Oxidative decomposition of chlorobenzene on MnaVOX catalysts: The critical roles of oxygen vacancies and hollow structure

APPLIED SURFACE SCIENCE(2023)

引用 4|浏览11
暂无评分
摘要
It is urgent to build a catalyst with high activity and stability to remove chlorinated volatile organic compounds (CVOCs) efficiently due to their strong toxicity. Here, three-dimensional (3D) petal spherical with hierarchical hollow porous structures were synthesized by a facile wet-chemical self-assembly and a low-temperature calcination strategy. Benefiting from the oxygen vacancy defects varies and 3D structures under a certain amount of Mn content, thereby the as-obtained MnaVOX catalysts could regulate the number of active sites and the final catalytic performance. As expected, it shows that the conversion temperature (T90) of oxidation of chlorobenzene (CB) with the optimized free-standing catalyst (Mn1.2VOX) is 229 degrees C, with low activity energy (30.5 KJ/mol). Moreover, the degradation efficiency of the catalyst for CB remained above 99% after continuous testing at 300 degrees C for 60 h. This work provides a new strategy for exploring a substitute advanced catalysts for noble metals with controllable vacancy defects and desired nano/micro structures to facilitate the catalytic oxidation reaction in CVOCs.
更多
查看译文
关键词
Hollow structures,Abundant oxygen vacancies,Chlorobenzene oxidation catalysis,Reactive oxygen species
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要