AUTHOR=Wang Ruidan , Zhong Chengming , Li Dong , Yu Xuehua , Zhao Zhen , Sojka Zbigniew , Kotarba Andrzej , Wei Yuechang , Liu Jian 

TITLE=Preparation of 3DOM ZrTiO4 Support, WxCeMnOδ/3DOM ZrTiO4 Catalysts, and Their Catalytic Performance for the Simultaneous Removal of Soot and NOx

JOURNAL=Frontiers in Chemistry

VOLUME=10

YEAR=2022

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2022.880884

DOI=10.3389/fchem.2022.880884

ISSN=2296-2646

ABSTRACT=<p>As an efficient and durable engine, a diesel engine has a broad application. However, soot particles (PM) and nitrogen oxides (NO<sub>x</sub>) coming from diesel engines are the main causes of air pollution, so it is necessary to design and prepare an effective catalyst for the simultaneous elimination of PM and NO<sub>x</sub>. In this work, a novel 3DOM ZrTiO<sub>4</sub> support and a series of W<sub>x</sub>CeMnO<sub>δ</sub>/3DOM ZrTiO<sub>4</sub> catalysts (where x indicates the wt% of W) were designed and fabricated by the colloidal crystal template technique. Among the as-prepared catalysts, the W<sub>1</sub>CeMnO<sub>δ</sub>/3DOM ZrTiO<sub>4</sub> catalyst exhibits the highest NO conversion rate (52%) at the temperature of maximum CO<sub>2</sub> concentration (474°C) and achieves 90% NO conversion in the temperature range of 250–396°C. The excellent catalytic performance is associated with the macroporous structure, abundant oxygen vacancies, sufficient acid sites, and the synergistic effect among the active components. The possible reaction mechanisms of W<sub>x</sub>CeMnO<sub>δ</sub>/3DOM ZrTiO<sub>4</sub> catalysts were also discussed based on the characterization results.</p>