催化作用
臭氧
双金属片
分解
氧化物
氧气
吸附
无机化学
化学
铜
反应性(心理学)
氧化铜
材料科学
化学工程
物理化学
有机化学
工程类
医学
生物化学
替代医学
病理
作者
Yuna Song,Min Jae Shin,Byung Chan Kwon,Jungseob So,Young Jin Kim,Alison R. Yung,No-Kuk Park,Minkyu Kim
摘要
To tackle the challenge of ground-level ozone pollution, this study proposed a potential catalytic design approach for ozone decomposition using Cu–Mn bimetallic oxide. This approach is grounded in an understanding of the intrinsic reactivity for catalyst and incorporates a novel potassium-driven low-temperature oxidation process for catalyst synthesis. The research highlights the creation of a highly reactive Cu–Mn oxide phase with extensive defect coverage, leading to significantly increased reaction rates. It also identifies the MnO2(100) facet as a crucial active phase, where oxygen vacancies simultaneously enhance O3 adsorption and decomposition, albeit with a concurrent risk of O2 poisoning due to the stabilization of adsorbed O2. Crucially, the incorporation of Cu offsets the effects of oxygen vacancies, influencing conversion rates and lessening O2 poisoning. The synergistic interplay between Cu and oxygen vacancies elevates the performance of the defect-rich Cu–Mn oxide catalyst. By combining computational and experimental methods, this study not only advances the understanding of the Cu–Mn oxide system for ozone decomposition but also contributes valuable insights into developing more efficient catalysts to mitigate ozone pollution.
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