甲苯
催化作用
兴奋剂
纳米颗粒
材料科学
Boosting(机器学习)
氧气
金属
空位缺陷
化学工程
无机化学
化学
纳米技术
冶金
有机化学
结晶学
计算机科学
光电子学
机器学习
工程类
作者
Yan Xia,Yuanyuan Yang,Mingli Li,Zhangzhang Lan,Ying‐Hao Chu,Ganxue Wu,Dexin Fang,Z. Zeng,Hu Xiao,Shihuai Deng,Yaoqiang Chen
标识
DOI:10.1016/j.seppur.2024.126993
摘要
Achievement of catalytic oxidation of volatile organic compounds (VOCs) at low temperature is still a challenge to be addressed. Promoting catalytic activity via constructing oxygen vacancy defect is an attractive strategy in heterogeneous catalysis. Herein, a series of Ce2Co1M1 (M = Cu, Mn, Zr) catalysts were prepared by modified co-precipitation method and their catalytic oxidation performance of toluene was measured. Activity results suggested that the introduction of doping-metals significantly enhanced the catalytic performance of Ce2Co1Ox, with Ce2Co1Cu1 possessed the optimal catalytic activity (T90 = 210 ℃), robust stability, water resistance, GHSV tolerance and anti-aging ability. It has been demonstrated that Cu-doping resulted in the formation of Cu-Ce solid solution and constructed a Cu2+-O-Ce4+ complex active site. Benefiting from this, the redox and gaseous oxygen molecule capture & activation capabilities of the catalyst are tremendously improved via constructing abundant oxygen vacancies. The in-situ DRIFTS results revealed that Ce2Co1Cu1 exhibited a better C=C breaking of aromatic rings ability, a faster consumption rate of benzoate and maleic anhydride, and is less prone to accumulation of by-products, the above account for its enhanced low-temperature catalytic performance for toluene. This work may provide a new strategy to design the high-efficiency toluene oxidation catalysts.
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