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Isolated FeN4 Sites for Efficient Electrocatalytic CO2 Reduction
Advanced Science ( IF 14.3 ) Pub Date : 2020-07-12 , DOI: 10.1002/advs.202001545
Xiaogang Li 1 , Shibo Xi 2 , Libo Sun 1 , Shuo Dou 1 , Zhenfeng Huang 1 , Tan Su 3 , Xin Wang 1
Affiliation  

The construction of isolated metal sites represents a promising approach for electrocatalyst design toward the efficient electrochemical conversion of carbon dioxide (CO2). Herein, Fe‐doped graphitic carbon nitride is rationally prepared by a simple adsorption method and is used as template to construct isolated FeN4 sites through a confined pyrolysis strategy, which avoids the agglomeration of metal atoms to particles during the synthesis process and thus provides abundant active sites for the CO2 reduction reaction. The isolated FeN4 sites lower the energy barrier for the key intermediate in the CO2 reduction process, leading to the enhanced selectivity for CO production with a faradaic efficiency of up to 93%.

中文翻译:

用于高效电催化 CO2 还原的隔离 FeN4 位点

孤立金属位点的构建代表了一种有前途的电催化剂设计方法,以实现二氧化碳(CO 2)的高效电化学转化。本文通过简单的吸附方法合理制备了Fe掺杂石墨碳氮化物,并以限制热解策略为模板,构建了孤立的FeN 4位点,避免了合成过程中金属原子向颗粒的团聚,从而提供了丰富的材料。 CO 2还原反应的活性位点。孤立的FeN 4位点降低了CO 2还原过程中关键中间体的能垒,从而提高了CO生产的选择性,法拉第效率高达93%。
更新日期:2020-09-10
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