A Bifunctional Highly Efficient FeNx /C Electrocatalyst.,Small

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A Bifunctional Highly Efficient FeNx /C Electrocatalyst.
Small ( IF 13.0 ) Pub Date : 2018-01-11 , DOI: 10.1002/smll.201702827
Erling Li _{1,

2} , Fa Yang _{1,

2} , Zhemin Wu ₃ , Yong Wang ₃ , Mingbo Ruan ₁ , Ping Song ₁ , Wei Xing ₁ , Weilin Xu ₁

Affiliation

Herein, a type of Fe, N-codoped carbon electrocatalyst (FeNx /C, Fe-N-BCNT#BP) containing bamboo carbon nanotubes and displaying bifunctional high catalytic efficiency for both oxygen reduction reaction (ORR) and carbon dioxide reduction reaction (CO2RR) is reported. It shows high electrocatalytic activity and stability for both the ORR process with onset potential of 1.03 VRHE in alkaline and the CO2RR to CO with high faradic efficiency up to 90% and selectivity of about 100% at low overpotential of 0.49 V. For CO2RR to CO, it is revealed that Fe3 C is active but the activity of FeNx centers is lower than that of C-N-based centers, contrary with that observed for ORR. Due to its low cost and high electrocatalytic performance for these two reduction reactions, the obtained catalyst is very promising for extensive application in future. The revealed huge activity difference of the same types of active sites for different reactions can efficiently guide the synthesis of advanced materials with multifunction.

中文翻译：

一种双功能高效FeNx / C电催化剂。

本文中，一种含Fe，N掺杂的碳电催化剂（FeNx / C，Fe-N-BCNT＃BP）包含竹碳纳米管，对氧还原反应（ORR）和二氧化碳还原反应（CO2RR）均显示出双功能的高催化效率）被报告。它在ORR过程中显示出高的电催化活性和稳定性，在碱性条件下VRHE的起始电势为1.03 VRHE，在CO2RR转化为CO的过程中，法拉第效率高达90％，在低过电势为0.49 V时的选择性约为100％。，揭示了Fe3C是有活性的，但FeNx中心的活性低于CN基中心的活性，这与ORR观察到的相反。由于这两种还原反应的低成本和高电催化性能，所获得的催化剂在未来的广泛应用中非常有前途。

更新日期：2018-01-11

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