Ground-level ozone pollution is a major concern for human health, ecosystems, and material degradation. This article presents a Co- and Fe-based bimetallic layered double hydroxide (CoFe-LDH) catalyst for ozone decomposition. The CoFe-LDH catalyst exhibited 100% ozone decomposition efficiency over 24 h at a reaction rate of 35.3 μmol g⁻¹ min⁻¹. The synergetic effects between Co and Fe regulated the valence state, increased the number of Co vacancies, and increased the specific surface area and density of the hydroxyl groups on the surface. Moreover, the two metals facilitated different dissociation steps and the desorption step became exothermic after ozone enrichment on the surface, rendering every step concurrently spontaneous, which has not been observed in previously reported ozone decomposition catalysts. This study demonstrates the potential of LDHs for ozone pollution control and offers new insights into the design of synergistic bimetallic catalysts.

中文翻译：

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Co 和 Fe 的双金属协同作用对臭氧的高效催化分解


地面臭氧污染是人类健康、生态系统和材料降解的主要问题。本文介绍了一种用于臭氧分解的 Co 和 Fe 基双金属层状双氢氧化物 （CoFe-LDH） 催化剂。CoFe-LDH 催化剂在 24 小时内以 35.3 μmol ^{g-1 min-1} 的反应速率表现出 100% 的臭氧分解效率。Co 和 Fe 之间的协同效应调节了价态，增加了 Co 空位的数量，增加了表面羟基的比表面积和密度。此外，这两种金属促进了不同的解离步骤，并且在表面富含臭氧后，解吸步骤变得放热，使每个步骤同时自发，这在以前报道的臭氧分解催化剂中未观察到。本研究证明了 LDHs 在臭氧污染控制方面的潜力，并为协同双金属催化剂的设计提供了新的见解。