Inner Sphere Electron Transfer Promotion on Homogeneously Dispersed Fe-Nx Centers for Energy-Efficient Oxygen Reduction Reaction

ACS Applied Materials & Interfaces
Ravi NandanKaruna Kar Nanda

Abstract

The study reports the optimized incorporation of pyridinic nitrogen in nitrogen-doped carbon nanotubes (CNTs) to realize effective Fe-N x centers throughout the framework. The study unveils nitrogen as a valuable asset to promote the homogeneous dispersion of Fe moieties throughout the CNT framework, which is a necessary component to institute uniform Fe-N x centers. In addition, pyridinic nitrogen causes disruption in strongly delocalized π-electrons, which impart electron-withdrawing nature in the carbon matrix, resulting in an anodic shift in oxygen reduction reaction (ORR) onset potential (Eonset). The direct interaction of Fe-N x with O2, as evidenced by poisoning and computational studies, ensures the preferential inner sphere electron transfer mechanism. Despite the alkaline medium, the outer sphere electron transfer mechanism was muted, with suppressed HO2- generation, preferential 4e- reduction pathways, and excellent cyclic stability. The study indicates the dependency of ORR half-wave potential on the electron transfer mechanism. The poisoning study unveils the direct involvement of Fe-N x electroactive centers in facilitating ORR in alkaline medium. It further indicates a noticable increase (up to ∼25%) in perox...Continue Reading

References

Jul 14, 2007·Physical Chemistry Chemical Physics : PCCP·Jacob S Spendelow, Andrzej Wieckowski
Jul 25, 2012·Physical Chemistry Chemical Physics : PCCP·Ulrike I KrammJean-Pol Dodelet
Jan 16, 2013·Journal of the American Chemical Society·Yu ZhaoZheng Hu
May 13, 2014·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Urszula TylusSanjeev Mukerjee
Oct 16, 2015·ACS Applied Materials & Interfaces·Sreekuttan M UnniSreekumar Kurungot
Nov 10, 2015·ACS Applied Materials & Interfaces·William D McCullochYiying Wu
Dec 15, 2015·Journal of the American Chemical Society·Ulrike I KrammPeter Bogdanoff
Mar 1, 2017·ACS Applied Materials & Interfaces·Jae Hyung KimSang Hoon Joo
Jun 2, 2017·Angewandte Chemie·Chang Hyuck ChoiFrédéric Jaouen
Dec 19, 2018·Chemical Reviews·Shenzhen Xu, Emily A Carter
Mar 3, 2020·ACS Applied Materials & Interfaces·Hemam Rachna DeviKaruna Kar Nanda

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