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April 15, 2026Angewandte Chemie

Unraveling the Stability of N‐Doped Graphene Supported Single‐Atom and Dual‐Atom Catalysts From Pourbaix Diagram

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Authors

YMYan MengLZLixiang Zhong

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Overview

Theoretical evaluation reveals stability of single-atom catalysts in solutions, suggesting pathways for durable catalysts.

Key Points

  • This research aims to assess the electrochemical stability of n-doped graphene supported single-atom and dual-atom catalysts under varying pH and electric potentials.
  • Theoretical study of catalyst stability employing Pourbaix diagrams.
  • Assessment of electrochemical stability across five metals (Cr, Mn, Fe, Co, Ni).
  • Investigation of chemical speciation of leached metals including ions and hydroxides.
  • Development of Gibbs free-energy criteria for stability analysis.
  • Co- and Ni-SAC demonstrate excellent stability across various potentials and pH levels.
  • Co-SAC shows enhanced stability with adsorbates such as *H and *OH.
  • Fe-SAC is stable only with *H, *O, and *OOH under specific conditions.
  • Mn-SAC stability is limited to certain potentials with *O present.
  • Cr-SAC and dual-atom catalysts (Cr-, Mn-, Fe-DAC) fail to remain stable under all examined conditions.

Cite This Study

Meng et al. (2026) studied this question.

synapsesocial.com/papers/69df2abce4eeef8a2a6afce4https://doi.org/10.1002/ange.3532397
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