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Rational Design of a {InCu6} Heterometallic Oxo Cluster for Superior Proton Conduction: Mechanistic Insights and

Yongzhen Chen1, Yun-Zuo Cui2, Yi Zhang1

  • 1State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun, P. R. China.

Angewandte Chemie (International Ed. in English)
|April 28, 2026
PubMed
Summary

Researchers synthesized a novel Indium/Copper oxo cluster, {InCu6}, demonstrating exceptional proton conductivity. This breakthrough enables efficient power generation using humidity gradients.

Keywords:
cationic polymercopper‐based heterometallic clusterhumidity gradient‐based power generatorproton conductor

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Electrochemistry

Background:

  • Heterometallic oxo clusters are promising for energy applications.
  • Proton conductivity in materials is crucial for electrochemical devices.
  • Developing efficient humidity-based power generators remains a challenge.

Purpose of the Study:

  • To synthesize and characterize the first In3+/Cu2+ heterometallic oxo cluster.
  • To evaluate the proton conductivity of the new cluster.
  • To develop a functional device for humidity gradient-based power generation.

Main Methods:

  • Template-directed assembly for {InCu6} synthesis.
  • Proton conductivity measurements at varying relative humidity.
  • Density Functional Theory (DFT) calculations.
  • Fabrication of a composite film with a cationic polymer matrix.

Main Results:

  • Successful synthesis of the {InCu6} oxo cluster.
  • Achieved superior proton conductivity (7.95 × 10-2 S cm-1 at 90% RH).
  • DFT revealed In3+ enhances proton conduction kinetics.
  • Developed a functional generator with 0.63 V output at 92% RH.

Conclusions:

  • The {InCu6} cluster exhibits excellent proton conductivity due to In3+/Cu2+ synergy.
  • The developed composite film and generator demonstrate potential for humidity-based energy harvesting.
  • This work opens new avenues for designing advanced proton conductors.