Scholarlink

<p>The selective photocatalytic decomposition of NO under oxygen-rich conditions presents a significant challenge, largely due to the preferential reduction of O<sub>2</sub> over NO. To overcome this limitation, we develop an F-modified polymeric carbon nitride catalyst (e-FCN). Under visible light irradiation in simulated ambient air (20% O<sub>2</sub>), the e-FCN catalyst achieves 85% NO conversion with 92% selectivity toward N<sub>2</sub>. It exhibits high apparent quantum yields for N<sub>2</sub> formation (29.1% at 365 nm and ≥ 9.9% between 405 and 465 nm) and maintains its performance over 12 consecutive cycles without deactivation. Mechanistic investigations indicate that the incorporation of a C–F bond suppresses the detrimental C=O formation from O<sub>2</sub> activation, thereby passivating the catalyst toward O<sub>2</sub>. Concurrently, e-FCN selectively adsorbs NO and promotes N–N coupling between adjacent NO molecules, ultimately converting NO to N<sub>2</sub> via an N<sub>2</sub>O intermediate. This synergy of selective NO adsorption and controlled decomposition enables selective and oxygen-tolerant photocatalytic NO decomposition.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

C-F bond integration in polymeric carbon nitride enables oxygen-tolerant photocatalytic reduction of NO to N2

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年12月10日

查看全文
  • Shen Zhao,
  • Wonyong Choi

摘要

The selective photocatalytic decomposition of NO under oxygen-rich conditions presents a significant challenge, largely due to the preferential reduction of O2 over NO. To overcome this limitation, we develop an F-modified polymeric carbon nitride catalyst (e-FCN). Under visible light irradiation in simulated ambient air (20% O2), the e-FCN catalyst achieves 85% NO conversion with 92% selectivity toward N2. It exhibits high apparent quantum yields for N2 formation (29.1% at 365 nm and ≥ 9.9% between 405 and 465 nm) and maintains its performance over 12 consecutive cycles without deactivation. Mechanistic investigations indicate that the incorporation of a C–F bond suppresses the detrimental C=O formation from O2 activation, thereby passivating the catalyst toward O2. Concurrently, e-FCN selectively adsorbs NO and promotes N–N coupling between adjacent NO molecules, ultimately converting NO to N2 via an N2O intermediate. This synergy of selective NO adsorption and controlled decomposition enables selective and oxygen-tolerant photocatalytic NO decomposition.