Co3Fe7 Alloy Nanoparticles Encapsulated in N-Doped Carbon as Oxygen-Reduction Electrocatalysts for Rechargeable Zinc-Air Batteries DOI

Yang Xiang,

Meiqi Li, Li Ping

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Bimetallic alloy catalysts have become highly sought-after star in the oxygen reduction reaction (ORR) due to their excellent catalytic activity and stability. In this study, an optimal catalyst (Co3Fe7@NC-800) involving Co3Fe7 nanoparticles encapsulated by N-doped carbon shield was constructed employing Co-ZIF g-C3N4 assisted with Fe ions as source precursors through impregnation-calcination method. The demonstrates a remarkable 4e– ORR alkaline electrolyte high half-wave potential (E1/2) of up 0.94 V, large limiting current density (JL) 5.81 mA·cm–2, good durable stability, surpassing benchmark Pt/C catalyst. It simultaneously displays moderate evolution (OER) overpotential 355.6 mV at 10 mA·cm–2 (EJ=10). Driven small gap ΔE 0.646 rechargeable zinc-air battery (ZAB) applied air cathode delivers power 141.7 mW·cm–2 specific capacity 800 mAh·gZn–1, rate capability, cycling stability over 200 h 5 mA·cm–2. superior ZAB performance perhaps result from synergy abundant available active sites mediated bimetallic defects. This work will expand application non-noble metal for future metal-air batteries energy systems.

Language: Английский

A facile approach for synthesizing nitrogen-doped carbon supported circular trough-shaped FeCo alloy for the oxygen reduction reaction DOI
Kun Yang, Jing Liu, Bin Li

et al.

Chemical Communications, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

A nitrogen-doped carbon-supported circular trough-shaped FeCo alloy-based electrocatalyst (FeCo/NC) was synthesized by a simple-to-accomplish method. The unique alloy structure and rich Fe/Co-Nx-based active sites constructed during the pyrolysis process endowed FeCo/NC with comparable electrocatalytic ORR activity in both three-electrode system Zn-air batteries to that of previously reported catalysts.

Language: Английский

Citations

0
Co3Fe7 Alloy Nanoparticles Encapsulated in N-Doped Carbon as Oxygen-Reduction Electrocatalysts for Rechargeable Zinc-Air Batteries DOI

Yang Xiang,

Meiqi Li, Li Ping

et al.

ACS Applied Nano Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Bimetallic alloy catalysts have become highly sought-after star in the oxygen reduction reaction (ORR) due to their excellent catalytic activity and stability. In this study, an optimal catalyst (Co3Fe7@NC-800) involving Co3Fe7 nanoparticles encapsulated by N-doped carbon shield was constructed employing Co-ZIF g-C3N4 assisted with Fe ions as source precursors through impregnation-calcination method. The demonstrates a remarkable 4e– ORR alkaline electrolyte high half-wave potential (E1/2) of up 0.94 V, large limiting current density (JL) 5.81 mA·cm–2, good durable stability, surpassing benchmark Pt/C catalyst. It simultaneously displays moderate evolution (OER) overpotential 355.6 mV at 10 mA·cm–2 (EJ=10). Driven small gap ΔE 0.646 rechargeable zinc-air battery (ZAB) applied air cathode delivers power 141.7 mW·cm–2 specific capacity 800 mAh·gZn–1, rate capability, cycling stability over 200 h 5 mA·cm–2. superior ZAB performance perhaps result from synergy abundant available active sites mediated bimetallic defects. This work will expand application non-noble metal for future metal-air batteries energy systems.

Language: Английский

Citations

2