催化作用
1,2-二氯乙烷
路易斯酸
化学
氯
选择性
分解
劈理(地质)
氧化还原
二氯乙烷
吸附
降级(电信)
氧气
光化学
无机化学
有机化学
材料科学
断裂(地质)
计算机科学
复合材料
电信
作者
Yu Huang,Mingjiao Tian,Zeyu Jiang,Mudi Ma,Changwei Chen,Han Xu,Jingjie Zhang,Reem Albilali,Chi He
标识
DOI:10.1016/j.apcatb.2021.121002
摘要
Ru-based catalysts with increased attention for CVOC purification still have huge challenges in promoting their low-temperature activity and durability. Here, a Cr-modified RuO2/TiO2 catalyst was fabricated and employed for 1,2-dichloroethane (1,2-DCE) destruction. The synergy of Cr2O3 and RuO2/TiO2 enhances the exposure of surface Ru, generating abundant reducible Cr6+ and Ru4+ species and chemically adsorbed oxygen, which promote the activity and CO2/HCl selectivity in 1,2-DCE decomposition evidently. 1,2-DCE primarily activates on the Lewis acid sites (LAS) over RuO2/Cr2O3/TiO2 with C-Cl cleavage. Meanwhile, C-C cleavage occurs along with the dehydrochlorination and chlorination reactions. The presence of Cr2O3 greatly improves the LAS concentration and redox ability of RuO2/TiO2, accelerating the deep destruction of 1,2-DCE and inhibiting the formation of CH2Cl2, C2HCl3 and CHCl3. Cr species with superior chlorine resistance elevate the durability of RuO2/Cr2O3/TiO2 under simulated conditions toward H2O, SO2, and chlorine species, making it a promising candidate for industrial CVOC catalytic degradation.
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