Masashi 千葉大学, 大学院工学研究院, 准教授 (70348811)
• Co-Investigator(Kenkyū-buntansha): 遠藤 理 東京農工大学, 工学(系)研究科(研究院), 助教 (30343156)
• Co-Investigator(Renkei-kenkyūsha): SAKATA OSAMI 物質・材料研究機構, 中核機能部門 高輝度放射光ステーション, ステーション長 (40215629)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 電気二重層 / ヘルムホルツ面 / 表面X線回折 / 超高真空シミュレーション

Outline of Final Research Achievements

We reveal the structure and the role of interfacial water by the experimental simulation of the electrical double layer. By the optimization of adsorption protocol and annealing temperature for the coadsorbed layer of water and alkali metal on Ag(100), the modeling under ultra-high vacuum can simulate the electrode interface that the hydrated alkali metal cations are located on the surface.
In-situ X-ray diffraction reveals the orientation change of interfacial water on the graphene electrode and the dehydration process during metal deposition. The water bi-layer structure on the graphene electrode is formed and the layer spacing of bi-layer depends on the electrode potential.

Free Research Field

電気化学，表面科学