硫酸化SnO2促进FeVO4/ ceo2纳米片催化剂增强SCR脱氧性能，具有优异的SO2和H2O耐受性：不同硫酸化载体的影响

IF 4.8 2区化学 Q2 CHEMISTRY, PHYSICAL

Applied Catalysis A: General Pub Date : 2025-09-23 DOI:10.1016/j.apcata.2025.120597

Yuqiu Liu , Xuan Jia , Hongyu Zhao , Jianyi Zhang , Yanting Chen , Jinsheng Chen , Jinxiu Wang

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引用次数: 0

摘要

本文系统地研究了硫酸化SnO2、TiO2、ZrO2和SiO2对FeVO4/ ceo2纳米片的支撑作用。其中，FeVO4/CeO2-nanosheet/ su硫酸盐- sno2 （FeVCe/SSn）催化剂具有最宽的工作温度窗（227 ~ 422℃），NOx转化率超过90% %，N2选择性超过97 %，并且具有优异的SO2和H2O抗性（24 h的活性保持率超过90% %）。催化性能的顺序为：FeVCe/SSn >； FeVCe/STi >； FeVCe/SZr >； FeVCe/SSi，这与它们的氧化还原性能一致。FeVCe/SSn具有最好的氧化还原能力和第二高的表面酸度。由于硫酸化SnO2与FeVO4和CeO2纳米片的相互作用最为明显，表面氧空位显著增加；同时，硫酸化的SnO2提供了丰富的超酸性Brønsted酸位点和SnO2固有的Lewis酸位点。这种协同效应增强了NH3的吸附/活化，抑制了SO2的吸附，从而提高了SCR活性和抗SO2/H2O能力。机理研究表明，FeVCe/SSn上的SCR反应是由Eley-Rideal和Langmuir-Hinshelwood协同通路控制的。该研究表明，合理设计酸位密度以及载体与活性相之间的界面协同作用，是同时提供宽温度窗和高SO2/H2O耐久性的SCR催化剂的可行设计原则。

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Sulfated SnO2 promoted FeVO4/CeO2-nanosheet catalyst for enhanced SCR deNOx performance with superior SO2 and H2O tolerance: Effect of various sulfated supports

The support effect of sulfated SnO₂, TiO₂, ZrO₂, and SiO₂ on FeVO₄/CeO₂-nanosheet was systematically investigated in this work. Among them, FeVO₄/CeO₂-nanosheet/sulfated-SnO₂ (FeVCe/SSn) catalyst exhibited the widest operating temperature window (227–422 °C) with efficient NO_x conversion beyond 90 % and N₂ selectivity exceeding 97 %, as well as superior resistance to SO₂ and H₂O (above 90 % activity retention for 24 h). The catalytic performance followed the order: FeVCe/SSn > FeVCe/STi > FeVCe/SZr > FeVCe/SSi, which aligns well with their redox properties. FeVCe/SSn presents the best redox ability and the second highest surface acidity. Owing to the most pronounced interaction of sulfated SnO₂ with FeVO₄ and CeO₂ nanosheet, surface oxygen vacancies were significantly increased; simultaneously, sulfated SnO₂ provided abundant superacidic Brønsted acid sites and Lewis acid sites inherent to SnO₂. This synergistic effect enhanced NH₃ adsorption/activation and suppressed SO₂ adsorption, thereby improving SCR activity and SO₂/H₂O resistance. The plausible mechanistic studies reveal that the SCR reaction over FeVCe/SSn is governed by a synergistic Eley–Rideal and Langmuir–Hinshelwood pathway. This study demonstrates that the rational design of acid-site density and the interfacial synergy between support and active phase constitute a feasible design principle for SCR catalysts that simultaneously afford a broad temperature window and high SO₂/H₂O durability.

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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.