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CeO₂对RuO₂/γ-Al₂O₃催化剂湿式氧化降解苯酚性能的影响

Influence of CeO₂ on the Activity of RuO₂/γ-Al₂O₃ Catalyst with Wet Air Oxidation of Phenol

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【Author】 YANG Shao-xia~1,FENG Yu-jie~1,CAI Wei-min~(1,2),SUN Xiao-jun~3,WAN Jia-feng~1 (1 School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150001,China; 2 School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030,China; 3 School of Chemistry and Environmental Engineering, Harbin University of Science and Technology,Harbin 150080,China)

【机构】哈尔滨工业大学市政环境学院；哈尔滨理工大学环境化学与工程学院；哈尔滨工业大学市政环境学院哈尔滨150001；哈尔滨150001；哈尔滨150001上海交通大学环境科学与工程学院；上海200030；哈尔滨150080；哈尔滨150001；

【摘要】采用浸渍法制备了 Ru O2 /γ- Al2 O3和 Ru O2 / Ce O2 /γ- Al2 O3催化剂 ,并利用 XRD、 SEM和 XPS对催化剂进行了表征 ,研究了 Ce的加入对 Ru O2 /γ- Al2 O3催化剂表面分散性和催化剂表面元素 Ru,O和 Ce化学态的影响 ,同时考察了 Ru O2 /γ- Al2 O3和 Ru O2 / Ce O2 /γ- Al2 O3催化剂湿式氧化降解苯酚的活性 ,并深入探讨了 Ce对 Ru O2 /γ- Al2 O3催化剂的助催化作用。结果表明 :Ce掺杂改性后 ,使催化剂表面 Ru的化学态降低、表面氧空位增加 ,并且活性组分Ru的分散性增加 ,从而使 Ru O2 / Ce O2 /γ- Al2 O3催化剂的活性提高 ,因此 Ce起到了显著的助催化作用更多还原

【Abstract】 RuO₂/γ-Al₂O₃ and RuO₂/CeO₂/γ-Al₂O₃ catalysts were prepared by impregnation of γ-Al₂O₃ with RuCl₃ and Ce（NO₃）₃.The catalysts were characterized by XRD, SEM and XPS.It was studied that adding Ce influenced of the chemical state of Ru, O and Ce on the surface of the catalysts.Catalytic wet air oxidation of phenol was investigated over RuO₂/γ-Al₂O₃ and RuO₂/CeO₂/γ-Al₂O₃ catalysts and the Ce-promoted catalyst was very active.Moreover the reason that Ce promoted the activity of RuO₂/γ-Al₂O₃ catalyst was stndied.The results show that the decrease of the chemical state of Ru,the increase in the surface contents of oxygen vacancies and the better dispersion of RuO₂ are responsible methods for the better activity of RuO₂/CeO₂/γ-Al₂O₃ catalyst.更多还原