Copper modification of pyrite for CO2 electrochemical reduction

被引：0

作者：

Yang Y.-C. ^{[1
,2
]}

Yang Y.-J. ^{[2
]}

Liu J. ^{[2
]}

Xiong B. ^{[2
]}

机构：

[1] China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan

[2] State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan

来源：

Ranliao Huaxue Xuebao/Journal of Fuel Chemistry and Technology | 2022年 / 50卷 / 09期

关键词：

carbon dioxide; catalyst; electrocatalytic reduction; pyrite;

D O I：

10.19906/j.cnki.JFCT.2022025

中图分类号：

学科分类号：

摘要：

CO2 electrocatalytic reduction to synthesize highly value-added fuels provides a sustainable path for CO2 conversion and utilization. Nevertheless, the development of electrocatalysts with high catalytic activity and product selectivity remains a major challenge. In this work, copper-doped FeS2 catalysts (CuxFe1−xS2) were prepared for CO2 electrochemical reduction. The physicochemical properties of the catalysts were studied by XRD, XPS, SEM and other characterization analysis methods. Experimental results show that Cu doping can control the size of the catalyst nanosheets and inhibit the oxidation of FeS2 in the air. Cu0.33Fe0.67S2 shows better catalytic activity for CO2 electrocatalytic reduction than FeS2. In the potential range of (−1.5) − (−1.6) V vs. RHE, the total efficiency of carbon-containing products of CO2 electrocatalytic reduction is 50.8% and its current density is 23.8 mA/cm2, which increases by 71.2% compared with FeS2 catalyst. The Faradaic efficiency of Cu0.09Fe0.91S2 to produce C3H6 at −1.3 V vs. RHE is 21.8%, which is significantly higher than the value reported in the current literature. Thus, CuxFe1−xS2 is regarded as an excellent electrocatalyst for CO2 reduction. © 2022 Science Press. All rights reserved.

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页码：1167 / 1174

页数：7

共 25 条

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