UiO66-Derived Catalyst for Low Temperature Catalytic Reduction of NO with NH3

Ka-Ming Leung; Chi-Kin J Tsui; Ching-Kit Ho; Chang-Zhong Liao; Hei-Tung Yau; Kwong-Yu Chan; Chi-Ying V Li

doi:10.1021/acsomega.2c07110

UiO66-Derived Catalyst for Low Temperature Catalytic Reduction of NO with NH₃

ACS Omega. 2023 Mar 24;8(13):12362-12371. doi: 10.1021/acsomega.2c07110. eCollection 2023 Apr 4.

Authors

Ka-Ming Leung¹, Chi-Kin J Tsui¹, Ching-Kit Ho¹, Chang-Zhong Liao^{1

2}, Hei-Tung Yau¹, Kwong-Yu Chan¹, Chi-Ying V Li¹

Affiliations

¹ Department of Chemistry, The University of Hong Kong, Pokfulam, Hong Kong.
² State Key Laboratory of Featured Metal Materials and Life-cycle Safety for composite Structures, School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China.

Abstract

Diesel exhaust emissions are major outdoor air pollutants. Reducing the emission of NOx by diesel commercial vehicles and related machineries is at present a great challenge. In this study, we synthesize a catalyst for low-temperature catalytic reduction of NO using calcinated UiO-66(Zr) as a host for the doping of cerium, manganese, and titanium by the incipient wetness impregnation, followed by the dispersion of 1.0 wt % platinum. A solid solution of Ce_0.15Zr_0.54Mn_0.11Ti_0.20O₂/1.0Pt (CZMTO/Pt) is synthesized as evident by the structural characterizations. The catalyst demonstrates significant NO reduction in the laboratory due to the synergistic effect of various elements, with NO conversion above 80% at 160 °C.