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Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
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Solar-Driven Electrochemical Green Fuel Production from CO2 and Water Using Ti3C2Tx MXene-Supported CuZn and NiCo Catalysts
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Securing interfacial cationic copper for acidic CO2 reduction to ethylene.

Sifan Wang1,2, Zhecheng Fang1,2, Can Yu3

  • 1Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China.

Nature Communications
|November 28, 2025
PubMed
Summary
This summary is machine-generated.

This study introduces a novel YSZ/CuO catalyst that stabilizes cationic copper (Cuδ+) for efficient CO2 electroreduction to ethylene in acidic conditions. This interface engineering prevents catalyst degradation, enhancing ethylene production.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Electrocatalytic reduction of carbon dioxide (CO2) to valuable products like ethylene is crucial for sustainable energy.
  • Copper-based catalysts are promising but face challenges with cationic copper (Cuδ+) stability in acidic media.

Purpose of the Study:

  • To develop a catalyst that stabilizes cationic copper species under acidic CO2 electroreduction conditions.
  • To enhance the selectivity and efficiency of ethylene production from CO2.

Main Methods:

  • Interface engineering using yttrium-doped ZrO2 and CuO (YSZ/CuO) catalyst.
  • In-situ characterization techniques.
  • Theoretical calculations.

Main Results:

  • The YSZ/CuO catalyst successfully stabilized cationic Cuδ+, preventing over-reduction to Cu0.
  • Achieved a high faradaic efficiency of 68.7% for ethylene formation.
  • Demonstrated a partial current density of 545.0 mA·cm⁻² for ethylene production at pH 2.

Conclusions:

  • The YSZ/CuO interface effectively protects cationic copper catalysts in harsh acidic environments.
  • Oxygen vacancies in YSZ play a key role in stabilizing interfacial oxygen derived from CuO.
  • This interface engineering strategy offers a pathway for developing robust catalysts for heterogeneous catalysis.