Abstract This work reports a facile calcination-soak approach for the large-scale growth of Co-Mn composite shell over the cores of copper mesh and foam resulting in Co-Mn@CuO nanowires. In the synthesis of Co-Mn@CuO core/shell structure, CuO nanowires were first formed on copper mesh through a facile calcination, followed by Co-Mn compounds (MnO2 and CoOOH or Co(OH)3) soaking to form a coat on the outer surface of CuO nanowires attributed to the redox reaction between MnO4− and Co2+, which were calcined in air to get the final Co-Mn oxide. The thickness of the Co-Mn oxide shell over CuO nanowire could be easily tuned by soaking duration. The prepared Co-Mn@CuO nanowires were applied as monolithic catalysts in plasma-catalytic oxidation of toluene and decomposition of ozone. The catalytic performance was enhanced to ~88% at 1.0 A and ~95% at 1.5 A with the filling of Co-Mn@CuO core/shell structure as monolith catalyst, which could be attributed to the synergistic effect of plasma and catalytic effect. Using Co-Mn@CuO, 95% ozone conversion was achieved at room temperature credited to the presence of mixed-valent manganese ions in the catalyst.

中文翻译：

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Co-Mn@CuO核壳纳米线在铜网/泡沫上的原位制备和催化性能

摘要 这项工作报告了一种简便的煅烧-浸泡方法，用于在铜网和泡沫芯上大规模生长 Co-Mn 复合材料壳，从而形成 Co-Mn@CuO 纳米线。在 Co-Mn@CuO 核/壳结构的合成中，首先通过简单的煅烧在铜网上形成 CuO 纳米线，然后通过 Co-Mn 化合物（MnO2 和 CoOOH 或 Co(OH)3）浸泡在铜网上形成涂层。 CuO 纳米线的外表面归因于 MnO4− 和 Co2+ 之间的氧化还原反应，将其在空气中煅烧以获得最终的 Co-Mn 氧化物。通过浸泡时间可以很容易地调节 CuO 纳米线上的 Co-Mn 氧化物壳的厚度。制备的 Co-Mn@CuO 纳米线作为整体催化剂应用于甲苯的等离子体催化氧化和臭氧的分解。催化性能在 1.0 A 时提高到~88%，在 1 A 时提高到~95%。5 A 填充 Co-Mn@CuO 核/壳结构作为整体催化剂，这可能归因于等离子体和催化作用的协同作用。使用 Co-Mn@CuO，在室温下实现了 95% 的臭氧转化率，这归功于催化剂中混合价锰离子的存在。