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Temperature-programmed Deoxygenation of Acetic Acid on Molybdenum Carbide Catalysts
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Breaking the Humidity Barrier in Ozone Decomposition: Dual-Engineered Mn-Co Catalyst with Vacancy-Orbital Synergy
Lei Liu1, Ming Ouyang1, Ning Wu1
1School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China.
Environmental Science & Technology
|October 3, 2025
Summary
This study introduces a novel manganese-cobalt catalyst that effectively removes indoor ozone, even in humid conditions. The advanced design ensures stable performance for air purification without external energy input.
Area of Science:
- Catalysis
- Environmental Science
- Materials Science
Background:
- Ground-level ozone is a significant indoor air pollutant with health risks.
- Conventional manganese catalysts deactivate rapidly in humid environments due to water adsorption and intermediate blocking.
Purpose of the Study:
- To develop a stable and efficient catalyst for indoor ozone removal under humid conditions.
- To overcome the deactivation limitations of traditional manganese catalysts.
Main Methods:
- Atomic-level design of Mn3+/Co2+ sites with integrated vacancy defect engineering.
- Utilizing heterometallic orbital coupling to enhance catalytic activity.
- Employing in situ spectra and theoretical calculations to analyze surface properties and reaction pathways.
Main Results:
- The dual-engineering strategy successfully prevented humidity-induced deactivation.
- Altered surface electronic configuration, weakened water adsorption, and accelerated O2(2-) dissociation were observed.
- The catalyst demonstrated stable efficiency for over 100 hours under humid conditions without auxiliary energy.
Conclusions:
- The developed Mn3+/Co2+ catalyst offers a robust solution for indoor ozone pollution control.
- This energy-efficient catalytic approach is suitable for seamless integration into air purification systems.
- The findings pave the way for sustainable indoor air quality management.
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