Fabrication of a multi-dimensional CoFeOx catalyst for the efficient catalytic oxidation elimination of o-dichlorobenzene

Abstract

In this study, we constructed multi-dimensional CoFeO_x catalysts for the catalytic oxidation elimination of o-dichlorobenzene (o-DCB). The dimension of the catalyst was modulated to promote the dispersion of components and thus improve the surface active oxygen species. The effects of the multi-dimensional CoFeO_x catalysts on surface active oxygen species and the o-DCB elimination performance were investigated. The temperatures of o-DCB catalytic oxidation with 90% conversion (T₉₀) over the 2D/1D CoO_x/CoFeO_x, 2D CoFeO_x and 2D/1D CoFeO_x/CoO_x catalysts were 395, 405, and 365 °C, respectively. The results showed that the oxygen vacancies of the 2D/1D CoFeO_x/CoO_x catalysts were enhanced due to the multi-dimensional effect compared to 2D CoFeO_x. The outstanding catalytic activity and thermal stability of 2D/1D CoFeO_x/CoO_x were mainly attributed to its large specific surface area, pore volume and pore size, more Co³⁺ content, excellent reducibility, large number of surface adsorbed oxygen (O_sur) species and rich oxygen vacancies.