锌基层状双氢氧化物电化学还原CO2：结构三价金属离子的作用

IF 2.9 Q1 MATERIALS SCIENCE, CERAMICS

Open Ceramics Pub Date : 2025-04-25 DOI:10.1016/j.oceram.2025.100788

Ryosuke Nakazato , Keeko Matsumoto , Matthias Quintelier , Joke Hadermann , Nataly Carolina Rosero-Navarro , Akira Miura , Kiyoharu Tadanaga

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引用次数: 0

摘要

二氧化碳电化学还原（CO2ER）作为一种利用可再生能源将二氧化碳回收为化工原料的技术受到了广泛关注。锌基层状双氢氧化物（LDH）是一种对一氧化碳（CO）具有良好选择性的非贵金属催化剂，是近年来发现的一种很有前途的CO2ER催化剂。然而，锌-M3+ LDHs中结构三价金属离子（M3+）对CO2ER性能的作用尚未揭示。本研究采用易共沉淀法合成了Zn-Cr、Zn-Ga和Zn-Al三种LDHs，并对其CO2ER性能和电化学性能进行了评价。研究发现，Zn-Al LDH、Zn-Cr和Zn-Ga LDH均表现出CO演化的CO2ER活性，电化学阻抗谱分析表明，zn基LDH中M3+的类型影响其电子和离子电导率，是影响其CO2ER性能的关键因素。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

CO2 electrochemical reduction by Zn-based layered double hydroxides: The role of structural trivalent metal ions

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CO2 electrochemical reduction by Zn-based layered double hydroxides: The role of structural trivalent metal ions

Carbon dioxide electrochemical reduction (CO₂ER) has attracted considerable attention as a technology to recycle CO₂ into raw materials for chemicals using renewable energies. Zn-based layered double hydroxide (LDH) was recently found to be a promising CO₂ER catalyst, which is a non-precious metal catalyst with excellent selectivity for carbon monoxide (CO). However, the role of structural trivalent metal ions (M³⁺) contained in Zn-M³⁺ LDHs for the CO₂ER performance was not revealed. In this study, Zn-Cr, Zn-Ga LDHs, and Zn-Al LDHs were synthesized using a facile coprecipitation process, and their CO₂ER performance and electrochemical properties were evaluated. We found that not only Zn-Al LDH but also Zn-Cr and Zn-Ga LDHs showed CO₂ER activity for CO evolution, and the analysis by electrochemical impedance spectroscopy revealed that the type of M³⁺ in Zn-based LDHs affected their electronic and ionic conductivity, functioning as key roles for their CO₂ER performance.

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