2024年8月1日 · Unambiguous insights demand nanometric morphological information of catalysts during electrocatalysis. Electrochemical scanning tunneling microscopy (EC-STM) effectively achieves this goal by probing the atomic and molecular structure of active sites under real reaction conditions.

The electrochemical scanning tunneling microscope (EC-STM) is a scanning tunneling microscope that measures the structures of surfaces and electrochemical reactions in solid-liquid interfaces at atomic or molecular scales.

2014年6月10日 · secm和ec-stm都是微区电化学的常用手段，两个都需要样品在溶液中测试，但是两者有很明显的区别： secm: 测量的是样品表面上方一定距离内溶液中离子的浓度，并且可以分辨是何种离子，例如h+离子，al3+离子等。很多教科书中用“化学灵敏性”来描述他。

2013年10月4日 · EC-STM configuration, the bipotentiostat controls potential of tip and sample with respect to reference electrode. The main purpose of the potentiostat is to control the potential of the electrode in an electrochemical cell from various …

ec-stm和ec-afm能够原位表征电催化过程中的纳米尺度表面结构演变及吸附/脱附过程, 但无法直接测量局部电化学活性(法拉第电流). 通过SECM和SECCM可以检测微区电化学信号, 并获得电化学通量和电化学反应动力学信息, 可作为EC-STM和EC-AFM的补充技术.

Scanning tunneling microscopy (STM) has gained increasing attention in the field of electrocatalysis due to its ability to reveal electrocatalyst surface structures down to the atomic level in either ultra-high-vacuum (UHV) or harsh electrochemical conditions.

随着ec-stm在原位操作上的设备和技术地不断发展和革新，ec-stm可以获取电解质溶液中的单晶金属和金属合金的原子分辨率stm图像，以及提供催化剂表面结构与电催化性能相关的关键特性，包括表面吸附位点、活性、选择性和稳定性，从而实现对理想电催化剂材料 ...

2025年2月13日 · In 2017, Pfisterer et al. [1] demonstrated the power of tunneling current-noise analysis in electrochemical scanning tunneling microscopy (n-EC-STM) to detect active centers under reaction conditions. In this work, a new analytical tool has been developed to further enhance the distinction of active domains on catalytic surfaces.

An example of such a technique is electrochemical scanning tunneling microscopy (EC-STM), which relates locally confined noise features to local electrocatalytic activity. In this work, we spotlight recent achievements of this technique with respect to palladium (Pd) surfaces for the hydrogen reduction reaction, where strain due to hydride ...

2021年11月3日 · Scanning probe microscopy (SPM) is a powerful tool for visualizing the surface properties and localized electrochemical activity down to the atomic scale in situ and even operando, thus plays an essential role in studying heterogeneous electrocatalysis mechanisms.