Unravelling the support-dependent active structures and SO2-tolerance of supported Pt catalysts to remediate toxic CO contaminant: An experimental and theoretical perspective

IF 4.7 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-03-23 DOI:10.1016/j.apcata.2025.120235

Xinyu Liu , Chengxiong Wang , Feng Feng , Yinglong Wu , Shiying Chang , Guangxin Liu , Dong Tian , Weinan Yang , Xianming Cheng , Dongxia Yang , Kongzhai Li , Yunkun Zhao

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引用次数: 0

Abstract

Catalyst deactivation caused by SO₂ poisoning generally hinders commercial viability of CO oxidation catalysts in the field of industrial flue gas purification. XPS results, CO-DRIFTS spectra and DFT calculations suggested that Pt was highly-dispersed and remained the oxidative states on SnO₂ support, resulting in that the rate-determining step of CO oxidation is to clean up the adsorbed CO and PtS₂ species is readily formed in a SO₂-contained hydrothermal environment. It predominantly maintained metallic Pt⁰ in the Pt/WO₃ catalyst, thereby led to cleaning up the activated oxygen atoms as the rate-determining step. It is very difficult to remove the sulfur species in SO₂-poisoned catalysts within 600 °C and the mechanisms of CO oxidation are not affected by SO₂ poisoning for Pt/SnO₂ and Pt/WO₃ catalysts. These findings provide some significant insights to understand the mechanisms of CO oxidation and SO₂-tolerance.

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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.