Conjugated dual size effect of core-shell particles synergizes bimetallic catalysis

Xiaohui Zhang, Zhihu Sun, Rui Jin, Chuwei Zhu, Chuanlin Zhao, Yue Lin, Qiaoqiao Guan, Lina Cao, Hengwei Wang, Shang Li, Hancheng Yu, Xinyu Liu, Leilei Wang, Shiqiang Wei (), Wei-Xue Li () and Junling Lu ()
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Xiaohui Zhang: University of Science and Technology of China
Zhihu Sun: University of Science and Technology of China
Rui Jin: University of Science and Technology of China
Chuwei Zhu: University of Science and Technology of China
Chuanlin Zhao: University of Science and Technology of China
Yue Lin: University of Science and Technology of China
Qiaoqiao Guan: University of Science and Technology of China
Lina Cao: University of Science and Technology of China
Hengwei Wang: University of Science and Technology of China
Shang Li: University of Science and Technology of China
Hancheng Yu: University of Science and Technology of China
Xinyu Liu: University of Science and Technology of China
Leilei Wang: University of Science and Technology of China
Shiqiang Wei: University of Science and Technology of China
Wei-Xue Li: University of Science and Technology of China
Junling Lu: University of Science and Technology of China

Nature Communications, 2023, vol. 14, issue 1, 1-13

Abstract: Abstract Core-shell bimetallic nanocatalysts have attracted long-standing attention in heterogeneous catalysis. Tailoring both the core size and shell thickness to the dedicated geometrical and electronic properties for high catalytic reactivity is important but challenging. Here, taking Au@Pd core-shell catalysts as an example, we disclose by theory that a large size of Au core with a two monolayer of Pd shell is vital to eliminate undesired lattice contractions and ligand destabilizations for optimum benzyl alcohol adsorption. A set of Au@Pd/SiO2 catalysts with various core sizes and shell thicknesses are precisely fabricated. In the benzyl alcohol oxidation reaction, we find that the activity increases monotonically with the core size but varies nonmontonically with the shell thickness, where a record-high activity is achieved on a Au@Pd catalyst with a large core size of 6.8 nm and a shell thickness of ~2–3 monolayers. These findings highlight the conjugated dual particle size effect in bimetallic catalysis.

Date: 2023
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DOI: 10.1038/s41467-023-36147-2

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