规则 通过双单原子的晶格氧气流动性,同时增强VOC氧化和NO减少
Peiqi Chu1, Long Zhang1, Zhiwei Wang1
1Beijing Key Laboratory for Green Catalysis and Separation, Key Laboratory of Beijing on Regional Air Pollution Control, Key Laboratory of Advanced Functional Materials, Education Ministry of China, College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China.
Environmental science & technology
|September 16, 2024
概括
一种新的双单原子催化剂有效地去除诸如挥发性有机化合物 (VOC) 和氧化 (NOx) 等多种污染物. 这一突破可以防止亚酸盐过氧化,使空气可以同时净化.
科学领域:
- 环境催化剂环境催化剂
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 严格的排放标准需要高效的多重污染物清除技术.
- 在催化氧化过程中控制酸盐等中间物种是具有挑战性的.
- 支持的贵金属催化剂具有潜力,但在选择性方面面临挑战.
研究的目的:
- 开发一种协同催化剂,同时去除挥发性有机化合物 (VOC) 和氧化 (NOx).
- 为应对催化过程中酸盐中间体过氧化的挑战.
- 为了研究空气净化双单原子催化剂的性能.
主要方法:
- 在 (CeO2) 上支持的 (Pd) 和 (V) 双单原子催化剂的设计和合成.
- 催化剂结构和活性位点的表征.
- 对同时进行VOC氧化和NOx减排的催化性能进行评估.
主要成果:
- 双单原子催化剂Pd1V1/CeO2在转化NOx和烯方面表现出高效率.
- 催化剂表现出一个广泛的操作温度窗口,以减少NOx.
- 观察到Pd和V单个原子和表面氧之间的协同相互作用,抑制酸盐过氧化.
结论:
- 开发的双单原子催化剂为同时进行VOC和NOx净化提供了一个有前途的解决方案.
- 使用与贵金属的过渡元素连接体的策略增强了催化选择性.
- 这项研究促进了环境修复有效催化剂的开发.
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