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Best practices for in-situ and operando techniques within electrocatalytic systems.

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In-situ and operando techniques are crucial for understanding heterogeneous electrocatalysis. This work details best practices and interpretation of these methods to strengthen catalyst design and mechanistic understanding.

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Area of Science:

  • Heterogeneous electrocatalysis
  • In-situ and operando spectroscopy
  • Catalyst design

Background:

  • In-situ and operando techniques are vital for linking catalyst structure to activity.
  • Accurate execution and interpretation are critical for drawing strong conclusions.
  • Most reviews focus on technique application, not optimal execution and insight analysis.

Purpose of the Study:

  • To provide a nuanced discussion on the best practices for executing in-situ and operando techniques.
  • To analyze the level of insight obtainable from various experimental setups and controls.
  • To identify common pitfalls and offer strategies for avoidance and complementary experiments.

Main Methods:

  • Focus on vibrational (IR, Raman) spectroscopy, X-ray absorption spectroscopy, and electrochemical mass spectrometry.
  • Includes sections on reactor design and theoretical modeling applicable across techniques.
  • Discusses complementary experiments to enhance analytical strength.

Main Results:

  • Highlights common pitfalls in the application of in-situ and operando techniques.
  • Provides guidance on optimizing the execution of these experiments.
  • Identifies how to interpret results to maximize mechanistic understanding.

Conclusions:

  • Emphasizes the critical role of proper technique execution and interpretation in heterogeneous electrocatalysis.
  • Suggests complementary experiments and theoretical modeling to strengthen conclusions.
  • Outlines remaining gaps and future innovations needed for in-situ and operando techniques.