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Single Pd atoms anchored graphitic carbon nitride for highly selective and stable photocatalysis of nitric oxide

发布时间：2023-01-30点击次数：

  • 影响因子：11.307
  • DOI码：10.1016/j.carbon.2022.08.031
  • 发表刊物：Carbon
  • 关键字：Single atom catalyst；Pd atoms；NO photocatalysis；CNPd catalyst；Selectivity
  • 摘要：Efficient, stable, and selective photocatalytic conversion of nitric oxide (NO) into nitrogen dioxide (NO2) is highly desirable but remains a big challenge. We prepare single atom catalyst (SAC) by anchoring single Pd atoms onto graphitic carbon nitride (CNPd) via chemical impregnation followed by calcination. The prepared CNPd SAC is confirmed by aberration-correction high-angle-annular-dark field scanning transmission electron microscopy and X-ray absorption fine structure spectroscopy. The synthesized SAC outperforms its competitors reported earlier for photocatalytic removal of NO under visible light and simulated sunlight irradiation in terms of selectivity and stability. The SAC maintains a NO removal efficiency of 83% and an instantaneous selectivity for NO2 of 92.8% over 117.6 h under simulated sunlight with the inlet NO concentration of 12 ppm. This duration is about 23.5 times the longest duration tested for other catalysts in the literature. The experimental results and density functional theory (DFT) calculations reveal that single Pd atom promotes the photocatalytic degradation of NO. Moreover, the DFT calculations prove that the nitrate ions that accumulate on the surface of the SAC can react with NO to produce NO2. This reaction enhances the selectivity for NO2 and stability of the SAC.
  • 论文类型：期刊论文
  • 卷号：200
  • 页面范围：187-198
  • 是否译文：否
  • 发表时间：2022-11-05
  • 收录刊物：SCI、EI
  • 发布期刊链接：https://www.sciencedirect.com/science/article/pii/S0008622322006443

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    博士生导师
    硕士生导师
  • 教师拼音名称：yuhesheng
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  • 所在单位：化工学院
  • 职务：Professor
  • 办公地点：中国矿业大学文昌校区综合楼203
  • 性别：男
  • 学位：博士
  • 职称：教授
  • 毕业院校：加拿大滑铁卢大学

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  • 2020当选：江苏特聘教授

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  • 2020-08-01江苏特聘教授
  • 2014-10-15加拿大国家自然科学基金工业博士后奖学金
  • 2020-08-01中国矿业大学“高端人才计划”攀登学者
  • 2019-06-01江苏省“六大人才高峰”高层次人才
  • 2018-06-28江苏省“双创博士”
  • 2016-08-01AIChE Journal Editor’s Choice Paper

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