Low-temperature catalytic oxidation of vinyl chloride over Ru modified Co3O4 catalysts. Issue 101 (19th October 2016)

• Record Type: Journal Article
• Authors: Wang, Chao; Zhang, Chuanhui; Hua, Wenchao; Guo, Yanglong; Lu, Guanzhong; Gil, Sonia; Giroir-Fendler, Anne
• Is Part Of: RSC advances. Volume 6:Issue 101(2016)
• Page Start: 99577
• Page End: 99585
• Publication Date: 2016-10-19
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra18503g
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : 1% Ru/Co3 O4 presented the best catalytic activity and stability for vinyl chloride oxidation with low amount by-products. Abstract : Ruthenium modified cobalt oxides were prepared by (1) impregnating ruthenium chloride hydrate on cobalt oxides, Ru-supported catalysts (Ru/Co3 O4 ), and (2) Ru-doped catalysts (Ru–Co3 O4 ) where the ruthenium ions were added to the precursor solution, by a one-step sol–gel method with cobalt nitrate. The physicochemical properties of the catalysts were characterized by ICP, BET, XRD, HR-TEM, TPR, and XPS analysis. The effects of ruthenium were studied for the total oxidation of vinyl chloride. This Ru modifier was observed to enhance oxygenate formation. The different preparation methods made contributions to the different amounts of Ru 4+ on the surfaces of the catalysts while Ru 4+ would be in synergy with Co 2+ concentration, and this also changed the chemical coordination of oxygen on the surface. Dispersion of Ru oxides on the cobalt oxides surface could not only improve the catalytic activity and stability on steam, but also decrease the amount of chlorinated by-products and increase HCl selectivity.