Electrochemical Performance of Ba0.5Sr0.5Co0.8Fe0.2O3−δ in Symmetric Cells With Sm0.2Ce0.8O1.9 Electrolyte for Nitric Oxide Reduction Reaction

Abstract

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, Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ powders were synthesized using a solid-state reaction method. Symmetrical cells, with Sm 0.2 Ce 0.8 O 1.9 as the electrolyte and Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3−δ 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.

Fundamental Understanding and Application of Ba0.5Sr0.5Co0.8Fe0.2O3−δPerovskite in Energy Storage and Conversion: Past, Present, and Future

“…Extending to New Energy and Environmental Applications and Beyond. Thanks to the fascinating properties such as variable transition metal states with redox activity, a large amount of oxygen vacancies as well as labile lattice oxygen, and the presence of alkaline-earth metals, BSCF has also been applied to a range of other energy and environmental applications, including ceramic membrane reactor materials for hydrocarbon conversion, 20,221 electrode materials for nitric oxide reduction reaction, 222 electrode materials in pseudocapacitors, 223,224 catalytic promoters in lithium−sulfur batteries, 225 heterogeneous catalysis in environmental remediation, 226 and optical sensors for carbon dioxide detection. 227 However, the study of BSCF in these applications is still in its infancy and requires more efforts in the long run.…”

Progress and potential for symmetrical solid oxide electrolysis cells

“…In the electrochemical reduction process, NOx is reduced at the cathode and O2 is evolved at the anode. [157] In order to investigate the NOx reduction performance of the electrode, the impedance of the symmetric cell in different atmospheres was analyzed. In a symmetrical cell, two different conversion modes are used: dual-chamber and single-chamber.…”