Dalian Chemical Research Institute published high-temperature carbon dioxide electrolysis progress report
Recently, Wang Guoxiong, a researcher at the State Key Laboratory of Catalysis Basics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, and Bao Xinhe, a member of the Chinese Academy of Sciences, were invited to publish the titled "Development of High Temperature Carbon Dioxide Electrolysis in Solid Oxide Electrolysis Cells" in Advanced Materials , Challenges and Outlook "progress report.
The solid oxide electrolysis cell (SOEC) converts CO2 and H2O into syngas and hydrocarbon fuel to produce high-purity O2. It has an all-solid and modular structure, and has the advantages of fast reaction rate, high energy efficiency and low cost. CO2 conversion and renewable clean electric energy storage show great potential application prospects. This progress report introduces the development process of SOEC, CO2 electrolysis mechanism, SOEC electrode and electrolyte materials, discusses the influence of electrode composition and microstructure on CO2 electrolysis performance; summarizes the attenuation mechanism of SOEC, and fuel-assisted SOEC and high-pressure SOEC Development status; prospects the use of in-situ dynamic characterization technology to study the electrode reaction mechanism, provide guidance for the development of high-performance electrode materials, and at the same time realize the efficient production of fuels and chemicals by SOEC through anode-coupled alkane conversion.
Wang Guoxiong and Bao Xinhe ’s team recently committed to high-temperature CO2 electrolysis research: a series of metal-oxide interface structures were constructed by impregnation and in-situ reduction, and a large number of oxygen vacancies were formed, which effectively enhanced the adsorption and activation of cathode CO2 at high temperatures. The anode oxygen precipitation reaction significantly improves the CO2 electrolysis performance; combined with electrochemical AC impedance spectroscopy, electrochemical in situ near atmospheric pressure XPS and theoretical calculations, it is revealed that at the SOEC cathode, the interface structure mainly promotes the adsorption and dissociation of CO2. At the SOEC anode The interface structure promotes the overflow of oxygen species from the oxide to the metal surface. Related research results were published in Angew. Chem. Int. Ed., 2019; Nano Energy, 2018; Energy Storage Mater., 2018; J. Mater. Chem. A, 2018; J. Mater. Chem. A, 2019, etc.
The above-mentioned research work was supported by projects such as the National Natural Science Foundation of China, the National Key R & D Program and the Strategic Pilot Technology Special Project of the Chinese Academy of Sciences.
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