Fe-based dual-atom catalysts for the oxygen reduction reaction

Abstract

This review surveys Fe-based dual-atom catalysts for oxygen reduction reactions in next-generation energy devices, including challenges with single-atom catalysts, synthetic methods, catalytic performance, and future research directions.

Mechanism of Nitrogen Coordination Modulation of Fe_Nx@BP System Catalysts on the Activity of Oxygen Reduction Reaction

“…Fe sites with low d-band centers facilitate easy desorption of terminally adsorbed OH* species from the active site. It can be found that the key factor for the alteration of the d-band center of metallic Fe atoms is due to the addition of N atoms that fundamentally modulate the electronic structure around the Fe_N x @BP system . These results confirm that the strong interaction between Fe atoms and coordination N atoms effectively accelerates the electron transfer, lowers the catalytic energy barrier, and improves the catalytic activity of the catalyst for ORR.…”

Synergizing Single-Atom and Carbon-Encapsulated Nanoparticles of Fe for Efficient Oxygen Reduction and Durable Zn–Air Batteries

“…3,4 However, oxygen reduction reaction (ORR), a critical electrochemical process within these devices, remains a bottleneck hindering their widespread adoption. 5,6 Therefore, the development of efficient ORR catalysts is essential to unlocking the full potential and accessibility of these sustainable energy systems. While Pt-based catalysts have traditionally dominated the field due to their outstanding catalytic activity, their high cost and scarcity have necessitated the exploration of alternative catalysts.…”

“…The escalating use of fossil fuels and their detrimental environmental consequences have spurred the development of renewable energy sources and innovative energy devices. , Among these advancements, metal–air batteries and fuel cells stand out as promising next-generation technologies due to their high energy density and minimal environmental footprint. , However, oxygen reduction reaction (ORR), a critical electrochemical process within these devices, remains a bottleneck hindering their widespread adoption. , Therefore, the development of efficient ORR catalysts is essential to unlocking the full potential and accessibility of these sustainable energy systems. While Pt-based catalysts have traditionally dominated the field due to their outstanding catalytic activity, their high cost and scarcity have necessitated the exploration of alternative catalysts .…”

Densely accessible Fe/Co–Nx dual-atom site coupled core–shell Co3Fe7@C as an efficient bifunctional oxygen electrocatalyst for rechargeable zinc–air batteries

“…While substantial advancement has been made in fabricating SACs with enhanced catalytic performance through the incorporation of heteroatoms or nanoparticles into the surroundings of M–N 4 sites, the integration of multiple metal atom-sites to form DACs is still in its nascent stage. 17,18 However, challenges remain, as the electronic structures of many selected metal atoms for DAC construction (such as Fe/Mn, 19 Fe/Co, 20 Fe/Ni, 21 Fe/Cu, 22 Fe/Zn, 23 etc. ) are too similar, hindering the effective disruption of symmetrical charge distribution.…”