Simultaneous NOx and particulate matter removal from diesel exhaust by hierarchical Fe-doped Ce-Zr-oxide

Y. Cheng; W. Song; J. Liu; H. Zheng; Z. Zhao; C. Xu; Y. Wei; E.J.M. Hensen

doi:10.1021/acscatal.6b03387

Simultaneous NOx and particulate matter removal from diesel exhaust by hierarchical Fe-doped Ce-Zr-oxide

Y. Cheng, W. Song, J. Liu, H. Zheng, Z. Zhao, C. Xu, Y. Wei, E.J.M. Hensen

Inorganic Materials & Catalysis

Onderzoeksoutput: Bijdrage aan tijdschrift › Tijdschriftartikel › Academic › peer review

71 Citaten (Scopus)

272 Downloads (Pure)

Samenvatting

Particulate matter and NOx emissions from diesel exhaust remains one of the most pressing environmental problems. We explore the use of hierarchically ordered mixed Fe–Ce–Zr oxides for the simultaneous capture and oxidation of soot and reduction of NOx by ammonia in a single step. The optimized material can effectively trap the model soot particles in its open macroporous structure and oxidize the soot below 400 °C while completely removing NO in the 285–420 °C range. Surface characterization and DFT calculations emphasize the defective nature of Fe-doped ceria. The isolated Fe ions and associated oxygen vacancies catalyze facile NO reduction to N2. A mechanism for the reduction of NO with NH3 on Fe-doped ceria is proposed involving adsorbed O2. Such adsorbed O2 species will also contribute to the oxidation of soot.

Originele taal-2	Engels
Pagina's (van-tot)	3883–3892
Aantal pagina's	10
Tijdschrift	ACS Catalysis
Volume	7
Nummer van het tijdschrift	6
DOI's	https://doi.org/10.1021/acscatal.6b03387
Status	Gepubliceerd - jun. 2017

Toegang tot document

10.1021/acscatal.6b03387Licentie: CC BY-NC-ND

Manuscript revisedFinale auteursversie , 2,47 MB
Supporting Information revisedFinale auteursversie , 1,45 MB
publisher versionDefinitieve gepubliceerde versie, 9,42 MBLicentie: CC BY-NC-ND

Andere bestanden en links

Link to publication in Scopus

Citeer dit

@article{8eaf4da532bf4deab5bc641097e7ef0a,

title = "Simultaneous NOx and particulate matter removal from diesel exhaust by hierarchical Fe-doped Ce-Zr-oxide",

abstract = "Particulate matter and NOx emissions from diesel exhaust remains one of the most pressing environmental problems. We explore the use of hierarchically ordered mixed Fe–Ce–Zr oxides for the simultaneous capture and oxidation of soot and reduction of NOx by ammonia in a single step. The optimized material can effectively trap the model soot particles in its open macroporous structure and oxidize the soot below 400 °C while completely removing NO in the 285–420 °C range. Surface characterization and DFT calculations emphasize the defective nature of Fe-doped ceria. The isolated Fe ions and associated oxygen vacancies catalyze facile NO reduction to N2. A mechanism for the reduction of NO with NH3 on Fe-doped ceria is proposed involving adsorbed O2. Such adsorbed O2 species will also contribute to the oxidation of soot.",

keywords = "NO reduction, ceria, doping, macropores, soot oxidation, NOx reduction",

author = "Y. Cheng and W. Song and J. Liu and H. Zheng and Z. Zhao and C. Xu and Y. Wei and E.J.M. Hensen",

year = "2017",

month = jun,

doi = "10.1021/acscatal.6b03387",

language = "English",

volume = "7",

pages = "3883–3892",

journal = "ACS Catalysis",

issn = "2155-5435",

publisher = "American Chemical Society",

number = "6",

}

TY - JOUR

T1 - Simultaneous NOx and particulate matter removal from diesel exhaust by hierarchical Fe-doped Ce-Zr-oxide

AU - Cheng, Y.

AU - Song, W.

AU - Liu, J.

AU - Zheng, H.

AU - Zhao, Z.

AU - Xu, C.

AU - Wei, Y.

AU - Hensen, E.J.M.

PY - 2017/6

Y1 - 2017/6

N2 - Particulate matter and NOx emissions from diesel exhaust remains one of the most pressing environmental problems. We explore the use of hierarchically ordered mixed Fe–Ce–Zr oxides for the simultaneous capture and oxidation of soot and reduction of NOx by ammonia in a single step. The optimized material can effectively trap the model soot particles in its open macroporous structure and oxidize the soot below 400 °C while completely removing NO in the 285–420 °C range. Surface characterization and DFT calculations emphasize the defective nature of Fe-doped ceria. The isolated Fe ions and associated oxygen vacancies catalyze facile NO reduction to N2. A mechanism for the reduction of NO with NH3 on Fe-doped ceria is proposed involving adsorbed O2. Such adsorbed O2 species will also contribute to the oxidation of soot.

AB - Particulate matter and NOx emissions from diesel exhaust remains one of the most pressing environmental problems. We explore the use of hierarchically ordered mixed Fe–Ce–Zr oxides for the simultaneous capture and oxidation of soot and reduction of NOx by ammonia in a single step. The optimized material can effectively trap the model soot particles in its open macroporous structure and oxidize the soot below 400 °C while completely removing NO in the 285–420 °C range. Surface characterization and DFT calculations emphasize the defective nature of Fe-doped ceria. The isolated Fe ions and associated oxygen vacancies catalyze facile NO reduction to N2. A mechanism for the reduction of NO with NH3 on Fe-doped ceria is proposed involving adsorbed O2. Such adsorbed O2 species will also contribute to the oxidation of soot.

KW - NO reduction

KW - ceria

KW - doping

KW - macropores

KW - soot oxidation

KW - NOx reduction

UR - http://www.scopus.com/inward/record.url?scp=85020891550&partnerID=8YFLogxK

U2 - 10.1021/acscatal.6b03387

DO - 10.1021/acscatal.6b03387

M3 - Article

C2 - 28603656

SN - 2155-5435

VL - 7

SP - 3883

EP - 3892

JO - ACS Catalysis

JF - ACS Catalysis

IS - 6

ER -

Simultaneous NOx and particulate matter removal from diesel exhaust by hierarchical Fe-doped Ce-Zr-oxide

Samenvatting

Toegang tot document

Andere bestanden en links

Vingerafdruk

Citeer dit