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Nano Research

Article Title

Concave Cu-Pd bimetallic nanocrystals: Ligand-based Co-reduction and mechanistic study

Authors

Lan Zhang, Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
Hongyang Su, Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
Mei Sun, Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
Youcheng Wang, Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
Wenlong Wu, Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
Taekyung Yu, Department of Chemical Engineering, College of Engineering, Kyung Hee University, Yongin 446-701, Republic of Korea
Jie Zeng, Hefei National Laboratory for Physical Sciences at the Microscale, Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences, Center of Advanced Nanocatalysis (CAN-USTC) & Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China

Keywords

Cu-Pd alloy, Co-reduction, concave, mechanistic study, hydrogenation of 3-nitrostyrene

Abstract

The synthesis of highly uniform alloy nanocrystals with a concave feature is desirable for applications in catalysis but is an arduous task. This article proposes an initiative protocol for the fabrication of novel Cu-Pd alloy nanocrystals, wherein the volume of decylamine (DA) in the reaction system was found to greatly influence the formation of different morphologies, including the tetrahedron (TH), concave tetrahedron (CTH), rhombohedral-tetrapod (RTP), and tetrapod (TP). The alloy structure of the products arises from the coordination interaction between the DA and metal ions, which affects the reduction potential of Cu and Pd species, and thus yields co-reduction. Other reaction parameters, such as the type of ligand, amount of reductant, and temperature, were also altered to study the growth mechanism, yielding consistent conclusions in the diffusion-controlled regime. As a catalyst, 48-nm Cu-Pd concave tetrahedral nanocrystals were highly active for the hydrogenation of 3-nitrostyrene and exhibited >99.9% chemoselectivity to C=C instead of –NO2.

Graphical Abstract

Publisher

Tsinghua University Press

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