Abstract Because of its contribution to greenhouse effect, carbon dioxide conversion to valuable chemicals is one of the most challenging issues facing the modern world. A new type of iron catalysts of CO2 hydrogenation into hydrocarbons was synthesized by spark plasma sintering of carbon nanotubes decorated with iron oxide nanoparticles. This treatment produced carbon-encapsulated iron nanocrystals embedded in a dense framework of CNTs. The sintered catalysts were tested without pre-reduction in CO2 hydrogenation under supercritical conditions (350 °C, 8.5 MPa) and showed high specific activities of 5.4–12.2 molCO2gFe−1s−1 and promising C2+ selectivities of 40–50 mol.% at rather low H2:CO2 ratios of 1 and 2. The high efficiency of the catalysts was attributed to the stabilization of metal nanoparticles by carbon shells and increased density of CNT support, which led to higher degree of metal – support interaction and intensified carbidization and CO activation.

中文翻译：

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用于 CO2 加氢生成碳氢化合物的烧结 Fe/CNT 骨架催化剂

摘要 由于其对温室效应的贡献，将二氧化碳转化为有价值的化学品是现代世界面临的最具挑战性的问题之一。通过放电等离子烧结氧化铁纳米粒子修饰的碳纳米管，合成了一种新型的CO2加氢制烃铁催化剂。这种处理产生了嵌入碳纳米管致密框架中的碳包封铁纳米晶体。在超临界条件（350°C，8.5 MPa）下测试了未预还原 CO2 氢化的烧结催化剂，并显示出 5.4-12.2 molCO2gFe-1s-1 的高比活性和 40-50 mol.% 的有希望的 C2+ 选择性低 H2:CO2 比率为 1 和 2。