Insight into the promotional mechanism of Cu modification towards wide-temperature NH<sub>3</sub>-SCR performance of NbCe catalyst

Dongqi An; Yuyao Yang; Weixin Zou; Yandi Cai; Qing Tong; Jingfang Sun; Lin Dong

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Insight into the promotional mechanism of Cu modification towards wide-temperature NH₃-SCR performance of NbCe catalyst

Catalysis, Kinetics and Reaction Engineering | Updated：2026-01-06

- Insight into the promotional mechanism of Cu modification towards wide-temperature NH₃-SCR performance of NbCe catalyst
- Chinese Journal of Chemical Engineering Vol. 50, Issue 10, Pages: 301-309(2022)
- Affiliations：
  
  1. Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering and Jiangsu Key Laboratory of Vehicle Emissions Control, Nanjing University,Nanjing,China,210093
  2. Center for Nanochemistry, College of Chemistry and Molecular Engineering, Peking University,Beijing,China,100871
  3. Jiangsu Key Laboratory of Vehicle Emissions Control, School of Environment, Nanjing University,Nanjing,China,210093
  4. Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis, Nanjing University,Nanjing,China,210093
  5. Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering and Jiangsu Key Laboratory of Vehicle Emissions Control, School of Environment, Center of Modern Analysis, Nanjing University,Nanjing,China,210093
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2022
- Accepted：
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-SCR performance of NbCe catalyst[J]. 中国化学工程学报, 2022, 50(10): 301-309.
DOI：

-SCR performance of NbCe catalyst[J]. 中国化学工程学报, 2022, 50(10): 301-309. DOI：

摘要

Abstract

A simple strategy of Cu modification was proposed to broaden the operation temperature window for NbCe catalyst. The best catalyst Cu

0.010

/Nb

presented over 90% NO conversion in a wide temperature range of 200-400 ℃ and exhibited an excellent H

O or/and SO

resistance at 275 ℃. To understand the promotional mechanism of Cu modification

the correlation among the “activity-structure-property” were tried to establish systematically. Cu species highly dispersed on NbCe catalyst to serve as the active component. The strong interaction among Cu

Nb and Ce promoted the emergence of NbO

and induced more Brønsted acid sites. And Cu modification obviously enhanced the redox behavior of the NbCe catalyst. Besides

EPR probed the Cu species exited in the form of monomeric and dimeric Cu

the isolated Cu

acted as catalytic active sites to promote the reaction: Cu

-NO

+NO(g) → Cu

-NO

+NO

(g). Then the generated NO

would accelerate the fast-SCR reaction process and t

hus facilitated the low-temperature deNO efficiency. Moreover

surface nitrates became unstable and easy to decompose after Cu modification

thus providing additional adsorption and activation sites for NH

and ensuring the improvement of catalytic activity at high temperature. Since the NH

-SCR reaction followed by E-R reaction pathway efficaciously over Cu

0.010

/Nb

catalyst

the excellent H

O and SO

resistance was as expected.

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Insight into the promotional mechanism of Cu modification towards wide-temperature NH3-SCR performance of NbCe catalyst

DOI：

摘要

Abstract

关键词

Keywords

references

Insight into the promotional mechanism of Cu modification towards wide-temperature NH₃-SCR performance of NbCe catalyst