Shi Huangang, Chu Guowei, Tan Wenyi, Su Chao
School of Environmental Engineering, Nanjing Institute of Technology, Nanjing, China.
WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University, Perth, WA, Australia.
Front Chem. 2020 Jan 23;7:947. doi: 10.3389/fchem.2019.00947. eCollection 2019.
The emission of nitric oxide from the combustion process of fossil fuels causes air pollution problems. In addition to traditional removal methods, nitric oxide can be removed by the electrochemical reduction method. In this study, BaSrCoFeO powders were synthesized using a solid-state reaction method. Symmetrical cells, with SmCeO as the electrolyte and BaSrCoFeO as the electrodes, were prepared as the electrochemical reactor for nitric oxide reduction. In the process of electrochemical reduction, nitric oxide reduction occurs at the cathode and oxygen evolution occurs at the anode. To study the nitric oxide reduction performance of the electrode, impedances of the symmetrical cell in different atmospheres were analyzed. For the nitric oxide conversion in symmetric cells, two different modes, dual chamber and single chamber, were applied. Results demonstrated that the denitrification performance of the double chamber was better but the single chamber mode had other advantages in its simple structure. Presliminary stability results of the single chamber symmetric cell show that the electrochemical reduction of nitric oxide in symmetric cells with BSCF performed most reliably.
化石燃料燃烧过程中一氧化氮的排放会引发空气污染问题。除了传统的去除方法外，一氧化氮还可以通过电化学还原法去除。在本研究中，采用固态反应法合成了BaSrCoFeO粉末。以SmCeO为电解质、BaSrCoFeO为电极制备了对称电池，作为一氧化氮还原的电化学反应器。在电化学还原过程中，一氧化氮在阴极发生还原反应，氧气在阳极析出。为了研究电极的一氧化氮还原性能，分析了对称电池在不同气氛下的阻抗。对于对称电池中的一氧化氮转化，应用了两种不同模式，即双室模式和单室模式。结果表明，双室模式的脱硝性能更好，但单室模式结构简单，具有其他优点。单室对称电池的初步稳定性结果表明，具有BSCF的对称电池中一氧化氮的电化学还原最为可靠。
