ItemArticle

Cobalt Embedded N-Doped Carbon Spheres Derived From Cassava Starch for Enhanced Oxygen Reduction Reaction in Alkaline Medium

Title
Cobalt Embedded N-Doped Carbon Spheres Derived From Cassava Starch for Enhanced Oxygen Reduction Reaction in Alkaline Medium
Creator
Toms, Snigdha; Jafri R, Imran; Vedarajan, Raman; Habibuddin, Shaik
Description
Cathodic oxygen reduction reaction (ORR) is essential for fuel cells and metal-air batteries. The sluggishness of ORR necessitates the synthesis of effective and durable catalysts to intensify the reaction process without compromising cost-effectiveness. Here, cobalt and cobalt oxides were embedded on N-doped carbon microspheres (Co?N?C/CS) using cassava starch as a carbon source. The catalyst exhibits a surface area of 388.73 m2 g?1, with a predominantly mesoporous texture. The presence of the Co?N bond, along with pyridinic and graphitic nitrogen, contributes to the ORR activity by enhancing the density of active sites. The catalyst achieves a limiting current density of ?4.64mA cm?2 with an onset potential of 0.91V (vs RHE). The calculated electron transfer value of 3.74 indicates the 4e- pathway ORR mechanism supported by Co?N?C/CS. Moreover, the catalyst demonstrates a high stability in 0.1M KOH with 99% of current retention after 14000 s, exceeding commercial Pt/C. Relatively high methanol tolerance was also observed for Co?N?C/CS by the addition of 3M methanol in the electrolyte during current-time response, highlighting its suitability as a cathode catalyst for direct methanol fuel cells (DMFC). 2026 Wiley-VCH GmbH.
Source
Particle and Particle Systems Characterization;Volume;43;Issue;4;Article No.;e70088;
Date
01-01-2026
Publisher
John Wiley and Sons Inc
Subject
biomass-derived carbon; carbon microspheres; non-noble metal catalysts; oxygen reduction reaction
Coverage
Toms S., Department of Physics and Electronics, CHRIST (Deemed to be University), Bengaluru, India; Jafri R I., Department of Physics and Electronics, CHRIST (Deemed to be University), Bengaluru, India; Vedarajan R., Centre for Fuel Cell Technology, International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI), Chennai, India; Habibuddin S., Department of Physics, School of Applied Sciences and Humanities, Vignan's Foundation for Science, Technology and Research, Guntur, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 9340866; CODEN: PPCHE
Format
online
Language
English
Type
Article

Citation

Toms, Snigdha; Jafri R, Imran; Vedarajan, Raman; Habibuddin, Shaik, “Cobalt Embedded N-Doped Carbon Spheres Derived From Cassava Starch for Enhanced Oxygen Reduction Reaction in Alkaline Medium,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 18, 2026, https://archives.christuniversity.in/items/show/21805.

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