Copper Single Atom-Triggered Niobia–Ceria Catalyst for Efficient Low-Temperature Reduction of Nitrogen Oxides

Xie, Shaohua; Tan, Wei; Li, Yuejin; Ma, Lu; Ehrlich, Steven N.; Deng, Jiguang; Xu, Peng; Gao, Fei; Dong, Lin; Liu, Fudong

doi:10.1021/acscatal.1c05661

Title: Copper Single Atom-Triggered Niobia–Ceria Catalyst for Efficient Low-Temperature Reduction of Nitrogen Oxides

Journal Article · 02 February 2022 · ACS Catalysis

DOI: https://doi.org/10.1021/acscatal.1c05661 · OSTI ID:1846022

^[1];

^[2]; Li, Yuejin ^[3]; Ma, Lu ^[4]; Ehrlich, Steven N. ^[4];

^[5]; Xu, Peng ^[6];

^[7];

^[1]

Univ. of Central Florida, Orlando, FL (United States). Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC)
Univ. of Central Florida, Orlando, FL (United States). Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), NanoScience Technology Center (NSTC); Nanjing Univ. (China). Center of Modern Analysis, Key Lab. of Mesoscopic Chemistry, Jiangsu Key Lab. of Vehicle Emissions Control
BASF Corporation, Iselin, NJ (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
Beijing Univ. of Technology (China)
National Center for Nanoscience and Technology, Beijing (China). CAS Key Lab. of Standardization and Measurement for Nanotechnology
Nanjing Univ. (China). Center of Modern Analysis, Key Lab. of Mesoscopic Chemistry, Jiangsu Key Lab. of Vehicle Emissions Control

To reduce nitrogen oxide (NO_x) emission from diesel engines in the cold-start process benefitting the atmospheric environment, catalysts with superior low-temperature NO_x removal efficiency are highly demanded. Herein, we report an efficient Nb₂O₅/CuO/CeO₂ (NbCuCe) oxide catalyst for the selective catalytic reduction (SCR) of NO_x, showing much higher DeNO_x activity below 200 °C, superior sulfur resistance, faster response, and much less NH₃ slip than the state-of-the-art Cu-CHA zeolite catalyst. Additionally, atomically dispersed Cu species facilitate the strong interaction between Cu and the Nb/Ce base catalyst, which significantly improves the low-temperature redox properties at Cu–O–Ce sites and NH₃ adsorption/activation at Nb–O–Cu sites, thus contributing to the superior SCR performance of NbCuCe at low temperatures. The developed NbCuCe catalyst is highly promising for efficient DeNO_x from cold-start diesel engines and can be coupled with Cu-CHA to achieve a broad operation temperature window.

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Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012704

OSTI ID:: 1846022

Report Number(s):: BNL-222730-2022-JAAM

Journal Information:: ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 4 Vol. 12; ISSN 2155-5435

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
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Title: Copper Single Atom-Triggered Niobia–Ceria Catalyst for Efficient Low-Temperature Reduction of Nitrogen Oxides

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