Volume 136, Issue 48 e202410039
Forschungsartikel

Quantifying Interface-Performance Relationships in Electrochemical CO2 Reduction through Mixed-Dimensional Assembly of Nanocrystal-on-Nanowire Superstructures

Hushui Chen

Hushui Chen

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and iChEM, Fudan University, Shanghai, 200438 China

These authors contributed equally to this work.

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Taishi Xiao

Taishi Xiao

School of Microelectronics and State Key Laboratory of ASIC and System, Fudan University, Shanghai, 200438 China

These authors contributed equally to this work.

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Yan Xia

Yan Xia

State Key Laboratory of Molecule Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200438 China

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Hengyao Song

Hengyao Song

State Key Laboratory of Molecule Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200438 China

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Xiangyun Xi

Xiangyun Xi

State Key Laboratory of Molecule Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200438 China

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Xianwu Huang

Xianwu Huang

State Key Laboratory of Molecule Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200438 China

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Prof. Dong Yang

Prof. Dong Yang

State Key Laboratory of Molecule Engineering of Polymers and Department of Macromolecular Science, Fudan University, Shanghai, 200438 China

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Prof. Tongtao Li

Corresponding Author

Prof. Tongtao Li

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and iChEM, Fudan University, Shanghai, 200438 China

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Prof. Zhengzong Sun

Corresponding Author

Prof. Zhengzong Sun

School of Microelectronics and State Key Laboratory of ASIC and System, Fudan University, Shanghai, 200438 China

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Prof. Angang Dong

Corresponding Author

Prof. Angang Dong

Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, and iChEM, Fudan University, Shanghai, 200438 China

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First published: 28 August 2024

Abstract

Fine-tuning the interfacial sites within heterogeneous catalysts is pivotal for unravelling the intricate structure–property relationship and optimizing their catalytic performance. Herein, a simple and versatile mixed-dimensional assembly approach is proposed to create nanocrystal-on-nanowire superstructures with precisely adjustable numbers of biphasic interfaces. This method leverages an efficient self-assembly process in which colloidal nanocrystals spontaneously organize onto Ag nanowires, driven by the solvophobic effect. Importantly, varying the ratio of the two components during assembly allows for accurate control over both the quantity and contact perimeter of biphasic interfaces. As a proof-of-concept demonstration, a series of Au-on-Ag superstructures with varying numbers of Au/Ag interfaces are constructed and employed as electrocatalysts for electrochemical CO2-to-CO conversion. Experimental results reveal a logarithmic linear relationship between catalytic activity and the number of Au/Ag interfaces per unit mass of Au-on-Ag superstructures. This work presents a straightforward approach for precise interface engineering, paving the way for systematic exploration of interface-dependent catalytic behaviors in heterogeneous catalysts.

Conflict of Interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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