Sustainably removing low-level VOCs at room temperature especially in the presence of water vapor has great demand. Herein, single-atom Pd anchored MnO nanoparticles (Pd/MnO) were confined in the hydrophobic porous carbon matrix. As-synthesized Pd/MnO@C exhibited superior removal capacity for VOCs such as hexanal, pentanal and toluene. Under the WHSV of 450 L/g·h, the 99% removal capacity for 15 ppm hexanal at 30 °C and relative humidity (RH) 50% reached 388.8 mg/g, which was 2.4 times as that of commercial BPL activated carbon. In addition, it exhibited much better regeneration ability at low temperature (105 °C) than activated carbon. DRIFTS and EPR indicated that water vapor mediated the activation of oxygen to form hydroxyl radicals to decompose VOCs. This paper opens a new way to sustainably remove low-level VOCs at room temperature under humid conditions via the hydrophobic carbon confinement effect and single-atom catalysis.

中文翻译：

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单原子 Pd 锚定-MnO 限制在多孔碳基质中，可在室温下去除低含量的 VOC


在室温下，尤其是在水蒸气存在的情况下，可持续去除低含量的挥发性有机化合物有着巨大的需求。在此，单原子 Pd 锚定的 MnO 纳米粒子（Pd/MnO）被限制在疏水性多孔碳基质中。合成的 Pd/MnO@C 对己醛、戊醛和甲苯等 VOC 表现出优异的去除能力。在450L/g·h的WHSV下，在30℃、相对湿度（RH）50%的条件下，对15ppm己醛的99%去除能力达到388.8mg/g，是商用BPL活性炭的2.4倍。此外，它在低温（105℃）下表现出比活性炭更好的再生能力。 DRIFTS和EPR表明水蒸气介导氧的活化形成羟基自由基来分解VOC。该论文通过疏水性碳限制效应和单原子催化，开辟了一种在室温和潮湿条件下可持续去除低含量VOCs的新方法。