Article 2025 · 1 atıf

High-performance multifaceted silver nanoparticle/N-rich carbon dot electrocatalysts for oxygen reduction and ethanol oxidation

Kakaei, Karim, Akbarzadeh, Sina Taleb, Aykut, Yasemin, Bayrakceken, Ayse

Özet

We synthesized cubic, silver-decorated nitrogen-doped carbon quantum dots (Ag/N-rCQDs) and tested their catalytic performance for the oxygen reduction (ORR) and ethanol oxidation (EOR) reactions in an alkaline medium. Upon the Ag/N-rCQDs electrode being exposed to an alkaline environment, the catalyst undergoes a rapid transformation into silver oxide. This transformation has been confirmed using several techniques. Given the large surface area, high nitrogen content, and ORR activity of N-rCQDs, the oxidized Ag/N-rCQDs exhibited excellent electrocatalytic activity for the ORR. This superior catalyst demonstrates near-ideal four-electron transfer, low charge transfer resistance (80 Omega.cm2), and a favorable Tafel potential (0.935 V vs. RHE) and halfwave potential (0.721 V vs. RHE). Additionally, multifaced Ag/N-rCQDs have shown promising performance for ethanol oxidation and the ability to self-regenerate by removing CO from their surface, as evidenced by electrochemical measurements (onset potential 0.5Vvs RHE). The results suggest that Ag/N-rCQDs hold significant promise as anode and cathode materials in direct ethanol fuel cells.

Anahtar Kelimeler

Multifaceted silver nanoparticles Silver oxide N -rich reduced carbon dots Oxygen Reduction Reaction Ethanol Oxidation QUANTUM DOTS HYDROTHERMAL SYNTHESIS METHANOL OXIDATION HYDROGEN EVOLUTION CATALYST SUPPORT ASCORBIC-ACID ALKALINE AG ELECTROOXIDATION FABRICATION

WoS Kategorileri

Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter

Sürdürülebilir Kalkınma Amaçları

Sağlık ve Kaliteli Yaşam

Künye

Dergi: SURFACES AND INTERFACES
Yıl: 2025
Cilt: 78
ISSN: 2468-0230
DOI: 10.1016/j.surfin.2025.108077
WoS UID: WOS:001625603400013

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