Ultra-stable low-coordinated PtSA/CeZrO2 ordered macroporous structure integrated industrial-scale monolithic catalysts for high-temperature oxidation
Abstract
Abstract Platinum-group metals (Pt) commonly used in thermal catalytic processes often suffer from catalyst deactivation, such as Pt sintering, Pt overoxidation, and Pt loss under high-temperature conditions. To address these, we present a novel PtSA/CeZrO2 catalyst, featuring isolated Pt single atoms (PtSA) on a Ce0.8Zr0.2O2 support with an ordered macroporous (OM) structure. Firstly, Zr-stabilized dynamic low-coordinated PtSA releases more free d-electrons by reducing Pt-O bond occupation, thereby preserving peroxide activity at high temperatures and enhancing propane C–H activation. Additionally, the OM structure prevents Pt loss and reduces Pt loading to 0.4 gPt/L, compared with 0.9 gPt/L in commercial diesel oxidation catalysts. As a result, the PtSA/CeZrO2 maintains 92% conversion at 450 °C even after 50 h aging at 800 °C with 10 vol.% H2O. Finally, the catalyst is integrated into a 3.4-liter commercial cordierite monolith for developing and scaling robust catalytic converters.
Article Details
Authors (13)
Baojian Zhang
Rui Liu
Liangwei Li
Weihong Guo
Biluan Zhang
Bosheng Chen
Institute of Environmental and Applied Chemistry, College of Chemistry
Weidong Yuan
Pan Li
School of Electrical and Computer Engineering
Shaowen Zhang
Jinlong Wang
Institute of Environmental and Applied Chemistry, College of Chemistry
Ji Yang
New Cornerstone Science Laboratory, State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and National & Local Joint Engineering Research Center of Preparation Technology of Nanomaterials, College of Chemistry and Chemical Engineering
Zhu Luo
Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, Ministry of Education, College of Chemistry
Yanbing Guo
Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, Ministry of Education, College of Chemistry