Unlocking lattice oxygen mobility via acid etching in Co 3 O 4 /CeZrO 2 for efficient passive NO x adsorption

Key Points

• The research aims to improve the mobility of active oxygen species in Co3O4/CeZrO2 to develop efficient passive NOx adsorbers.
• Utilized acid etching on Co3O4/CeZrO2 materials.
• Evaluated performance in NOx adsorption under cold-start conditions (<200 °C).
• Analyzed the impact on lattice oxygen mobility.
• Improved lattice oxygen mobility was achieved through acid etching.
• The modified adsorber showed enhanced NOx adsorption efficiency during cold starts.
• Findings support better adherence to stringent emission standards.

Abstract