The conversion of carbon dioxide (CO₂) with hydrogen (H₂), generated by renewable energy sources, into value-added products is a promising approach to meet future demands for sustainable development. In this context, the hydrogenation of CO₂ (CO₂-FTS) to higher hydrocarbons (C₂₊), lower olefins, and fuels should be mentioned in particular. These products are used in our daily lives but are currently produced by energy-intensive and CO₂-emitting oil-based cracking processes. The environmental compatibility and abundance of iron (Fe) used in CO₂-FTS catalysts are also relevant to sustainable development. The CO₂-FTS reaction was inspired by the experience accumulated in long-term research on Fischer–Tropsch synthesis with CO (CO-FTS). A simple grafting of catalyst formulations and reaction mechanisms from CO-FTS to CO₂-FTS has, however, been proven unsatisfactory, likely due to differences in surface adsorbates, chemical potentials of CO and CO₂, and H₂O partial pressure. These characteristics affect both the catalyst structure and the reaction pathways. Consequently, CO₂-FTS provides higher CH₄ selectivity but lower C₂₊-selectivity than does CO-FTS, which appeals to fundamental research to hinder CH₄ formation.

中文翻译：

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从了解催化剂功能到控制 CO2 加氢反应中的选择性，再到 Fe 基催化剂上的更高烃类


将可再生能源产生的二氧化碳 （CO₂） 与氢气 （H₂） 转化为增值产品是满足未来可持续发展需求的一种有前途的方法。在这种情况下，应特别提到 CO₂ （CO 2-FTS） 氢化为高级碳氢化合物 （C₂₊）、低级烯烃和燃料。这些产品在我们的日常生活中使用，但目前是通过能源密集型和排放 CO₂ 的油基裂解工艺生产的。CO 2-FTS 催化剂中使用的环境相容性和铁 （Fe） 的丰度也与可持续发展有关。CO_2-FTS 反应的灵感来自于长期研究中使用 CO 合成费托法 （CO-FTS） 所积累的经验。然而，催化剂配方和反应机理从 CO-FTS 简单地接枝为 CO_2-FTS 已被证明并不令人满意，这可能是由于表面吸附物、CO 和 CO₂ 的化学势以及 H₂O 分压的差异。这些特性会影响催化剂结构和反应途径。因此，与 CO-FTS 相比，CO_2-FTS 提供更高的 CH₄ 选择性，但提供更低的 C₂₊ 选择性，后者吸引基础研究来阻碍 CH₄ 的形成。