Publication date: 21st July 2025
The rapid industrialization and overuse of automotive transportation have posed a major threat to the environment in the recent decades. Among the emitted pollutants, ammonia (NH3) poses a major threat to air quality and human health [1]. To minimize the NH3 pollution, materials that take part in the selective catalytic oxidation (SCO) of ammonia are being investigated and utilized. Platinum (Pt)-based catalysts are among the most promising candidates due to their high oxidation capabilities but their high manufacturing costs limit their industrial applicability [2-4].
In this study, we present a novel synthetic method of devising nanoporous catalysts of La0.985Ba0.015Al0.99Pt0.01O3/Al2O3. These catalysts exhibit high specific surface area and nanoscale composition. Combined with the exsolution of ultrasmall Pt nanoparticles as catalytic active sites, the SCO-NH3 is enhanced, utilizing only trace amounts of Pt. The findings highlight the importance of exsolution as possible SCO-NH3 catalysts that exhibit high catalytic activity, chemical stability, and affordability.
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