Citation: Jianing He, Xiao Wang, Zijian Wang, Ruize Jiang, Ke Wang, Rui Zhang, Huilin Wang, Baokang Geng, Hongyi Gao, Shuyan Song, Hongjie Zhang. Investigation on Cu promotion effect on Ce-based solid solution-anchored Rh single atoms for three-way catalysis[J]. Chinese Chemical Letters, ;2025, 36(2): 109640. doi: 10.1016/j.cclet.2024.109640 shu

Investigation on Cu promotion effect on Ce-based solid solution-anchored Rh single atoms for three-way catalysis

Jianing He ^{a, b} ,
Xiao Wang ^{a, b, *,} ,
Zijian Wang ^{a, b} ,
Ruize Jiang ^{a, b} ,
Ke Wang ^{a, b} ,
Rui Zhang ^{a, b} ,
Huilin Wang ^{a, b, *,} ,
Baokang Geng ^{a, b} ,
Hongyi Gao ^c ,
Shuyan Song ^{a, b, *,} ,
Hongjie Zhang ^{a, b, d}

a.
State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
b.
School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
c.
China School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
d.
Department of Chemistry, Tsinghua University, Beijing 100084, China

wangxiao@ciac.ac.cn

wanghl@ciac.ac.cn

songsy@ciac.ac.cn

Received Date: 14 December 2023
Revised Date: 30 January 2024
Accepted Date: 7 February 2024
Available Online: 10 February 2024

Figures(5)

The three-way catalyst (TWC), as a promising approach to control automobile exhaust emission, has been widely studied and applied. However, it still suffers from the high light-off temperature and poor stability. Herein, we synthesized a multicomponent catalyst Rh/Cu-CeSn by using Cu metal doping to modify the Ce-based solid solution, which exhibited good TWC catalytic performance: the light-off temperatures for CO, NO, and C₃H₆ conversion are 172 ℃, 266 ℃, and 193 ℃, respectively. Moreover, the catalyst still maintained good activity after 12 h of the continuous reaction under high-temperature conditions. The experiments and mechanism studies reveal that due to the redox pair Cu⁺/Cu²⁺, the Cu incorporation can effectively inhibit the Rh transition to the oxidation state and greatly enhance the catalytic activity and stability. This work provides a viable strategy for precise characteristic modulation of composite oxide supports during the fabrication of noble metal-based catalysts, which significantly reduces environmental pollution from energy applications.
- Three-way catalysts (TWC),
- Solid solution,
- Co-precipitation,
- Rhodium (Rh) catalyst,
- Oxygen vacancies
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