Beschreibung:
<jats:title>Abstract</jats:title><jats:p>Temporal analysis of products (TAP) was used to study NO reduction to N<jats:sub>2</jats:sub> over H<jats:sub>2</jats:sub> and C<jats:sub>3</jats:sub>H<jats:sub>6</jats:sub>‐reduced La‐Zr doped ceria at 560 °C. (La‐Zr doped) ceria is found to be capable of fuel oxidation and NO reduction. NO dissociates on oxygen anion defects, thereby refilling these vacancies with oxygen anions and forming N<jats:sub>2</jats:sub>. The carbonaceous deposits, in case the catalyst was reduced by C<jats:sub>3</jats:sub>H<jats:sub>6</jats:sub>, are oxidized by oxygen species originating from lattice oxygen. This recreates oxygen anion defects, which enables substantial additional NO reduction. These findings may open a new perspective on the understanding of DeNO<jats:sub><jats:italic>x</jats:italic></jats:sub> by hydrocarbons.</jats:p>