使用碳化 (MXene) - 支持催化剂的低温氧化方式从空气中去除
Jiapeng Wang1, Kumar Vikrant1, Sherif A Younis2
1Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-Ro, Seoul, 04763, Republic of Korea.
Chemosphere
|January 6, 2024
概括
化碳化MXene (Pt@Ti3C2) 在低温下有效氧化. 1%的制剂实现了几乎完全的氧化,证明了其在空气净化方面的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 环境化学环境化学
背景情况:
- MXenes是新兴的2D无机材料,在吸附和催化方面具有显著的潜力.
- 像烯这样的芳香挥发性有机化合物是工业来源的常见空气污染物.
- 高效的低温催化氧化对于环境修复至关重要.
研究的目的:
- 合成和评估一个化碳化MXene (Pt@Ti3C2) 低温氧化催化剂.
- 为了研究加载对催化活性的影响.
- 了解参与氧化过程中的活性位点和反应机制.
主要方法:
- 合成不同含量的Pt@Ti3C2催化剂 (0.1%-2重%).
- 在低温下对的催化氧化.
- 使用X射线光电子谱学 (XPS),温度编程减小 (TPR) 和现场扩散反射红外里埃变换谱学 (in situ DRIFTS) 进行了表征.
- 在受控过程变量下对催化活性进行评估.
主要成果:
- 1%的Pt@Ti3C2-R配方在225°C时实现了97%的氧化到CO2,反应速率为0.119 mol g-1·h-1.
- 在H2流下进行的热前还原显著增加了活性氧 (O*) 和Pt2+物种.
- 通过控制催化剂质量,流量,度,湿度和流动时间来优化催化剂活性.
结论:
- Pt@Ti3C2是一种高效的低温氧化催化剂.
- 增强的催化活性归因于减少后活性氧和物种的增加.
- 这项研究提供了关于开发2D MXene基催化剂的见解,用于从空气中去除和其他挥发性有机化合物.
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