Considering the large amount of carbon monoxide produced by human activities causing serious problems to the environment, it can be seen that the low-temperature catalytic combustion of CO is a desirable route for CO removal. Herein, we reported an efficient and stable copper–manganese catalyst (CuMnO_x-MR) based on a mechanochemical redox process. Interestingly, more oxygen vacancies and lattice defects emerged in CuMnO_x-MR due to the molecular-scale redox reaction between Cu⁺ and MnO₄⁻. Meanwhile, the mechanochemical redox process was completed by solvent-free and rapid (1 h) ball milling. Moreover, the ball milling could continually break CuMnO_x-MR particles to generate a high degree of interstitial porosity (up to 59 m² g⁻¹). Compared with the control samples, CuMnO_x-MR exhibited a lower catalytic temperature (T₉₀ = 140 °C) in the CO oxidation reaction and performed well in the stability test (150 °C, 100 h). Finally, the CuMnO_x-MR showed good resistance to H₂O (4.2 vol% moisture, 100 h) and SO₂ (100 ppm), which suggests its potential for practical applications.

中文翻译：

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基于机械化学氧化还原工艺轻松合成CuMnOx催化剂，可实现高效，稳定的CO氧化

考虑到人类活动产生的大量一氧化碳对环境造成严重问题，可以看出，CO的低温催化燃烧是去除CO的理想途径。在本文中，我们报告了基于机械化学氧化还原工艺的高效稳定的铜锰催化剂（CuMnO _x -MR）。有趣的是，更多的氧空位和晶格缺陷出现CuMnO _X -MR由于Cu的分子级氧化还原反应⁺和MnO ₄ ^- 。同时，通过无溶剂快速球磨（1 h）完成了机械化学氧化还原过程。此外，球磨可能会不断破坏CuMnO _x-MR颗粒产生很高的间隙孔隙率（最大59 m ² g ^-1）。与对照样品相比，CuMnO _x -MR在CO氧化反应中表现出较低的催化温度（T ₉₀ = 140°C），并且在稳定性测试中表现良好（150°C，100 h）。最后，CuMnO _x -MR对H ₂ O（4.2体积％的水分，100 h）和SO ₂（100 ppm）表现出良好的抵抗力，这表明其具有实际应用潜力。