在聚合碳化物上通过P和过渡金属双位点选择性氧化H2S
Yu Huang1, Huanglan Xue1, Yi Li1,2
1State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry, Fuzhou University, Fuzhou, P.R. China.
Chemistry (Weinheim an der Bergstrasse, Germany)
|December 12, 2025
概括
嵌入添加碳化物中的铁和显示出对硫化 (H2S) 有效氧化有希望. 这些催化剂有助于选择性地将H2S转化为元素硫,为催化剂设计提供了洞察力.
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.
- 计算化学计算化学
背景情况:
- 高效和选择性的硫化 (H2S) 氧化对于各种工业过程至关重要.
- 开发具有高密度活性位点和增强稳定性的催化剂仍然是一个重大挑战.
研究的目的:
- 为了研究过渡金属嵌入添加碳化物 (TM-P@melon) 的催化性能和反应机制,用于H2S氧化.
- 通过理论计算确定有前途的催化剂候选者.
主要方法:
- 密度函数理论 (DFT) 的计算被用来系统地研究TM-P@melon催化剂 (TM = Sc,Ti,V,Cr,Mn,Fe,Co,Ni,Cu,Zn).
- 计算了吉布斯自由能量变化 (ΔG),以评估H2S氧化到元素硫的潜在决定步骤.
主要成果:
- FeN4-P@melon和MnN4-P@melon被确定为最有前途的催化剂.
- 这些催化剂在关键反应步骤中表现出相应的0.24 eV和0.07 eV的有利的吉布斯自由能量变化.
- 固定过渡金属 (TM) 和 (P) 原子之间的协同效应缩小了瓜子-碳化物 (CN) 带间隙,并改善了O2吸附/激活.
结论:
- 该研究为设计高效和选择性的H2S氧化催化剂提供了基本的理论见解.
- 阐明了控制催化过程的原子级机制,为合理的催化剂开发铺平了道路.
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