Unravelling the role of iron carbide in oxygen reduction catalysts for rechargeable zinc–air batteries: a comprehensive kinetics & mechanistic study

Abstract

Rechargeable metal-air batteries are an emerging electrochemical energy storage technology wherein the invention of bifunctional electrocatalysts for oxygen reduction (ORR) and evolution reactions (OER) play a critical role in the...

Selenium-doped mixed metal oxide nanoparticles decorated on g-C3N4 and MXene sheets as promising bifunctional oxygen electrocatalysts for rechargeable Zn–air batteries

“…Therefore, a hybrid electrocatalyst applying materials with OER and ORR capabilities should be used as an integrated form to have synergetic effects. 3–5 Recently, some reports have focused on bimetallic electrocatalysts, such as Fe/Fe 3 C in N-doped porous carbon, 6 CoFe nanoparticles on N-doped carbon sheets (CoFe@NCS), 7 FeCo alloy nanoparticles in carbon layers, 8,9 Co 0.25 Ni 0.75 alloy/N-doped carbon nanotube, 10 N-Co 0.8 Fe 0.1 Ni 0.1 S x , 11 Pd nanoparticles/F, N codoping graphene composite, 12 Mn-incorporated Co 3 O 4 , 13 carbon dots bridge NiO and Mn 2 O 3 (NiO–Mn 2 O 3 -CDs), 14 V 2 O 5 nanoribbon/reduced graphene oxide, 15 LiCoO 1.8 F 0.2 , 16 ionic liquid-derived FeCO alloys encapsulated in N-doped carbon framework, 17 Co–N-doped carbons embedded with ultrafine CoFe/Co nanoparticles, 18 FeCo alloy nanoparticles encapsulated in hollow N-doped carbon, 19 N-doped Fe 3 C containing carbon material, 20 and others.…”

Chemical fabrication and synergistic mechanism of N-doped carbon modified with FeP as catalysts for flexible rechargeable Zn–air batteries

“…However, the scarcity, high price, and poor stability of these noble metal-based electrocatalysts severely hinder the widespread application of rechargeable ZABs. 9–11 Therefore, the development of cost-efficient bifunctional and high-performance electrocatalysts for the ORR and OER is urgent for flexible rechargeable ZABs.…”