What question did this study set out to answer?

This research aims to understand how the electron beam affects electrocatalytic reactivity during hydrogen evolution reactions on Pt nanoaggregates.

May 7, 2026

Hydrogen Evolution Reaction on Pt Nanoaggregates by Operando Scanning Transmission Electron Microscopy: The Electron Beam, Friend or Foe?

Key Points

This research aims to understand how the electron beam affects electrocatalytic reactivity during hydrogen evolution reactions on Pt nanoaggregates.
Utilized operando scanning transmission electron microscopy (STEM) to observe catalysts.
Evaluated the impact of electron beam on electrocatalytic performance while identifying intermediates.
Developed a framework to quantify catalytic yields in EC-(S)TEM.
The electron beam significantly influences apparent electrocatalytic reactivity.
A framework for cautious interpretation of operando data was established.
Quantitative analysis suggests that current methodologies may overlook critical interactions.

Abstract

intermediates and allows discrimination of the respective contributions of the HER and the electron beam. These results highlight the critical role of the beam in apparent electrocatalytic reactivity and provide a framework to quantify catalytic yields in EC-(S)TEM and to interpret operando data more cautiously.

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Cite This Study

Daviddi et al. (Mon,) studied this question.

synapsesocial.com/papers/69fc2c718b49bacb8b34804d https://doi.org/https://doi.org/10.1021/acsnano.5c16032

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