Boosting synergistic catalytic abatement of NOx and chlorobenzene via bidirectional promotion of Nb within asymmetrical Ce-O-Nb sites

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL Applied Catalysis A: General Pub Date : 2025-03-14 DOI:10.1016/j.apcata.2025.120223

Ziliang Wang , Mingming Gao , Xin Chen , Fuli Wang , Xiaonan Hu , Ming Xie , Aling Chen , Dengsong Zhang

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Abstract

The synergistic catalytic abatement of nitrogen oxides (NO_x) and chlorinated aromatic pollutants remains a significant challenge. The matching of the active temperature window and the trade-off between catalytic activity and selectivity are two principal issues to be concerned with. In this context, adding niobium oxide into the titania-supported cerium oxide (CeNbTi) catalyst markedly enhanced the synergistic catalytic activity and stability. The asymmetrical Ce-O-Nb structure was verified to be constructed on the CeNbTi catalyst. Nb demonstrated a dual modulation of redox and acidity, enabling a balance of dual sites for two cycles. This led to a simultaneous improvement in NH₃-SCR and chlorobenzene oxidation performance. In situ DRIFTS indicated a synergistic promotion mechanism that chlorobenzene oxidation utilizes highly reactive oxidizing species, reducing NH₃ excessive oxidation and lowering N₂O production from the NH₃-SCR pathway. This study offers a strategy via designing asymmetrical sites to develop catalysts for controlling multiple pollutants.

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来源期刊

Applied Catalysis A: General 化学-环境科学

CiteScore

9.00

自引率

5.50%

发文量

415

审稿时长

24 days

期刊介绍： Applied Catalysis A: General publishes original papers on all aspects of catalysis of basic and practical interest to chemical scientists in both industrial and academic fields, with an emphasis onnew understanding of catalysts and catalytic reactions, new catalytic materials, new techniques, and new processes, especially those that have potential practical implications. Papers that report results of a thorough study or optimization of systems or processes that are well understood, widely studied, or minor variations of known ones are discouraged. Authors should include statements in a separate section "Justification for Publication" of how the manuscript fits the scope of the journal in the cover letter to the editors. Submissions without such justification will be rejected without review.