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

Support-Dependent Activity and Thermal Stability of Ru-Based Catalysts for Catalytic Combustion of Light Hydrocarbons

“…Furthermore, the mean crystallite sizes of the Co )), 470 cm −1 (E g symmetry), and 510 cm −1 (F 2g symmetry). 18 After Ru was introduced, the shift of the main band assigned to Co 3 O 4 (from 675 to 655 cm −1 ) occurred, 6g,h), which were derived from a platelike Co(OH)(OCH 3 ) precursor (Figure 6e,f) prepared by the methanol solvothermal method and the decomposition of the formed organics. 18 Noteworthily, the introduction of Ce further thinned the thickness of the Co(OH)(OCH 3 ) precursor and transformed it into flower structures.…”

“…Moreover, two additional peaks at about 705 and 965 cm –1 appeared on the fresh Ru/CeO 2 and could be assigned to the asymmetric structure of Ru–O–Ce but almost disappeared on the aged Ru/CeO 2 , which stood for the reduction of Ru–O–Ce due to high-temperature sintering. The pristine Co 3 O 4 presented a series of weak bands such as the main bands at about 675 cm –1 (A 1g species in the O h spectroscopic symmetry from octahedral sites (CoO 6 )), 190 cm –1 (F 2g symmetry from tetrahedral sites (CoO 4 )), 470 cm –1 (E g symmetry), and 510 cm –1 (F 2g symmetry) . After Ru was introduced, the shift of the main band assigned to Co 3 O 4 (from 675 to 655 cm –1 ) occurred, although Raman bands corresponding to RuO x were not observed; moreover, the band assigned to CeO 2 shifted from 465 to 445 cm –1 for Ru/Ce-Co 3 O 4 .…”

“…The morphology of all catalysts was visualized via SEM techniques, and it is shown in Figure e–k. Ru/Co 3 O 4 and Ru/Ce-Co 3 O 4 catalysts presented holey engineered 2D nanosheets (Figure g,h), which were derived from a plate-like Co­(OH)­(OCH 3 ) precursor (Figure e,f) prepared by the methanol solvothermal method and the decomposition of the formed organics . Noteworthily, the introduction of Ce further thinned the thickness of the Co­(OH)­(OCH 3 ) precursor and transformed it into flower structures.…”

“…This work was considered to be attributed to the further optimization and understanding of Ru-based catalysts for catalytic combustion of LHs and also provided the choice for right catalysts for different practical applications. as the support of Ru-based catalysts were synthesized by a methanol solvothermal method and a precisely temperature-controlled rapid precipitation method as reported in our previous work, 17,18 respectively. Si-, Ce-, La-, Sn-, Fe-, Cu-, Mn-, or Zr-doped Co 3 O 4 nanosheets were prepared by the same procedure with the addition of tetraethyl orthosilicate, cerium acetate, lanthanum acetate, stannous acetate, iron acetate, copper acetate, manganese acetate, or zirconium acetate.…”

Engineering Ru/MnCo3Ox for 1,2-Dichloroethane Benign Destruction by Strengthening C–Cl Cleavage and Chlorine Desorption: Decisive Role of H2O and Reaction Mechanism

“…20 It has been substantiated experimentally that Co 3 O 4 -supported RuO x could help the generation of Ru−O− Co-like bonds, which in turn increases the amount of surface oxygen species due to the replacement of Co 3+ by Ru 4+ and hence displayed a superior catalytic activity and selectivity for 1,2-DCE destruction. 24,25 Additionally, MnO x could also promote the transfer of molecular oxygen to Ru species and strengthen the interaction between RuO 2 and MnO x oxides, which are key factors in VOC oxidation. 26 Consequently, as inferred from above, Ru−Mn−Co catalysts might be a more competitive candidate for CVOC destruction.…”