A durable and robust Fe–N–C electrocatalyst for oxygen reduction reactions by introducing Ti3C2–TiO2 as radical scavengers

Gu, Wenling; Xu, Jianbo; Sun, Jing; Zhao, Tianshou

doi:10.1016/j.ijhydene.2022.11.048

Cited by 9 publications

(2 citation statements)

References 55 publications

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“…ZAB has drawn the attraction of researchers as one of the potential energy storage and conversion technologies. − The two variables that have the greatest influence on ZAB performance are the characteristics of ORR and OER. However, the commercial growth and application of ZAB are constrained by the slow kinetics of the ORR and OER. − The general trend to address this problem is to create a bifunctional oxygen electro-catalyst to catalyze ORR and OER. − …”

Section: Introductionmentioning

confidence: 99%

Fe–N/P-co-Doped Three-Dimensional Graphene Bifunctional Oxygen Electrocatalysts for Rechargeable Zinc–Air Batteries

Duan,

Wang,

Sun

et al. 2023

ACS Appl. Nano Mater.

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The evolution of highly active dual-functional catalysts is critical to zinc–air batteries (ZAB). Herein, three-dimensional Fe–N/P-co-doped graphene (3D Fe–N/P-G) materials with a high oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) response are prepared by a molten salt protection method with KCl. The 3D Fe–N/P-G exhibits a large Brunauer–Emmett–Teller (BET) surface area and a dense network of pores for improved mass transfer efficiency. The addition of P atoms is able to produce a synergistic effect that improves the ORR catalytic activity of the 3D Fe–N/P-G catalyst. Regarding electrical efficiency, the ORR half-wave potential (E 1/2) of 3D Fe–N/P-G catalytic is 0.860 V vs reversible hydrogen electrode (RHE) and the electron transfer number is 3.98 from 0.4 to 0.7 V vs RHE. The small overvoltage (ΔE = E j = 10 – E 1/2) of 3D Fe–N/P-G is 0.77 V. Additionally, the zinc–air battery with 3D Fe–N/P-G as a trigger for the cathode has high power density (170 mW cm–2), specific capacity (671 mAh g–1), small charge/discharge polarization, and outstanding prolonged stability. It is suggested that 3D Fe–N/P-G is a powerful bifunctional cathode ZAB catalyst.

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Section: Introductionmentioning

confidence: 99%

Fe–N/P-co-Doped Three-Dimensional Graphene Bifunctional Oxygen Electrocatalysts for Rechargeable Zinc–Air Batteries

Duan,

Wang,

Sun

et al. 2023

ACS Appl. Nano Mater.

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“…Specifically, adding other oxide species into Fe-N-C can proactively scavenge radicals and maintain efficient ORR activity. 24 For instance, Zhao and co-workers 25 introduced Ti 3 C 2 -TiO 2 nanoparticles as radical scavengers in Fe-N-C catalysts, which was demonstrated to prominent ORR performance via effectively scavenging •OH radicals or decomposing H 2 O 2 molecules. Sun et al 26 employed CeO 2 nanoparticles as radical scavengers adjacent to the Fe-N 4 , which shortened the survival time and the regional space of radicals via instantaneously eliminating radicals.…”

Section: Introductionmentioning

confidence: 99%

Mn Single-Atom Tuning Fe-N-C Catalyst Enables Highly Efficient and Durable Oxygen Electrocatalysis and Zinc–Air Batteries

Ran,

Xu,

Zhu

et al. 2023

ACS Nano

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Fe-N-C catalyst is one of most promising candidates for oxygen electrocatalysis reaction in zinc–air batteries (ZABs), but achieving sustained high activity is still a challenging issue. Herein, we demonstrate that introducing Mn single atoms into Fe-N-C (Mn1@Fe-N-C/CNTs) enables the realization of highly efficient and durable oxygen electrocatalysis performance and application in ZABs. Multiple characterizations confirm that Mn1@Fe-N-C/CNTs is equipped with Mn-N2O2 and Fe-N4 sites and Fe nanoparticles. The Mn-N2O2 sites not only tune the electron structure of Fe-N x sites to enhance intrinsic activity, but also scavenge the attack of radicals from Fe-N x sites for improvement in ORR durability. As a result, Mn1@Fe-N-C/CNTs exhibits enhanced ORR performance to traditional Fe-N-C catalysts with high E 1/2 of 0.89 V vs reversible hydrogen electrode (RHE) and maintains ORR activity after 15 000 CV. Impressively, Mn1@Fe-N-C/CNTs also presents excellent OER activity and the difference (ΔE) between E 1/2 of ORR and OER potential at 10 mA cm–2 (E j10) is only 0.59 V, outperforming most reported catalysts. In addition, the maintainable bifunctional activity of Mn1@Fe-N-C/CNTs is demonstrated in ZABs with almost unchanged cycle voltage efficiency up to 200 h. This work highlights the critical role of Mn single atoms in enhancing ORR activity and stability, promoting the development of advanced catalysts.

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Insight into synergy for oxygen reduction electrocatalysis of iron-nitrogen-carbon

Liu,

Rao,

Zhang

et al. 2024

Chem

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A durable and robust Fe–N–C electrocatalyst for oxygen reduction reactions by introducing Ti3C2–TiO2 as radical scavengers

Cited by 9 publications

References 55 publications

Fe–N/P-co-Doped Three-Dimensional Graphene Bifunctional Oxygen Electrocatalysts for Rechargeable Zinc–Air Batteries

Fe–N/P-co-Doped Three-Dimensional Graphene Bifunctional Oxygen Electrocatalysts for Rechargeable Zinc–Air Batteries

Mn Single-Atom Tuning Fe-N-C Catalyst Enables Highly Efficient and Durable Oxygen Electrocatalysis and Zinc–Air Batteries

Insight into synergy for oxygen reduction electrocatalysis of iron-nitrogen-carbon

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