Elucidation of catalytic NO_x reduction mechanism in an electric field at low temperatures

Abstract

We found that Pd-supported catalysts exhibit high TWC activity when a DC electric field is applied, even at temperatures lower than 473 K, and the reaction mechanism has been investigated.

Electrification-Enhanced Low-Temperature NOx Storage–Reduction on Pt and K Co-Supported Antimony-Doped Tin Oxides

“…However, the degree of slip upon electrification is 58% less than that during heating, supporting the hypothesis that the reactivity of C 3 H 6 is improved by electricity. Similarly, Sekine’s groups , also reported the promotion of the applied electric field to C 3 H 6 activation through partial oxidization by surface lattice oxygen into oxygenated species for feasible NO reduction.…”

Electric field-assisted NSR process for lean NOx reduction at low temperatures

“…We have already established a purification technique that allows very high NO conversion and N 2 selectivity, even at low temperatures, by the combination of catalyst and electric field. 16,17 In this study, a novel NSR process using a Pt–BaO/CeO 2 catalyst was shown to convert accumulated NO x to N 2 efficiently, even at low temperatures of 423 K and under lean burn conditions.…”