活动站点
催化作用
铱
金属
再分配(选举)
分解
材料科学
光化学
Atom(片上系统)
化学
无机化学
有机化学
嵌入式系统
法学
政治学
政治
计算机科学
作者
Zhiwei Wang,Lu Peng,Ping Zhu,Wenlong Wang,Cheng Yang,Hong-Ying Hu,Qian-Yuan Wu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2024-01-18
标识
DOI:10.1021/acsnano.3c07223
摘要
Developing efficient heterogeneous H2O2 decomposition catalysts under neutral conditions is of great importance in many fields such as clinical therapy, sewage treatment, and semiconductor manufacturing but still suffers from low intrinsic activity and ambiguous mechanism understanding. Herein, we constructed activated carbon supported with an Ir–Fe dual-metal-atom active sites catalyst (IrFe-AC) by using a facile method based on a pulsed laser. The electron redistribution in Ir–Fe dual-metal-atom active sites leads to the formation of double reductive metal active sites, which can strengthen the metal–H2O2 interaction and boost the H2O2 decomposition performance of Ir–Fe dual-metal-atom active sites. Ir–Fe dual-metal-atom active sites show a high second-order reaction rate constant of 3.53 × 106 M–1·min–1, which is ∼106 times higher than that of Fe3O4. IrFe-AC is effective in removing excess intracellular reactive oxygen species, protecting DNA, and reducing inflammation under oxidative stress, indicating its therapeutic potential against oxidative stress-related diseases. This study could advance the mechanism understanding of H2O2 decomposition by heterogeneous catalysts and provide guidance for the rational design of high-performance catalysts for H2O2 decomposition.
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