Facile preparation and properties of high nitrogen-containing Fe/Co/N co-doped three-dimensional graphene bifunctional oxygen catalysts for zinc air battery

Ji, Changhui; Zhang, Tingwei; Sun, Peng; Li, Ping; Wang, Jigang; Zhang, Lei; Sun, Yinggang; Duan, Wenjie; Liu, Guohong

doi:10.1016/j.ijhydene.2023.03.333

Cited by 13 publications

(5 citation statements)

References 61 publications

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“…In order to test the stability of the catalysts, an accelerated long-cycle test was performed, and according to Figure e, it can be seen that the catalysts remained 90% efficient after 56,000 s, while the Pt/C catalysts had an efficiency of 76%. As shown in Figure f, it can be observed that CoFe 2 O 4 @CN electron transfer number is 3.9, which is similar to commercial Pt/C ( n = 3.97), indicating that CoFe 2 O 4 @CN belongs to the nearly four-electron reaction process. , It can also be seen from Figure f that both CoFe 2 O 4 @CN and commercial Pt/C hydrogen peroxide yields are below 20%, which is consistent with the RDE test results.…”

Section: Resultssupporting

confidence: 82%

“…As shown in Figure 5f, it can be observed that CoFe 2 O 4 @CN electron transfer number is 3.9, which is similar to commercial Pt/C (n = 3.97), indicating that CoFe 2 O 4 @CN belongs to the nearly four-electron reaction process. 48,49 It can also be seen from Figure 5f that both CoFe 2 O 4 @CN and commercial Pt/C hydrogen peroxide yields are below 20%, which is consistent with the RDE test results.…”

Section: Physical Characterizationsupporting

confidence: 83%

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Construction of Bimetallic-Anchored Two-Dimensional Nanosheets on COF for Rechargeable Zinc-Air Batteries

Kang,

Su,

Lei

2024

ACS Appl. Mater. Interfaces

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The preparation of carbon materials by doping bimetallic oxides into triazine frameworks (COFs) is a promising electrocatalyst with the potential to replace precious metals in energy storage systems. In this experiment, a covalent triazine framework (COF) was synthesized by 1,4-dicyanobenzene (DCB) and zinc chloride, in which the COF and transition metals were used as carbon, nitrogen, cobalt, and iron sources. According to the properties of this COF, the destruction of the catalyst during pyrolysis can be prevented. The enhanced catalytic performance of the catalysts can be seen by testing all of the samples of catalysts in an alkaline medium. The high half-wave potential (E 1/2 ) of 0.86 V is comparable to Pt/C and also shows excellent durability by testing. Zinc-air batteries were assembled using the prepared catalysts, and the batteries were tested for specific capacity (548 mAh g −1 ) and power density (189 mW cm −2 ). This work provides a new direction for COF-derived catalysts for carbon materials.

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Section: Resultssupporting

confidence: 82%

Section: Physical Characterizationsupporting

confidence: 83%

Construction of Bimetallic-Anchored Two-Dimensional Nanosheets on COF for Rechargeable Zinc-Air Batteries

Kang,

Su,

Lei

2024

ACS Appl. Mater. Interfaces

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“…Therefore, ZAB with 3D Fe–N/P-G as the catalyst has a higher charge transfer rate and a smaller R ct . Meanwhile, the slope of ZAB with 3D Fe–N/P-G as the catalyst is higher than that of ZAB with 3D Fe–N-G as the catalyst in the high-frequency region, which indicates that ZAB with 3D Fe–N/P-G as the catalyst has a faster substance diffusion process . The ZAB with 3D Fe–N/P-G possesses a charge/discharge plateau that has not changed significantly after 150 h of testing (Figure f).…”

Section: Resultsmentioning

confidence: 95%

“…Meanwhile, the slope of ZAB with 3D Fe−N/P-G as the catalyst is higher than that of ZAB with 3D Fe−N-G as the catalyst in the high-frequency region, which indicates that ZAB with 3D Fe−N/P-G as the catalyst has a faster substance diffusion process. 16 The ZAB with 3D Fe−N/P-G possesses a charge/discharge plateau that has not changed significantly after 150 h of testing (Figure 6f). Nevertheless, the ZAB with 20 wt % Pt/C+RuO 2 demands high overpotential in the charging process, and the electrostriction D−C cycle capability becomes inconsistent after 50 h. The durability of ZAB with 3D Fe−N/P-G as a cathode catalyst was tested at different current densities.…”

Section: Tests Of Oer Performancementioning

confidence: 97%

“…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%

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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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Multi-layered active sites attached in 1D/3D hierarchical conductive network promote dioxygen fragmentation

Lu¹,

Zhang²,

Han³

et al. 2023

Applied Surface Science

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Facile preparation and properties of high nitrogen-containing Fe/Co/N co-doped three-dimensional graphene bifunctional oxygen catalysts for zinc air battery

Cited by 13 publications

References 61 publications

Construction of Bimetallic-Anchored Two-Dimensional Nanosheets on COF for Rechargeable Zinc-Air Batteries

Construction of Bimetallic-Anchored Two-Dimensional Nanosheets on COF for Rechargeable Zinc-Air Batteries

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

Multi-layered active sites attached in 1D/3D hierarchical conductive network promote dioxygen fragmentation

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