A catalyst consisting of atomic iron embedded in a new hierarchical carbon matrix was synthesised, and this catalyst exhibited superior performance in CO₂ electroreduction. Bamboo-like carbon nanotubes were catalytically grown by Fe₃C nanocrystals on graphene co-doped with atomic iron and nitrogen by a new approach of electrochemical oxidation of graphene films in an FeCl₄⁻-based ionic liquid followed by annealing. The highly selective generation of CO from CO₂ was achieved at a low overpotential of 0.55 V with a maximum CO faradaic efficiency of ∼95% for over 12 h.

中文翻译：

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嵌入石墨烯上的竹碳纳米管中作为高级CO ₂电催化剂的原子铁的合成

合成了由嵌入新的分层碳基体中的原子铁组成的催化剂，该催化剂在CO ₂电还原中表现出优异的性能。竹节状碳纳米管的Fe催化生长的₃ Ç纳米晶体上的石墨烯在FeCl共掺杂有铁原子和氮通过石墨烯薄膜的电化学氧化的一种新的方法₄ ^-基的离子液体，随后退火。从CO的高选择性生成CO的₂是在一个低的超电势0.55Ⅴ与的约95％的最大CO法拉第效率超过12小时来实现。