https://doi.org/10.1016/j.apcata.2021.118300

Effect of preparation method on the performance of porous RuOx/Co3O4 catalysts for 1, 2-dichloroethane oxidation

Highlights

• •Porous Co3O4 with high yield was synthesized by calcination from plate-like Co(OH)(OCH3).

• •HP method could obtain Co3O4 supported RuOx catalyst with superior properties.

• •RuOx/Co3O4-HP showed the highest activity for 1, 2-DCE oxidation, which also presented high performance for other VOCs oxidation.

• •RuOx/Co3O4 catalysts showed highly stable activity for 1, 2-DCE oxidation and water vapor had a positive effect on 1, 2-DCE conversion.

Abstract

Porous Co3O4 with high yield was synthesized through calcination from plate-like Co(OH)(OCH3). Then, a series of Co3O4 supported RuOx catalysts were prepared using three different loading methods, including homogeneous precipitation (HP), precipitation-deposition (DP), and wet impregnation (IM). Their physicochemical properties were investigated by various characterization techniques, and their performance for catalytic oxidation of 1, 2-dichloroethane (1, 2-DCE) was also evaluated. RuOx/Co3O4-HP possessed the most outstanding low-temperature reducibility, more oxygen vacancies, and surface active oxygen, correspondingly exhibited a better catalytic activity and lower selectivity of polychlorinated by-products. Moreover, RuOx/Co3O4-HP also presented an excellent performance for other types of hydrocarbons abatement. The stability test showed that the RuOx/Co3O4-HP showed highly stable activity for 1, 2-DCE oxidation, and the beneficial effect of water was further confirmed.