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Enhancing NO-assisted oxygen desorption for efficient N2O decomposition by introducing iron into Co/β catalysts
Liangliang Zhang1, Minxia Yang2,3, Shize Hu2,3
1Engineering Research Center of Ministry of Education for Fine Chemicals, Shanxi University, Taiyuan, China. zhangliangliang@sxu.edu.cn.
Iron doping enhances cobalt catalysts for efficient nitrous oxide (N₂O) elimination. This catalytic decomposition method improves oxygen desorption and active site electronic structure, achieving 100% N₂O conversion.
Area of Science:
- Catalysis
- Environmental Chemistry
- Materials Science
Background:
- Direct catalytic decomposition is a green method for nitrous oxide (N₂O) elimination.
- Catalyst activity is often limited by slow oxygen desorption and suboptimal active site electronic structures.
Purpose of the Study:
- To investigate the effect of iron (Fe) doping on cobalt/beta-zeolite (Co/β) catalysts for N₂O decomposition.
- To regulate the microstructure of cobalt active sites and optimize oxygen desorption pathways.
Main Methods:
- Synthesis of Fe-doped Co/β catalysts.
- Characterization using XRD, TEM, XPS, and DR UV-Vis.
- In-situ FT-IR and N₂O-Temperature Programmed Desorption (TPD) experiments.
Main Results:
- Fe doping reduced CoOₓ particle size and enhanced catalyst reducibility and deoxygenation capacity.
- Fe-doped catalysts showed improved N₂O oxidation to NO and nitrate decomposition.
- The 1.0Fe-Co/β catalyst achieved 100% N₂O conversion at 420 °C, significantly outperforming Co/β (85%) and Fe/β (22%).
Conclusions:
- Fe doping effectively optimizes Co/β catalysts for N₂O decomposition by enhancing oxygen desorption.
- This study provides insights for designing advanced N₂O decomposition catalysts and understanding reaction mechanisms.
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