Publications

Citation

BibTex format

@article{Gong:2025:10.1002/advs.202516060,
author = {Gong, M and Mehmood, A and Guilherme, Buzanich A and Fellinger, T and Jackson, C and Cui, J and Drazic, G and Kucernak, A},
doi = {10.1002/advs.202516060},
journal = {Advanced Science},
title = {Designing Co–N/C cathode catalysts with dense atomic cobalt sites for enhanced PEMFC performance},
url = {http://dx.doi.org/10.1002/advs.202516060},
year = {2025}
}

Download

RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Metal-nitrogen/carbon (M-N/C) catalysts, particularly those incorporating Fe, Co, or Mn, are among the most promising non-platinum group catalysts for the acidic oxygen reduction reaction (ORR) in fuel cells. This study reports a Co-N/C catalyst featuring high (3 wt%) cobalt content exclusively present as atomic sites. Extended X-ray absorption fine structure analysis confirms a tetrapyridinic Co-N4 coordination environment in the optimized (3.0)Co-N/CΔ catalyst. The high cobalt loading leads to a significant density of electrochemically accessible active sites, 3.58 × 1019 sites g−1, quantified via the nitrite stripping method. The catalyst demonstrates excellent ORR activity in a rotating ring-disk electrode setup, achieving a half-wave potential (E1/2) of 0.76 V at a low loading of 0.2 mg cm−2 and a mass activity of 3.5 A g−1 at 0.80 VRHE. Single-cell hydrogen-oxygen PEMFC tests achieve a peak power density exceeding 1.3 W cm−2 (iR-corrected). Under hydrogen-air condition, the catalyst delivers 0.54 A cm−2 at 0.60 V (0.39 W cm−2). Despite the intrinsically higher turnover frequency of Fe-based sites, the optimized (3.0)Co-N/CΔ catalyst achieves similar fuel cell performance to that of Fe-N/C, highlighting the critical role of site density in overall activity.
AU  - Gong,M
AU  - Mehmood,A
AU  - Guilherme,Buzanich A
AU  - Fellinger,T
AU  - Jackson,C
AU  - Cui,J
AU  - Drazic,G
AU  - Kucernak,A
DO  - 10.1002/advs.202516060
PY  - 2025///
SN  - 2198-3844
TI  - Designing Co–N/C cathode catalysts with dense atomic cobalt sites for enhanced PEMFC performance
T2  - Advanced Science
UR  - http://dx.doi.org/10.1002/advs.202516060
UR  - https://doi.org/10.1002/advs.202516060
ER  -

Download

Citation

BibTex format

RIS format (EndNote, RefMan)

Links

Contact Details