The adsorption of the C2 hydrocarbons, including ethane, ethene, and ethyne, are studied on magnetite Fe₃O₄(001) by a combination of molecular beam dosing, temperature programmed desorption, and X-ray photoelectron spectroscopy. The ethane desorption profile has a single temperature invariant peak at 100 K, while ethene and ethyne exhibit additional peaks at ∼120 -and ∼135 K. An inversion analysis is used to extract coverage-dependent desorption energies as well as coverage-averaged prefactors for each molecule. Ethene and ethyne exhibit moderate coverage-dependent desorption energies decreasing from ∼80 to ∼30 kJ/mol at saturation, while ethane shows a relatively coverage invariant desorption energy ∼28 kJ/mol. The desorption energies of the C2 hydrocarbons increase in the order of increasing bond order. This is likely due to the enhanced interaction of the ethene and ethyne π system to the coordinatively unsaturated octahedral Fe sites (Fe_oct) on the oxide surface. The saturation coverages of each C2 hydrocarbon at 82 K were also determined. These match well with the 2-dimensional area determined from their liquid densities.

对包括乙烷、乙烯和乙炔在内的 C2 烃类在磁铁矿 Fe ₃ O ₄上的吸附进行了研究(001) 通过分子束定量、程序升温脱附和 X 射线光电子能谱的组合。乙烷解吸曲线在 100 K 处有一个单一的温度不变峰，而乙烯和乙炔在 ~120 和 ~135 K 处表现出额外的峰。反演分析用于提取依赖于覆盖率的解吸能量以及覆盖率平均的前因子每个分子。乙烯和乙炔表现出中等的覆盖率依赖性解吸能，饱和时从~80 kJ/mol 降低到~30 kJ/mol，而乙烷显示出相对覆盖不变的解吸能~28 kJ/mol。C2 烃的解吸能按键序增加的顺序增加。这可能是由于乙烯和乙炔 π 系统与配位不饱和八面体 Fe 位点（Fe_oct ) 在氧化物表面上。还确定了 82 K 下每种 C2 烃的饱和度覆盖率。这些与根据其液体密度确定的二维面积非常匹配。