Zeolite-promoted platinum catalyst for efficient reduction of nitrogen oxides with hydrogen.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39284804.
- Also identified by DOI 10.1038/s41467-024-52382-7 and PMC identifier 11405393.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Internal combustion engine fueled by carbon-free hydrogen (H<sub>2</sub>-ICE) offers a promising alternative for sustainable transportation. Herein, we report a facile and universal strategy through the physical mixing of Pt catalyst with zeolites to significantly improve the catalytic performance in the selective catalytic reduction of nitrogen oxides (NO<sub>x</sub>) with H<sub>2</sub> (H<sub>2</sub>-SCR), a process aiming at NO<sub>x</sub> removal from H<sub>2</sub>-ICE. Via the physical mixing of Pt/TiO<sub>2</sub> with Y zeolite (Pt/TiO<sub>2</sub> + Y), a remarkable enhancement of NO<sub>x</sub> reduction activity and N<sub>2</sub> selectivity was simultaneously achieved. The incorporation of Y zeolite effectively captured the in-situ generated water, fostering a water-rich environment surrounding the Pt active sites. This environment weakened the NO adsorption while concurrently promoting the H<sub>2</sub> activation, leading to the strikingly elevated H<sub>2</sub>-SCR activity and N<sub>2</sub> selectivity on Pt/TiO<sub>2</sub> + Y catalyst. This study provides a unique, easy and sustainable physical mixing approach to achieve proficient heterogeneous catalysis for environmental applications.