Zeolite-Promoted Platinum Catalyst for Efficient Reduction of Nitrogen Oxides With Hydrogen

Authors

Shaohua Xie
Liping Liu
Yuejin Li
Kailong Ye
Daekun Kim
Xing Zhang
Hongliang Xin
Lu Ma
Steven N Ehrlich
Fudong Liu

Publication Date

9-12-2024

Journal

Nature Communications

Abstract

Internal combustion engine fueled by carbon-free hydrogen (H2-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 (NOx) with H2 (H2-SCR), a process aiming at NOx removal from H2-ICE. Via the physical mixing of Pt/TiO2 with Y zeolite (Pt/TiO2 + Y), a remarkable enhancement of NOx reduction activity and N2 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 H2 activation, leading to the strikingly elevated H2-SCR activity and N2 selectivity on Pt/TiO2 + Y catalyst. This study provides a unique, easy and sustainable physical mixing approach to achieve proficient heterogeneous catalysis for environmental applications.

Keywords

Pollution remediation, Atmospheric chemistry, Heterogeneous catalysis

Comments

Supplementary Materials

Data Availability Statement

PMID: 39284804