标题：Capture and electrochemical conversion of CO₂to value-added carbon and oxygen by molten salt electrolysis作者：Yin, Huayi; Mao, Xuhui; Tang, Diyong; Xiao, Wei; Xing, Luru; Zhu, Hua;Wang, Dihua; Sadoway, Donald R.

来源出版物：ENERGY & ENVIRONMENTAL SCIENCE 卷：6 期：5 页：1538-1545 DOI：10.1039/c3ee24132g 出版年：MAY 2013

摘要：A molten salt electrochemical system comprising a eutectic mixture of Li-Na-K carbonates, a Ni cathode, and a SnO2 inert anode is proposed for the capture and electrochemical conversion of CO2. It is demonstrated that CO2 can be effectively captured by molten carbonates, and subsequently electrochemically split into amorphous carbon on the cathode, and oxygen gas at the anode. The carbon materials generated at the cathode exhibit high BET surface areas of more than 400 m(2) g(-1) and as such, represent value-added products for a variety of applications such as energy storage and pollutant adsorption. In the carbonate eutectic (500 degrees C), the presence of Li2CO3 is shown to be required for the deposition of carbon from the melt, wherein O-2(-) or Li2O serves as the intermediate for CO2 capture and electrochemical conversion. SnO2 proved to be an effective anode for the electrochemical evolution of oxygen. Electrochemical reactions were found to proceed at relatively high current efficiencies, even though the current densities exceed 50 mA cm(-2). The intrinsic nature of alkaline oxides for CO2 capture, the conversion of CO2 to value-added products, and the ability to drive the process with renewable energy sources such as solar power, enables the technology to be engineered for high flux capture and utilization of CO2.

入藏号：WOS:000317984700018

文献类型：Article

语种：English

扩展关键词：PHOENIX LANDING SITE; HEXAVALENT CHROMIUM; ALKALI CARBONATES; DIOXIDE; REDUCTION; CATALYSIS; COPPER; WATER; ACID; MARS

通讯作者地址：Yin, Huayi; Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

电子邮件地址：wangdh@whu.edu.cn; dsadoway@mit.edu

地址：

[Yin, Huayi;Mao, Xuhui; Tang, Diyong; Xiao, Wei; Xing, Luru; Zhu, Hua; Wang, Dihua] WuhanUniv, Sch Resource & Environm Sci,Wuhan430072, Peoples RChina.

[Sadoway, Donald R.] MIT, Dept Mat Sci & Engn,Cambridge,MA02139USA.

研究方向：Chemistry; Energy & Fuels; Engineering; Environmental Sciences & Ecology

ISSN：1754-5692

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