The reaction of carbon dioxide reduction with 1-butene to obtain CO and 1,3-butadiene (BD) is of great importance, but is challenging, especially achieving a highly selective transformation to BD. Herein, we conducted the first synthesis of Fe₇C₃@FeO nanoparticles supported on activated carbon (AC) which contained acid sites rather than Brønsted acids for carbon dioxide reduction with 1-butene. It was found that this material was very efficient for the reaction; in particular, the BD selectivity could be improved up to 54%. In addition, the effects of the carbon surface chemistry on the catalyst composition, structure and morphology as well as its catalytic properties were investigated. Furthermore, the surface oxygen-containing groups over AC, which provided acid sites, were proved to have played a key role in anchoring and dispersing Fe₇C₃@FeO nanoparticles, which result in the unique catalytic performance of this material.

中文翻译：

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碳材料支撑的Fe7C3 @ FeO纳米颗粒：一种高效的1-丁烯还原二氧化碳的催化剂

用1-丁烯还原二氧化碳以得到CO和1，3-丁二烯（BD）的反应非常重要，但是具有挑战性，特别是实现向BD的高选择性转化。在这里，我们进行了Fe ₇ C ₃的首次合成@FeO纳米颗粒负载在活性炭（AC）上，该活性炭包含酸性位点，而不是布朗斯台德酸，可以用1-丁烯还原二氧化碳。已发现这种材料对于反应非常有效。尤其是，BD选择性可以提高到54％。此外，研究了碳表面化学对催化剂组成，结构和形态及其催化性能的影响。此外，事实证明，AC上提供酸位的表面含氧基团在锚定和分散Fe ₇ C ₃ @FeO纳米颗粒中起着关键作用，从而导致该材料具有独特的催化性能。