Article(id=1309589035757174797, tenantId=1146029695717560320, journalId=1308397254396182630, issueId=1309589016928945013, articleNumber=null, orderNo=null, doi=10.3724/2097-213X.2026.JFCT.0005, pmid=null, cstr=32157.14.2097-213X.2026.JFCT.0051, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1766419200000, receivedDateStr=2025-12-23, revisedDate=1769270400000, revisedDateStr=2026-01-25, acceptedDate=1770652800000, acceptedDateStr=2026-02-10, onlineDate=1790159957111, onlineDateStr=2026-09-23, pubDate=1788969600000, pubDateStr=2026-09-10, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1790159957111, onlineIssueDateStr=2026-09-23, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1790159957111, creator=13701087609, updateTime=1790159957111, updator=13701087609, issue=Issue{id=1309589016928945013, tenantId=1146029695717560320, journalId=1308397254396182630, year='2026', volume='54', issue='9', pageStart='20250264-1753', pageEnd='20260189-1948', issueExtLink='null', onlineDate='null', pubDate='1788969600000', pubDateStr='2026-09-10', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1790159952623, creator='13701087609', updateTime=1790212381356, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1309808919069942755, tenantId=1146029695717560320, journalId=1308397254396182630, issueId=1309589016928945013, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1309808919069942756, tenantId=1146029695717560320, journalId=1308397254396182630, issueId=1309589016928945013, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=20250417-1873, endPage=20250417-1884, ext={EN=ArticleExt(id=1309589037401341966, articleId=1309589035757174797, tenantId=1146029695717560320, journalId=1308397254396182630, language=EN, title=Synergistic mechanism of Fe-Ce-Mn ternary oxides for wide-temperature NH
3-SCR, columnId=1309584899380703863, journalTitle=Journal of Fuel Chemistry and Technology, columnName=RESEARCH PAPER, runingTitle=null, highlight=null, articleAbstract=
Conventional V2O5-WO3/TiO2 catalysts for NH3-SCR suffer from poor low temperature activity, limited thermal stability, and toxicity associated with vanadium, which restrict their application under flexible operating conditions. In this work, a series of Fe-Ce-Mn ternary oxide catalysts were synthesized by a sol-gel route and evaluated for the NH3-SCR of NO in the temperature range of 150 to 400 ℃. The optimized composition Fe0.1Ce0.04Mn0.02 delivers more than 90% NO conversion between 150 and 350 ℃, while maintaining N2 selectivity above 80% even at elevated space velocity and under varied O2 concentrations and NH3/NO mol ratio feed ratios, indicating excellent tolerance to operating fluctuations. Structural and surface characterizations reveal uniformly distributed Fe, Ce and Mn species, a high specific surface area of about 160 m2/g, and a mesoporous network dominated by 4 to 5 nm pores, together with enriched surface adsorbed oxygen (Oα) and highly oxidized Fe3+/Ce4+/Mn4+ species. It synergizes with acidic sites to provide the surface chemistry foundation for NH3 adsorption activation and NOx surface conversion. In situ DRIFTS coupled with NH3-TPD, NO-TPD and DFT calculations reveal that NH3 preferentially adsorbs onto Lewis acid sites and undergoes deprotonation to form surface *NH2 species, while NO is converted into monodentate and bridging nitrate species via migratory surface adsorbed oxygen species. These nitrogen containing intermediates coexist isothermally within the 150–350 ℃ range and undergo in situ coupling via the key NH2NO intermediate, ultimately yielding N2 and H2O. Mn incorporation increases the density of electronic states near the Fermi level and significantly lowers the energy barriers for NH3 dehydrogenation and NH2 nitrate coupling, Gibbs free energy analysis indicates that the key step in this primary pathway is thermodynamically more favorable (with a lower ΔG), while the electronic structure (PDOS) reveals that charge transfer at the interface occurs more readily. Together, these findings collectively support this dominant reaction pathway. This study provides a rational design strategy for vanadium free NH3-SCR catalysts with broad temperature window activity.
