Role of electrochemical activity and electronic structure studied using a scanning tunneling microscopy approach

使用扫描隧道显微镜方法研究电化学活性和电子结构的作用

• 批准号: 21K14595
• 负责人: Wong Raymond
• 金额: $ 2.58万
• 依托单位: Institute of Physical and Chemical Research
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2023-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K14595/
• 关键词: Electrochemistry; solid-liquid interface; ultrahigh vacuum; STM; 電気化学; 表面界面

My project aimed to investigate the role of heterogeneity on the local electronic and structural properties of model electrochemical (electrode/electrolyte) interfaces. Namely, multi-component molecule-level heterogeneity and its dependencies of molecular assemblies. This involved the construction and utilization an approach that combines electrochemistry with ultrahigh vacuum scanning tunneling microscopy. This enables electrochemical-control followed by high-resolution imaging, an approach that has been rarely reported. Indeed, I was able to probe a variety of electrochemical interfaces including graphite electrode emersed from non-aqueous electrolytes and halide-modified gold surfaces. In contrast to studies that provide averaged (electrode-level) information, the approach here can be used to clarify what local structures are desired from the standpoint of electrode design in electrochemical devices.

我的项目旨在研究非均质性对模型电化学（电极/电解质）界面的局部电子和结构特性的作用。即多组分分子水平异质性及其对分子组装的依赖性。这涉及到电化学与超高真空扫描隧道显微镜相结合的方法的构建和应用。这使得电化学控制和高分辨率成像成为可能，这是一种很少被报道的方法。事实上，我能够探测各种电化学界面，包括从非水电解质中出现的石墨电极和卤化物修饰的金表面。与提供平均（电极水平）信息的研究相反，这里的方法可用于从电化学装置中电极设计的角度阐明所需的局部结构。

项目成果

Stepping beyond Cyclic Voltammetry: Obtaining the Electronic Properties of Electrified Solid-Liquid Interfaces

超越循环伏安法：获得带电固液界面的电子特性

• 发表时间: 2022
• 作者: Raymond A. Wong;Yasuyuki Yokota;Mitsuru Wakisaka;Junji Inukai;Yousoo Kim
• 通讯作者: Yousoo Kim

Stepping beyond cyclic voltammetry: Obtaining the electronic and structural properties of electrified solid-liquid interfaces

超越循环伏安法：获得带电固液界面的电子和结构特性

• DOI: 10.1016/j.coelec.2022.100964
• 发表时间: 2022
• 期刊: Current Opinion in Electrochemistry
• 影响因子: 8.5
• 作者: Wong Raymond A.;Yokota Yasuyuki;Kim Yousoo
• 通讯作者: Kim Yousoo

Chemical and Morphological Changes of Graphite Electrodes at Low Cathodic Potentials and its Relevance to Li-Ion Batteries

低阴极电位下石墨电极的化学和形态变化及其与锂离子电池的相关性

• 发表时间: 2022
• 作者: Raymond A. Wong;Yasuyuki Yokota;Emiko Kazuma;Motoyuki Oniki;Yousoo Kim
• 通讯作者: Yousoo Kim

Graphite Electrodes Immersed in Nonaqueous Li+ Electrolytes Studied with a Combined Ultrahigh Vacuum-Electrochemistry Approach

采用超高真空-电化学相结合的方法研究浸没在非水锂电解质中的石墨电极

• DOI: 10.1021/acs.jpcc.1c03645
• 发表时间: 2021
• 期刊: The Journal of Physical Chemistry C
• 作者: Wong Raymond A.;Yokota Yasuyuki;Kazuma Emiko;Oniki Motoyuki;Kim Yousoo
• 通讯作者: Kim Yousoo

Electrochemically-Induced Electronic and Structural Properties of the Electrode-Monolayer-Electrolyte Interface

电极-单层-电解质界面的电化学诱导电子和结构特性

• 发表时间: 2021
• 作者: Raymond A. Wong;Yasuyuki Yokota;Mitsuru Wakisaka;Junji Inukai;Yousoo Kim
• 通讯作者: Yousoo Kim