Abstract
A chemical sensor and an electrochemical reactor without the need for the geometry of two electrode compartments have been fabricated using high temperature-type proton and oxide ion conductors, respectively. Pd|CaZr0.9In0.1O3-α Au, responds quickly to dilute hydrocarbons (CH4, C2H6 and C3Hg) in air at 700 °C and changes an electromotive force (EMF) in proportion to the hydrocarbon content. Pd | yttria-stabilized zirconia (YSZ) | Pd, can remove both NO and CH4 in the presence of excess O2 at 700 °C. By passing the direct current through the cell, NO is reduced to N2 at the cathode, and CH4 is oxidized to COx at the anode. The efficiency of removal is independent of the presence of H2O and CO2.
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Hibino, T., Masegi, A. & Iwahara, H. Detection of hydrocarbons in air and purification of exhaust gas under lean-burn conditions using solid electrolytes. Res. Chem. Intermed. 21, 181–191 (1995). https://doi.org/10.1163/156856795X00161
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DOI: https://doi.org/10.1163/156856795X00161