Dual-Site Single-Atom Catalysts with High Performance for Three-Way Catalysis

Xuan Zhou; Kai Han; Kai Li; Jing Pan; Xiao Wang; Weidong Shi; Shuyan Song; Hongjie Zhang

doi:10.1002/adma.202201859

Dual-Site Single-Atom Catalysts with High Performance for Three-Way Catalysis

Adv Mater. 2022 May;34(20):e2201859. doi: 10.1002/adma.202201859. Epub 2022 Apr 18.

Authors

Xuan Zhou^{1

2}, Kai Han³, Kai Li^{1

2}, Jing Pan¹, Xiao Wang^{1

2}, Weidong Shi⁴, Shuyan Song^{1

2}, Hongjie Zhang^{1

2

5}

Affiliations

¹ State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, China.
² School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei, 230026, China.
³ College of Chemistry and Chemical Engineering, Central South University, Hunan, 410083, China.
⁴ School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
⁵ Department of Chemistry, Tsinghua University, Beijing, 100084, China.

PMID: 35324043
DOI: 10.1002/adma.202201859

Abstract

In response to growing levels of air pollution and emission regulations, novel three-way catalysts (TWCs) with high efficiency are highly coveted. Herein, a multi-step heating strategy to fabricate a unique dual-site catalyst composed of strongly coupled Pt and Pd atoms located in neighboring positions on the surface of CeO₂ is demonstrated. Outstanding three-way catalytic performance is demonstrated, especially for NO elimination. Based on comprehensive investigations, the enhancement is attributed to the strong interactions between the neighboring Pt and Pd atoms, which can separately serve as active sites for CO and NO adsorption, efficiently reducing the energy barrier and accelerating the reaction rate. These findings not only contribute to designing and constructing next-generation catalysts, but also provide a promising opportunity to improve fuel efficiency and control emissions.

Keywords: CeO 2; NO elimination; dual-site catalysts; nanomaterials; three-way catalysts.

Abstract

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