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Insights into electrocatalysis by scanning tunnelling microscopy.

Xiang Wang1, Yu-Qi Wang1, Ya-Chen Feng1

  • 1CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Beijing National Laboratory for Molecular Science (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. wangd@iccas.ac.cn wanlijun@iccas.ac.cn and University of Chinese Academy of Sciences, Beijing 100049, China.

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Scanning tunnelling microscopy (STM) reveals atomic-scale insights into electrocatalyst surfaces and reaction mechanisms. This technique is crucial for designing advanced electrocatalysts for energy technologies and understanding catalytic active sites.

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Area of Science:

  • Surface science
  • Electrocatalysis
  • Nanotechnology

Background:

  • Understanding electrocatalytic reaction mechanisms is vital for developing efficient energy technologies.
  • Atomic-scale investigation of catalyst surfaces and processes aids in identifying active sites and advancing electrocatalyst development.

Purpose of the Study:

  • To systematically review the application of scanning tunnelling microscopy (STM) in electrocatalysis.
  • To summarize the construction of model electrocatalysts and electrocatalytic systems for STM studies.
  • To discuss STM investigations of electrocatalyst structures and surface processes.

Main Methods:

  • Utilizing scanning tunnelling microscopy (STM) for nanoscale surface topography and electronic property analysis.
  • Employing electrochemical STM to study surface processes during electrochemical reactions.
  • Identifying catalytic intermediates on catalyst surfaces using STM under low-temperature or ultrahigh vacuum conditions.

Main Results:

  • STM provides nanoscale resolution for investigating surface structures and electronic properties of electrocatalysts.
  • Electrochemical STM enables the study of dynamic surface processes during electrocatalytic reactions.
  • STM facilitates the identification of critical intermediates and the elucidation of structure-activity relationships in electrocatalysis.

Conclusions:

  • STM is a powerful tool for advancing electrocatalysis research by providing atomic-level understanding of catalyst behavior.
  • The review highlights the progress and potential of STM in designing and developing next-generation electrocatalysts.
  • Future developments in STM techniques will further enhance the study of complex electrocatalytic systems.