Surface Ni–O–Co sites in cube-shaped Ni–Co3O4 spinel oxides for boosting soot oxidation

Abstract

Catalytic soot oxidation in automotive exhaust using non-noble metal catalysts remains an urgent challenge. Herein, the formation of surface Ni–O–Co sites via Ni solution quenching enhances the redox properties of Co-based spinel oxides, which is a strategy to promote the adsorption–activation capacity of O₂ and NO, boosting NO_x-assisted soot oxidation.