Progress in the Development of Fe-Based PGM-Free Electrocatalysts for the Oxygen Reduction Reaction

Advanced Materials
Ulises MartinezPiotr Zelenay

Abstract

Development of alternative energy sources is crucial to tackle challenges encountered by the growing global energy demand. Hydrogen fuel, a promising way to store energy produced from renewable power sources, can be converted into electrical energy at high efficiency via direct electrochemical conversion in fuel cells, releasing water as the sole byproduct. One important drawback to current fuel-cell technology is the high content of platinum-group-metal (PGM) electrocatalysts required to perform the sluggish oxygen reduction reaction (ORR). Addressing this challenge, remarkable progress has been made in the development of low-cost PGM-free electrocatalysts synthesized from inexpensive, earth-abundant, and easily sourced materials such as iron, nitrogen, and carbon (Fe-N-C). PGM-free Fe-N-C electrocatalysts now exhibit ORR activities approaching that of PGM electrocatalysts but at a fraction of the cost, promising to significantly reduce overall fuel-cell technology costs. Herein, recent developments in PGM-free electrocatalysis, demonstrating increased fuel-cell performance, as well as efforts aimed at understanding the key limiting factor, i.e., the nature of the PGM-free active site, are summarized. Further improvements will...Continue Reading

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Citations

Aug 3, 2019·Advanced Materials·Quentin MeyerChuan Zhao
Dec 5, 2019·Angewandte Chemie·Kavita KumarFrédéric Maillard
Jul 10, 2020·Advanced Materials·Minhan LiJianping Yang
Dec 21, 2019·Chemical Science·Batyr GarlyyevFederico Calle-Vallejo
Jul 28, 2020·Nanomaterials·Antonia Kagkoura, Nikos Tagmatarchis
Jul 11, 2020·Journal of Colloid and Interface Science·Yunchuang WangGuangcheng Yang
May 15, 2020·ACS Applied Materials & Interfaces·Tete ZhaoXiaoming Sun
Mar 20, 2020·The Journal of Physical Chemistry Letters·Alexandra Zagalskaya, Vitaly Alexandrov
Oct 27, 2021·ACS Applied Materials & Interfaces·Rongmin DunWenmu Li
Jan 6, 2022·Journal of the American Chemical Society·Jason S BatesShannon S Stahl

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