Boosted NH3 Selective Catalytic Oxidation Activity over V-Pt-Ti Catalysts: Insight into Preparation Method Effects
Yu Gao1, Lipeng Wang1, Kun Li1
1China Waterborne Transport Research Institute, Beijing 100088, China.
Materials (Basel, Switzerland)
|January 10, 2026
Summary
Precipitation methods yield superior V-Pt-Ti catalysts for ammonia selective catalytic oxidation (SCO). These catalysts show enhanced performance due to improved surface area, active sites, and redox properties.
Area of Science:
- Catalysis
- Materials Science
- Environmental Chemistry
Background:
- Ammonia selective catalytic oxidation (SCO) is crucial for environmental remediation.
- Developing efficient catalysts for SCO requires understanding synthesis method impacts.
Purpose of the Study:
- To investigate the influence of various synthesis methods on V-Pt-Ti catalyst performance for NH3 SCO.
- To identify the optimal preparation method for enhanced SCO activity.
Main Methods:
- Synthesis of V-Pt-Ti catalysts using impregnation (IP), precipitation (PC), sol-gel (SG), thermal decomposition (TD), and hydrothermal (HD) methods.
- Characterization using N2 adsorption/desorption, XPS, XRD, H2-TPR, NH3-TPD, O2-TPD, SEM, TEM, and in situ DRIFTS.
- Performance evaluation of NH3 SCO across a temperature range of 150-450 °C.
Main Results:
- V-Pt-Ti catalysts prepared by precipitation (VPT-PC) demonstrated significantly better SCO performance.
- VPT-PC catalysts exhibited larger surface area, higher Pt0, V5+, and Oα content, and more acid sites.
- Enhanced redox properties and participation of NO2 species in the reaction were observed for VPT-PC.
Conclusions:
- Precipitation method is optimal for synthesizing high-performance V-Pt-Ti catalysts for NH3 SCO.
- Catalyst properties like surface area, active species content, acidity, and redox behavior are key to SCO activity.
- Understanding reaction mechanisms, including NO2 involvement, aids in catalyst design for improved ammonia oxidation.
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