TY - JOUR
T1 - Elucidation of catalytic NOx reduction mechanism in an electric field at low temperatures
AU - Shigemoto, Ayaka
AU - Higo, Takuma
AU - Narita, Yuki
AU - Yamazoe, Seiji
AU - Uenishi, Toru
AU - Sekine, Yasushi
N1 - Publisher Copyright:
© 2022 The Royal Society of Chemistry.
PY - 2022/3/10
Y1 - 2022/3/10
N2 - As automobiles increasingly become electrically driven and as more engines and motors are used together, the exhaust temperatures of internal combustion engines are decreasing. Further improvement of exhaust gas purification catalyst performance is necessary. To purify nitrogen oxides, unburned hydrocarbons, and carbon monoxide simultaneously at low temperatures, electrothermal heating and plasma catalysis have been proposed, but these methods require high power consumption. Results of this study indicate that a direct current electric field applied to a Pd-supported catalyst shows high purification rates even at temperatures lower than 473 K under TWC conditions (NO-CO-C3H6-O2-H2O). For clarifying the reaction mechanism in this process, the adsorption of reactants was evaluated using in situ DRIFTS measurements in an electric field. Factors that improve the activity at low temperatures in the electric field were clarified.
AB - As automobiles increasingly become electrically driven and as more engines and motors are used together, the exhaust temperatures of internal combustion engines are decreasing. Further improvement of exhaust gas purification catalyst performance is necessary. To purify nitrogen oxides, unburned hydrocarbons, and carbon monoxide simultaneously at low temperatures, electrothermal heating and plasma catalysis have been proposed, but these methods require high power consumption. Results of this study indicate that a direct current electric field applied to a Pd-supported catalyst shows high purification rates even at temperatures lower than 473 K under TWC conditions (NO-CO-C3H6-O2-H2O). For clarifying the reaction mechanism in this process, the adsorption of reactants was evaluated using in situ DRIFTS measurements in an electric field. Factors that improve the activity at low temperatures in the electric field were clarified.
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U2 - 10.1039/d2cy00129b
DO - 10.1039/d2cy00129b
M3 - Article
AN - SCOPUS:85127023659
SN - 2044-4753
VL - 12
SP - 4450
EP - 4455
JO - Catalysis Science and Technology
JF - Catalysis Science and Technology
IS - 14
ER -