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Pt Atomic Chain: Local Asymmetry One-Dimensional Array for Enhanced Electrochemical Reactions.

Tianshu Chu1,2,3, Shuang Zhu4, Xuanning Zhang1,2,3

  • 1Shanghai Key Laboratory of Intelligent Sensing and Detection Technology, East China University of Science and Technology, Shanghai, China.

Advanced Materials (Deerfield Beach, Fla.)
|April 30, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel asymmetric platinum atomic chain (Pt AC) catalyst. This catalyst exhibits significantly enhanced hydrogen evolution reaction (HER) activity and superior dopamine sensing performance compared to traditional catalysts.

Keywords:
2D materialshydrogensensingsingle atom catalystsynergy effects

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Area of Science:

  • Materials Science
  • Catalysis
  • Nanotechnology

Background:

  • Atomically dispersed arrays boost catalysis via synergistic effects.
  • Uneven charge distribution in arrays hinders local asymmetric structures, limiting complex reaction efficiency.

Purpose of the Study:

  • To engineer an atomically dispersed array with local asymmetry for improved chemical reactions.
  • To investigate the catalytic and sensing performance of the novel asymmetric structure.

Main Methods:

  • Created ordered in-plane vacancies in Mo1.33C surface.
  • Promoted in situ substitution of Mo by Pt atoms to form Pt atomic chains (Pt AC).
  • Evaluated hydrogen evolution reaction (HER) activity and dopamine (DA) sensing performance.

Main Results:

  • Synthesized a locally asymmetric 1D sawtooth-shaped Pt atomic chain (Pt AC).
  • Pt AC demonstrated superior HER activity (12.52 A mgPt−1) compared to Pt single atoms (Pt SA) and commercial Pt/C.
  • Pt AC exhibited significantly higher sensitivity for dopamine detection compared to Pt SA.

Conclusions:

  • The asymmetric structure of Pt AC reduces energy barriers for hydrolysis and intermediate adsorption, enhancing HER activity.
  • The unique sites in Pt AC facilitate dopamine adsorption and oxidation, leading to high sensing performance.
  • This work provides a new strategy for designing atomically dispersed arrays with asymmetric structures for surface chemistry applications.