, authors=Guangyao WANG, Yuchen LI, Rujin TIAN, Yanqing NIU
*, authorsList=Guangyao WANG, Yuchen LI, Rujin TIAN, Yanqing NIU, authorCompany=null, correspAuthors=Yanqing NIU, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2026 Journal of Fuel Chemistry and Technology. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1309589042199625777, articleId=1309589035757174797, tenantId=1146029695717560320, journalId=1308397254396182630, language=CN, title=Fe-Ce-Mn 三元氧化物宽温区NH
3-SCR协同机理研究, columnId=1309589024768099233, journalTitle=燃料化学学报(中英文), columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
针对传统V2O5-WO3/TiO2脱硝催化剂低温活性不足、热稳定性有限及钒毒性等问题,本研究通过溶胶凝胶法构建了一系列Fe-Ce-Mn三元氧化物NH3-SCR催化剂,并系统考察其在150−400 ℃下的脱硝性能与机理。结果表明,最优配比Fe0.1Ce0.04Mn0.02在150−350 ℃条件下NO转化率始终高于90%,在较高空速及不同O2体积分数、NH3/NO物质的量比条件下仍能兼顾高NO转化和超过80%的N2选择性,展现出优异的工况适应性。结构与表面表征显示,该三元体系具有均匀分散的Fe、Ce、Mn物种、约160 m2/g的高比表面积以及以4−5 nm细介孔为主的孔结构,同时富集表面活性氧Oα和高价Fe3+/Ce4+/Mn4+物种,并与酸性位点协同作用,为NH3吸附活化与NOx表面转化提供表面化学基础。原位DRIFTS联用NH3-TPD、NO-TPD及DFT计算结果表明,NH3优先吸附于Lewis酸位并发生去质子化生成表面*NH2物种,NO在可迁移表面吸附氧参与下转化为单齿及桥式硝酸盐物种。上述含氮中间体在150−350 ℃实现同温共存,并经由NH2NO关键中间体发生原位偶联,最终生成N2和H2O。Mn掺杂通过提升费米能级附近态密度并降低NH3去氢及NH2-硝酸盐偶联等关键步骤的能垒,自由能分析表明,该主通道关键步骤在热力学上更有利(ΔG更低),同时电子结构(PDOS)显示界面电荷转移更易发生,从而共同支持该主导反应通道。该研究为开发无钒宽温区NH3-SCR催化剂及其结构优化提供了可借鉴的设计思路。
, authors=王光耀, 李雨辰, 田如锦, 牛艳青
*, authorsList=王光耀, 李雨辰, 田如锦, 牛艳青, authorCompany=null, correspAuthors=牛艳青, authorNote=
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3-SCR), Keyword(id=1309589044112228432, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=CN, orderNo=3, keyword=宽温区), Keyword(id=1309589044175142993, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=CN, orderNo=4, keyword=原位DRIFTS), Keyword(id=1309589044267417682, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=CN, orderNo=5, keyword=DFT机理计算)], refs=[Reference(id=1309589047203430495, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=1, rfOrder=0, authorNames=null, journalName=null, refType=null, unstructuredReference=李东珂, 孙瑜雪, 韩宇, 等. 蜂窝陶瓷负载的Fe-Cr复合催化剂CO催化还原脱硝性能研究[J]. 燃料化学学报(中英文), 2025, 53(6): 927−934)., articleTitle=null, refAbstract=null), Reference(id=1309589047299899488, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, doi=null, pmid=null, pmcid=null, year=null, volume=null, issue=null, pageStart=null, pageEnd=null, url=null, language=null, rfNumber=1, rfOrder=1, authorNames=null, journalName=null, refType=null, unstructuredReference=LI Dongke, SUN Yuxue, HAN Yu, et al. Study on CO catalytic reduction DeNO
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x mesoporous amorphous oxides for low-temperature NH
