Reverse water gas shift on the basis of chemical looping technology provides a viable method for efficiently converting CO₂ to CO for hydrocarbons at moderate temperature (<750 °C). However, the commonly available oxygen carrier materials are insufficiently active because of the degrading effect at relatively low temperatures. In this paper, we present several Co, Mn codoped ferrites in search of oxygen carrier materials as highly active redox materials for a midtemperature chemical looping CO₂ splitting process. The results show that up to ∼142.3 μmol·g^–1·min^–1 of CO production rate and ∼8.8 mmol·g^–1 of CO yield are achieved by Mn_0.2Co_0.8Fe₂O₄ at 650 °C. The production rate and yield of CO of the codoped ferrites during the CO₂ splitting process are comparable to those of the state-of-the-art perovskites which commonly contain rare-metal elements.

中文翻译：

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尖晶石结构的三价铁氧体作为化学成环CO ₂裂解的有效剂

基于化学循环技术的反向水煤气变换提供了一种可行的方法，可在中等温度（<750°C）下有效地将CO ₂转化为烃类的CO。然而，由于在较低温度下的降解作用，通常可获得的氧载体材料的活性不足。在本文中，我们提出了几种Co，Mn共掺杂的铁氧体，以寻找氧载体材料作为高活性氧化还原材料，用于中温化学循环CO ₂裂解工艺。结果表明，Mn _0.2 Co _0.8 Fe ₂可达到高达〜142.3μmol·g ^–1 ·min ^–1的CO生成率和〜8.8 mmol·g ^–1的CO生成率。O ₄在650°C下。在CO ₂分解过程中，共掺杂铁氧体的生产率和CO产量可与通常包含稀有金属元素的最新钙钛矿相媲美。