Effect of Metal Oxides (CeO, ZnO, TiO, and AlO) As the Support for Silver-Supported Catalysts on the Catalytic Oxidation of Diesel Particulate Matter

Overview

Journal ACS Omega

Publisher American Chemical Society

Specialty Chemistry

Date 2024 May 6

PMID 38708233

Authors

Punya Promhuad

Boonlue Sawatmongkhon

Kampanart Theinnoi

Thawatchai Wongchang

Nuwong Chollacoop

Ekarong Sukjit

Sarayut Tunmee

Athanasios Tsolakis

Affiliations

Soon will be listed here.

Abstract

This work presented the influence of metal oxides as the support for silver-supported catalysts on the catalytic oxidation of diesel particulate matter (DPM). The supports selected to be used in this work were CeO (reducible), ZnO (semiconductor), TiO (reducible and semiconductor), and AlO (acidic). The properties of the synthesized catalysts were investigated using XRD, TEM, H-TPR, and XPS techniques. The DPM oxidation activity was performed using the TGA method. Different states of silver (e.g., Ag° and Ag) were formed with different concentrations and affected the performance of the DPM oxidation. AgO and lattice oxygen, which were mainly generated by Ag/ZnO and Ag/CeO, were responsible for combusting the VOCs. The metallic silver (Ag°) formed primarily on Ag/AlO and Ag/TiO was the main component promoting soot combustion. Contact between the catalyst and DPM had a minor effect on VOC oxidation but significantly affected the soot oxidation activity.

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