Design and Synthesis of Highly-Dispersed WO3 Catalyst with Highly Effective NH3-SCR Activity for NOx Abatement

Haidi Xu; Jixing Liu; Zihao Zhang; Shuang Liu; Qinjing Lin; Yun Wang; Sheng Dai; Yaoqiang Chen

doi:10.1021/acscatal.9b03503

Design and Synthesis of Highly-Dispersed WO₃ Catalyst with Highly Effective NH₃-SCR Activity for NO_x Abatement

Haidi Xu
, Jixing Liu
, Zihao Zhang
, Shuang Liu
, Qinjing Lin
, Yun Wang
, Sheng Dai
, Yaoqiang Chen

Nanomaterials Chemistry Group

Research output: Contribution to journal › Article › peer-review

61 Scopus citations

Abstract

The development of high-efficiency catalysts, especially for selective catalytic reduction of NO_x with NH₃ (NH₃-SCR) catalysts, with outstanding low-temperature catalytic reactivity and impressive lifetime remains a great challenge in the field of eliminating vehicle engine exhausts. Herein, we present a novel gas-bubbling-assisted dispersed hybrid nanocrystal-assisted hydrothermal deposition (GBD-HNHD) strategy to fabricate a W@CeZrAlO_x catalyst with highly dispersed WO₃ nanocrystals (10 wt %) (W@CZA-HNHD). Compared with the W/CeZrAlO_x catalyst prepared with the impregnation method (W@CZA-IM), W@CZA-HNHD not only exhibits highly effective low-temperature deNO_x activity (the light-off temperature being lowered 45 °C) but also shows an exceptional stability (100 h time-on-stream testing with seven measurement cycles) and long lifetime (compares well with 135 »000 miles). This work not only provides a new route to prepare an advanced catalyst with high loading isolated active sites but also lays a foundation for optimizing the utilization efficiency of the catalytically active species in the practical applications.

Original language	English
Pages (from-to)	11557-11562
Number of pages	6
Journal	ACS Catalysis
Volume	9
Issue number	12
DOIs	https://doi.org/10.1021/acscatal.9b03503
State	Published - Dec 6 2019

Funding

This work was supported by National Natural Science Foundation of China (No. 21802099), National Key Research and Development Program of China (No. 2016YFC0204901), National Engineering Laboratory for Mobile Source Emission Control Technology (No. NELMS2017A06) Sichuan Science and Technology Program (No. 2018GZ0401). J.L., Z.Z. and S.D. were supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Chemical Sciences, Geosciences and Biosciences Division. H.X. also thanks the China Scholarship Council for financial support as a visiting scholar. Cesgigo Research Service Angency provides technical support for STEM, www.ceshigo.com. This work was supported by National Natural Science Foundation of China (No. 21802099), National Key Research and Development Program of China (No. 2016YFC0204901), National Engineering Laboratory for Mobile Source Emission Control Technology (No. NELMS2017A06), Sichuan Science and Technology Program (No. 2018GZ0401). J.L., Z.Z., and S.D. were supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division. H.X. also thanks the China Scholarship Council for financial support as a visiting scholar. “Cesgigo Research Service Angency” provides technical support for STEM, www.ceshigo.com .

Keywords

NO abatement
high density
high dispersion
selective catalytic reduction
tungsten

Access to Document

10.1021/acscatal.9b03503

Cite this

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title = "Design and Synthesis of Highly-Dispersed WO3 Catalyst with Highly Effective NH3-SCR Activity for NOx Abatement",

abstract = "The development of high-efficiency catalysts, especially for selective catalytic reduction of NOx with NH3 (NH3-SCR) catalysts, with outstanding low-temperature catalytic reactivity and impressive lifetime remains a great challenge in the field of eliminating vehicle engine exhausts. Herein, we present a novel gas-bubbling-assisted dispersed hybrid nanocrystal-assisted hydrothermal deposition (GBD-HNHD) strategy to fabricate a W@CeZrAlOx catalyst with highly dispersed WO3 nanocrystals (10 wt \%) (W@CZA-HNHD). Compared with the W/CeZrAlOx catalyst prepared with the impregnation method (W@CZA-IM), W@CZA-HNHD not only exhibits highly effective low-temperature deNOx activity (the light-off temperature being lowered 45 °C) but also shows an exceptional stability (100 h time-on-stream testing with seven measurement cycles) and long lifetime (compares well with 135 »000 miles). This work not only provides a new route to prepare an advanced catalyst with high loading isolated active sites but also lays a foundation for optimizing the utilization efficiency of the catalytically active species in the practical applications.",

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author = "Haidi Xu and Jixing Liu and Zihao Zhang and Shuang Liu and Qinjing Lin and Yun Wang and Sheng Dai and Yaoqiang Chen",

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AU - Lin, Qinjing

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AU - Dai, Sheng

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N2 - The development of high-efficiency catalysts, especially for selective catalytic reduction of NOx with NH3 (NH3-SCR) catalysts, with outstanding low-temperature catalytic reactivity and impressive lifetime remains a great challenge in the field of eliminating vehicle engine exhausts. Herein, we present a novel gas-bubbling-assisted dispersed hybrid nanocrystal-assisted hydrothermal deposition (GBD-HNHD) strategy to fabricate a W@CeZrAlOx catalyst with highly dispersed WO3 nanocrystals (10 wt %) (W@CZA-HNHD). Compared with the W/CeZrAlOx catalyst prepared with the impregnation method (W@CZA-IM), W@CZA-HNHD not only exhibits highly effective low-temperature deNOx activity (the light-off temperature being lowered 45 °C) but also shows an exceptional stability (100 h time-on-stream testing with seven measurement cycles) and long lifetime (compares well with 135 »000 miles). This work not only provides a new route to prepare an advanced catalyst with high loading isolated active sites but also lays a foundation for optimizing the utilization efficiency of the catalytically active species in the practical applications.

AB - The development of high-efficiency catalysts, especially for selective catalytic reduction of NOx with NH3 (NH3-SCR) catalysts, with outstanding low-temperature catalytic reactivity and impressive lifetime remains a great challenge in the field of eliminating vehicle engine exhausts. Herein, we present a novel gas-bubbling-assisted dispersed hybrid nanocrystal-assisted hydrothermal deposition (GBD-HNHD) strategy to fabricate a W@CeZrAlOx catalyst with highly dispersed WO3 nanocrystals (10 wt %) (W@CZA-HNHD). Compared with the W/CeZrAlOx catalyst prepared with the impregnation method (W@CZA-IM), W@CZA-HNHD not only exhibits highly effective low-temperature deNOx activity (the light-off temperature being lowered 45 °C) but also shows an exceptional stability (100 h time-on-stream testing with seven measurement cycles) and long lifetime (compares well with 135 »000 miles). This work not only provides a new route to prepare an advanced catalyst with high loading isolated active sites but also lays a foundation for optimizing the utilization efficiency of the catalytically active species in the practical applications.

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