Efficient electrocatalytic CO₂ reduction to ethylene using cuprous oxide derivatives.

IF 3.8 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Frontiers in Chemistry Pub Date : 2024-10-14 eCollection Date: 2024-01-01 DOI:10.3389/fchem.2024.1482168

Wenfei Dong, Dewen Fu, Zhifeng Zhang, Zhiqiang Wu, Hongjian Zhao, Wangsuo Liu

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Abstract

Copper-based materials play a vital role in the electrochemical transformation of CO₂ into C₂/C₂₊ compounds. In this study, cross-sectional octahedral Cu₂O microcrystals were prepared in situ on carbon paper electrodes via electrochemical deposition. The morphology and integrity of the exposed crystal surface (111) were meticulously controlled by adjusting the deposition potential, time, and temperature. These cross-sectional octahedral Cu₂O microcrystals exhibited high electrocatalytic activity for ethylene (C₂H₄) production through CO₂ reduction. In a 0.1 M KHCO₃ electrolyte, the Faradaic efficiency for C₂H₄ reached 42.0% at a potential of -1.376 V vs. RHE. During continuous electrolysis over 10 h, the FE (C₂H₄) remained stable around 40%. During electrolysis, the fully exposed (111) crystal faces of Cu₂O microcrystals are reduced to Cu⁰, which enhances C-C coupling and could serve as the main active sites for catalyzing the conversion of CO₂ to C₂H₄.

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使用氧化亚铜衍生物高效电催化 CO2 还原成乙烯。

铜基材料在二氧化碳向 C2/C2+ 化合物的电化学转化过程中发挥着重要作用。本研究通过电化学沉积法在碳纸电极上原位制备了横截面八面体 Cu2O 微晶。通过调节沉积电位、时间和温度，对暴露的晶体表面（111）的形态和完整性进行了细致的控制。这些横截面八面体 Cu2O 微晶在通过二氧化碳还原生产乙烯（C2H4）方面表现出很高的电催化活性。在 0.1 M KHCO3 电解液中，当电位为 -1.376 V 对 RHE 时，C2H4 的法拉第效率达到 42.0%。在 10 小时的连续电解过程中，法拉第效率（C2H4）稳定在 40% 左右。在电解过程中，Cu2O 微晶完全暴露的（111）晶面被还原为 Cu0，从而增强了 C-C 耦合，可作为催化 CO2 转化为 C2H4 的主要活性位点。

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来源期刊

Frontiers in Chemistry Chemistry-General Chemistry

CiteScore

8.50

自引率

3.60%

发文量

1540

审稿时长

12 weeks

期刊介绍： Frontiers in Chemistry is a high visiblity and quality journal, publishing rigorously peer-reviewed research across the chemical sciences. Field Chief Editor Steve Suib at the University of Connecticut is supported by an outstanding Editorial Board of international researchers. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to academics, industry leaders and the public worldwide. Chemistry is a branch of science that is linked to all other main fields of research. The omnipresence of Chemistry is apparent in our everyday lives from the electronic devices that we all use to communicate, to foods we eat, to our health and well-being, to the different forms of energy that we use. While there are many subtopics and specialties of Chemistry, the fundamental link in all these areas is how atoms, ions, and molecules come together and come apart in what some have come to call the “dance of life”. All specialty sections of Frontiers in Chemistry are open-access with the goal of publishing outstanding research publications, review articles, commentaries, and ideas about various aspects of Chemistry. The past forms of publication often have specific subdisciplines, most commonly of analytical, inorganic, organic and physical chemistries, but these days those lines and boxes are quite blurry and the silos of those disciplines appear to be eroding. Chemistry is important to both fundamental and applied areas of research and manufacturing, and indeed the outlines of academic versus industrial research are also often artificial. Collaborative research across all specialty areas of Chemistry is highly encouraged and supported as we move forward. These are exciting times and the field of Chemistry is an important and significant contributor to our collective knowledge.