MXene负载的锇单原子催化剂Os1/Ti2CS2催化低温CO氧化反应的理论研究(英文) |
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作者姓名: | 孟洋 梁锦霞 朱纯 许聪俏 李隽 |
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作者单位: | 1. School of Chemistry and Chemical Engineering, Guizhou University;2. Department of Chemistry, Southern University of Science and Technology;3. Department of Chemistry and Key Laboratory of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Tsinghua University |
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基金项目: | supported by the National Natural Science Foundation of China (21963005, 21763006, 22033005 and 22038002);;the Natural Science Foundation of Guizhou University ([2021]40 and [2020] 32);;Guangdong Provincial Key Laboratory of Catalysis (2020B121201002); |
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摘 要: | 本文报道了一种对CO氧化反应具有低温催化活性的新型硫功能化MXene-Ti2C (Ti2CS2)负载的锇金属单原子催化剂Os1/Ti2CS2.通过密度泛函理论计算,从一系列过渡金属(M=Fe, Co, Ni, Cu; Ru, Rh, Pd,Ag; Os, Ir, Pt, Au)中筛选出最稳定的锇金属单原子催化剂.计算结果表明, Os1/Ti2CS2有利于O2和CO的共吸附,且O2分子的吸附能略高于CO分子.此外,由于O2+2CO能稳定地共吸附在Os1单原子上, CO氧化反应可能通过三分子反应机理进行.因此,我们研究了CO在Os1/Ti2CS2单原子催化剂上发生氧化反应的四种不同的催化机理:Langmuir-Hinshelwood (L–H)、Eley Rideal (E–R)、termolecular L...
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