DOI: 10.1016/j.jcou.2018.05.029
Scopus记录号: 2-s2.0-85048097388
论文题名: Electrochemical CO2 reduction to formate on Tin cathode: Influence of anode materials
作者: Jiang H. ; Zhao Y. ; Wang L. ; Kong Y. ; Li F. ; Li P.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 26 起始页码: 408
结束页码: 414
语种: 英语
英文关键词: Anode materials
; Cost-effective strategy
; Electrochemical CO2 reduction
; Formate
; Tin cathode
Scopus关键词: Anodes
; Carbon dioxide
; Cathodes
; Cost effectiveness
; Cost reduction
; Cyclic voltammetry
; Electrochemical impedance spectroscopy
; Energy efficiency
; Iridium compounds
; Lead oxide
; Oxygen
; Platinum compounds
; Reduction
; Scanning electron microscopy
; Sodium sulfate
; Tantalum oxides
; Tin
; Anode material
; CO2 reduction
; Cost effective strategies
; Electrochemical measurements
; Electrochemical test
; Formate
; Oxygen evolution activity
; Water decomposition
; Platinum
英文摘要: In this work, electrochemical CO2 reduction to formate on Tin cathode coupled with Pt, IrO2-Ta2O5/Ti and β-PbO2/Ti anodes was investigated by electrochemical tests and lab-scale experiments. The scanning electron microscopy (SEM) and X-ray diffraction (XRD) patterns of the prepared anodes demonstrate the layers doped on Ti plates exist in tetragonal phase of IrO2 and β-PbO2 crystals with dendritic and pyramid shapes, respectively, benefiting to increasing anode area in water electrolysis. The electrochemical measurements including cyclic voltammetry (CV), polarization curve and electrochemical impedance spectroscopy (EIS) performed in Na2SO4 solution indicate the IrO2-Ta2O5/Ti anode possesses higher oxygen evolution activity compared with those of Pt and β-PbO2/Ti ones; this is because of its excellent abilities in enlarging electrode area, decreasing oxygen evolution potential (OEP) and increasing oxidation kinetics for water decomposition, which effectively enhances the CO2 reduction. The faradic and energy efficiencies of IrO2-Ta2O5/Ti anode are 40.2% and 27.4%, raising by ratios of 7.2%, 81.1% and 12.8%, 242.5% to those of Pt and β-PbO2/Ti, respectively, at applied current of 0.3 A and reaction time of 24 h during formate production. Moreover, the power consumption lowered to 13.0 kW h/kg formate on IrO2-Ta2O5/Ti anode was achieved and it is much less than those on other two anodes, offsetting about 53.8% of the input energy if prices of the formate and electricity are overall taken into account. Therefore, anode materials highly affect the reductive kinetics and employment of anodes with lower OEP is a cost-effective strategy for electrochemical CO2 reduction. © 2018 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111874
Appears in Collections: 气候减缓与适应
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作者单位: School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, China; School of Chemical Engineering and Technology, China University of Mining and Technology, No. 1, Daxue Road, Quanshan District, Xuzhou City, Jiangsu Province, 221116, China; School of Water Resource and Environmental Engineering, East China Institute of Technology, Nanchang, Jiangxi, 330013, China
Recommended Citation:
Jiang H.,Zhao Y.,Wang L.,et al. Electrochemical CO2 reduction to formate on Tin cathode: Influence of anode materials[J]. Journal of CO2 Utilization,2018-01-01,26