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Published February 15, 2022 | Supplemental Material
Journal Article Open

ZnSn nanocatalyst: Ultra-high formate selectivity from CO₂ electrochemical reduction and the structure evolution effect

Abstract

The introduction of tin (Sn) into Zn-based catalyst can change its intrinsic properties of the electrochemically reduction of CO₂ to CO, obtaining a high formate yield. The electron transfer from Zn to Sn lowers down the d-band center of Sn, leading to a more reliable surface adsorption of the *OCHO intermediate and high formate selectivity. The obtained ZnSn catalyst enables formate formation with a drastically boosted Faradaic efficiency (FE) up to 94%, which is 2.04 and 1.34 times of pure Zn and Sn foils, respectively, indicating a synergistic effect between Zn and Sn. During the electrochemical CO₂ reduction reaction (eCO₂RR) process, the morphology of the ZnSn catalyst evolved from nanoparticles to nanosheets, nanoneedles and collapsed structures, corresponding to the activation, stabilization and decay stages, respectively. This study provides a facile and controllable approach for the construction of novel bimetallic catalyst favoring formate selectivity based on the synergistic effect.

Additional Information

© 2021 Elsevier. Received 24 August 2021, Revised 30 October 2021, Accepted 1 November 2021, Available online 3 November 2021. We gratefully acknowledge the financial support by National Natural Science Foundation of China (22002087), Shanghai Sailing Program (18YF1408600) and Baoshan Iron & Steel Co., Ltd. (Baosteel), located in Shanghai, China. CRediT authorship contribution statement: Wenjuan Li: Writing – original draft. Zhengrong Zhang: Software. Wenhui Liu: Investigation. Quan Gan: Writing – review & editing, Resources. Minmin Liu: Data curation, Writing – review & editing. Shengjuan Huo: Methodology, Project administration, Resources , Writing – review & editing. Wei Chen: Writing – review & editing. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Created:
August 22, 2023
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October 23, 2023