3-SCR of NO[J]. ACS Catal, 2020, 10(16): 9034−9045., articleTitle=null, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1309589042459672626, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, xref=null, ext=[AuthorCompanyExt(id=1309589042472255539, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, companyId=1309589042459672626, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Key Laboratory of Thermo-Fluid Science and Engineering of MOE, Xi’an Jiaotong University, Xi’an 710049, China), AuthorCompanyExt(id=1309589042480644148, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, companyId=1309589042459672626, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=西安交通大学能源与动力工程学院 热流科学与工程教育部重点实验室, 陕西 西安 710049)])], figs=[ArticleFig(id=1309589044418412627, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=EN, label=Fig.1, caption=
Structural and textural characterization of Fe-Ce-Mn based catalysts: (a) XRD; (b), (c) SEM images and elemental mappings of Fe0.1Ce0.02 and Fe0.1Ce0.04Mn0.02; (d), (e) SEM images of Fe0.1Ce0.02 and Fe0.1Ce0.04Mn0.02 at different magnifications; (f), (g) N2 adsorption desorption isotherms; (h) BJH pore size distributions, figureFileSmall=S7pFnsIjXIRYC1UYOqAR2Q==, figureFileBig=J6Lvetz+f38b8nutyE0crg==, tableContent=null), ArticleFig(id=1309589044540047444, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=CN, label=图1, caption=
Fe-Ce-Mn基催化剂的结构与孔结构表征:(a) XRD;(b),(c) Fe0.1Ce0.02与Fe0.1Ce0.04Mn0.02的SEM图像及元素映射;(d),(e) Fe0.1Ce0.02与Fe0.1Ce0.04Mn0.02在不同放大倍数下的SEM图像;(f),(g) N2吸附-脱附等温线;(h) BJH孔径分布, figureFileSmall=S7pFnsIjXIRYC1UYOqAR2Q==, figureFileBig=J6Lvetz+f38b8nutyE0crg==, tableContent=null), ArticleFig(id=1309589046360375381, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=EN, label=Fig.2, caption=
Performance and mechanism analysis of Fe-Ce-Mn catalysts in NH3-SCR: (a) NO conversion as a function of temperature over Fe2O3, Fe0.1Cex and Fe0.1Ce0.04Mny; (b) In situ DRIFTS spectra of Fe0.1Ce0.04Mn0.02 after NH3 pre-adsorption followed by NO + O2; (c) In situ DRIFTS spectra of Fe0.1Ce0.04Mn0.02 after NO + O2 pre-adsorption followed by NH3; (d) Proposed NH3-SCR pathway and Gibbs free energy profiles on Fe0.1Ce0.04 and Fe0.1Ce0.04Mn0.02; (e) Projected density of states (PDOS) of Fe0.1Ce0.04; (f) Projected density of states (PDOS) of Fe0.1Ce0.04Mn0.02, figureFileSmall=2+eqsVinRKVseyAMC73ILw==, figureFileBig=lLkWIAiCD40igRWu2tXMEQ==, tableContent=null), ArticleFig(id=1309589046473621590, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=CN, label=图2, caption=
Fe-Ce-Mn催化剂NH3-SCR性能与机理解析:(a) Fe2O3、Fe0.1Cex与Fe0.1Ce0.04Mny催化剂NO转化率随温度变化;(b) Fe0.1Ce0.04Mn0.02在预吸附NH3后通入NO + O2的原位DRIFTS光谱谱图;(c) Fe0.1Ce0.04Mn0.02在预吸附NO + O2后通入NH3的原位DRIFTS光谱谱图;(d) Fe0.1Ce0.04与Fe0.1Ce0.04Mn0.02上NH3-SCR反应路径及吉布斯自由能变化;(e) Fe0.1Ce0.04的投影态密度(PDOS);(f) Fe0.1Ce0.04Mn0.02的投影态密度(PDOS), figureFileSmall=2+eqsVinRKVseyAMC73ILw==, figureFileBig=lLkWIAiCD40igRWu2tXMEQ==, tableContent=null), ArticleFig(id=1309589046549119063, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=EN, label=Fig.3, caption=
