High-entropy perovskite heterojunction photocatalyst

93.47% CH₄ selectivity

Interfacial Cu⁰ electron highway lowers the CH₄ formation barrier, enabling efficient CO₂ methanation without sacrificial agents.

79533439 · Zhang, Shaobo · Jing, Niu · Fang, Li · Guo, Yanxia · Ma, Zhibin · Fangqin, Cheng

Journal of Cleaner Production 2026

Specifications

CH₄ production rate

{'zh': '36.60', 'en': '36.60'} μmol g⁻¹ h⁻¹

CH₄ selectivity

{'zh': '93.47', 'en': '93.47'} %

Advantages

CH₄ selectivity of 93.47%

DFT calculations reveal the Gibbs free energy path for CH₄ production is significantly lower than that for CO, directing the reaction to methane.

No sacrificial agent needed

The reaction proceeds under simulated solar irradiation without any sacrificial agent, closer to practical application.

Efficient charge separation

KPFM confirms an internal electric field and S-scheme charge transfer pathway, enhancing interfacial charge transfer and separation of photogenerated pairs.

More oxygen vacancies

Lattice distortion in LMO generates abundant oxygen vacancies, facilitating CO₂ adsorption and activation.

Applications

• photocatalytic CO₂ reduction：Achieves 93.47% CH₄ selectivity in CO₂ reduction, replacing non-selective photocatalysts.
• methanation catalyst：Efficient methanation without sacrificial agents, simplifying setups and lowering costs.
• high-entropy oxide catalysis：High-entropy lattice distortion creates oxygen vacancies that boost CO₂ activation.
• artificial photosynthetic fuels：Converts CO₂ to CH₄ under simulated sunlight, enabling fuel production via artificial photosynthesis.