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Atomically Dispersed Fe and Ni Sites for Efficient and Durable Oxygen Electrocatalysis. | LitMetric

Atomically Dispersed Fe and Ni Sites for Efficient and Durable Oxygen Electrocatalysis.

Angew Chem Int Ed Engl

Department of Chemistry and Chemical Biology & Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey, 08854, USA.

Published: December 2024

AI Article Synopsis

Article Abstract

Developing highly efficient, cost-effective, and robust electrocatalysts for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is paramount for the large-scale commercialization of renewable fuel cells and rechargeable metal-air batteries. Herein, a new ternary-atom catalyst that is composed of paired Fe sites and single Ni sites (as Fe-N and Ni-N) coordinated onto hollow nitrogen-doped carbon microspheres is developed. The as-synthesized catalyst exhibits remarkable activities toward both the ORR and OER in alkaline media, with superior performances to those of the control materials that contain only Fe-N or Ni-N sites. Density functional theory calculations and in situ infrared (IR) spectroscopic studies clearly reveal that the Fe-N centers are the active sites for both ORR and OER, and their electrocatalytic activities are synergistically enhanced through optimization of their d-band centers by the Ni-N sites. This ternary-atom catalyst can potentially be a promising, alternative, sustainable catalyst to commercially used Pt- and Ru-based catalysts to drive both the ORR and the OER in rechargeable zinc-air batteries and other related applications.

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Source
http://dx.doi.org/10.1002/anie.202421168DOI Listing

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