NH3-SCR activity and surface adsorption behavior of Fe-Ce-Mn based catalysts: (a) NH3 conversion rates of different catalysts as a function of temperature; (b) Effect of NH3/NO (molar ratio) on NO conversion at 200 ℃ over Fe0.1Ce0.04Mn0.02; (c) NH3-TPD profiles of Fe0.1Ce0.04 and Fe0.1Ce0.04Mn0.02; (d) NO-TPD profiles of Fe0.1Ce0.04 and Fe0.1Ce0.04Mn0.02; (e) In situ DRIFTS spectra of Fe0.1Ce0.04Mn0.02 after NH3 pre-adsorption followed by NO + O2; (f-1, f-2) 3D and contour DRIFTS plots corresponding to (e); (g) In situ DRIFTS spectra after NO + O2 pre-adsorption followed by NH3; (h-1, h-2) 3D and contour DRIFTS plots corresponding to (g), figureFileSmall=QcUUuiDD2IKe48lTvXth9A==, figureFileBig=BoyMQgQ5pPfCaBoxMaFvhA==, tableContent=null), ArticleFig(id=1309589046641393752, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=CN, label=图3, caption=
Fe-Ce-Mn基催化剂NH3-SCR活性及表面吸附行为:(a) 不同催化剂NH3转化率随温度变化;(b) 200 ℃时NH3/NO摩尔比对Fe0.1Ce0.04Mn0.02催化剂NO转化率的影响;(c) Fe0.1Ce0.04与Fe0.1Ce0.04Mn0.02的NH3-TPD谱图;(d) Fe0.1Ce0.04与Fe0.1Ce0.04Mn0.02的NO-TPD谱图;(e) Fe0.1Ce0.04Mn0.02在预吸附NH3后通入NO + O2的原位DRIFTS光谱谱图;(f-1, f-2)对应(e)的三维及等高线DRIFTS谱图;(g) Fe0.1Ce0.04Mn0.02在预吸附NO + O2后通入NH3的原位DRIFTS谱图;(h-1, h-2)对应(g)的三维及等高线DRIFTS谱图, figureFileSmall=QcUUuiDD2IKe48lTvXth9A==, figureFileBig=BoyMQgQ5pPfCaBoxMaFvhA==, tableContent=null), ArticleFig(id=1309589046729474137, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=EN, label=Fig.4, caption=
N2 selectivity and effects of reaction conditions for Fe-Ce-Mn catalysts: (a) N2 selectivity varies with temperature for different catalysts; (b) Effect of O2 concentration on NO conversion at 200 ℃; (c) Effect of space velocity on NO conversion at 200 ℃, figureFileSmall=bfrAKIZEevopURLHUWju8w==, figureFileBig=Fzv6QovamaFxQnCaUnbzkQ==, tableContent=null), ArticleFig(id=1309589046813360218, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=CN, label=图4, caption=
Fe-Ce-Mn 催化剂NH3-SCR选择性及反应条件影响:(a) 不同催化剂N2选择性随温度变化;(b) 200 ℃时O2体积分数对NO转化率的影响;(c)200 ℃时空速对NO转化率的影响, figureFileSmall=bfrAKIZEevopURLHUWju8w==, figureFileBig=Fzv6QovamaFxQnCaUnbzkQ==, tableContent=null), ArticleFig(id=1309589046888857691, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=EN, label=Fig.5, caption=
(a) Summary of the XPS spectra; XPS spectra of (b) O 1s; (c) Fe 2p; (d) Ce 3d and (e) Mn 2p, figureFileSmall=bSF0/5EPF+WpPMYmZNhszA==, figureFileBig=IKBaRSYRmf9B9XSnOG2krg==, tableContent=null), ArticleFig(id=1309589046951772252, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=CN, label=图5, caption=
(a) XPS光谱汇总;(b) O 1s光谱;(c) Fe 2p光谱;(d) Ce 3d光谱;(e) Mn 2p光谱, figureFileSmall=bSF0/5EPF+WpPMYmZNhszA==, figureFileBig=IKBaRSYRmf9B9XSnOG2krg==, tableContent=null), ArticleFig(id=1309589047023075421, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=EN, label=Fig.6, caption=
H2-TPR and O2-TPD profiles of Fe0.1Ce0.04 and Fe0.1Ce0.04Mn0.02 catalysts, figureFileSmall=5Szx424bA3HveiuwjbT11A==, figureFileBig=qAmr813pes5z5J5/1KDfBQ==, tableContent=null), ArticleFig(id=1309589047098572894, tenantId=1146029695717560320, journalId=1308397254396182630, articleId=1309589035757174797, language=CN, label=图6, caption=
Fe0.1Ce0.04与Fe0.1Ce0.04Mn0.02催化剂的H2-TPR与O2-TPD表征(a): H2-TPR; (b): O2-TPD.
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