Fe₃O₄ Nanoparticles Supported on Arc‐synthesized Carbon Nanotubes as Advanced Electrocatalyst for Oxygen Reduction Reaction

Abstract

Oxygen reduction reaction (ORR) is an important half reaction in many renewable energy conversion and storage sources. The development of efficient, cost‐effective and durable non‐precious ORR catalysts with their catalytic efficiencies close to expensive Pt‐based catalysts is promising towards large‐scale practical applications of fuel cells and metal‐air batteries. Herein, we report a facile and scalable in‐situ synthesis of Fe3O4 nanoparticles supported on carbon nanotubes hybrid material using arc‐discharge method in low‐pressure air and use Fe3O4/CNTs hybrid as a highly efficient ORR electrocatalyst. The as‐synthesized Fe3O4/CNTs catalyst shows excellent ORR catalytic activity with its performance close to or even better than the commercial 20wt% Pt/C in alkaline media due to the synergistic effect between Fe3O4 and CNTs. This study provides a new insight into non‐precious metal ORR catalysts that are feasible in alkaline membrane fuel cells and metal‐air batteries.

Trace Level Recognition of Sulfasalazine Electrooxidation Exploiting the Synergism of Carbon Nanotubes and Iron Oxide Nanoparticles

“…Fe 3 O 4 on the other hand, manifests strong adsorption ability, high abundance, low mass transfer resistance, biocompatibility, low toxicity and phenomenal magnetic and electrochemical properties [31–34] . The escalating utilization of metal nanoparticles along with carbon nanomaterial based electrochemical sensors has attracted cardinal attention due to their wide range of biomedical applications including magnetic resonance imaging, DNA separation, targeted drug delivery and various sensing platforms [35–38] …”

Purification of Carbon-Based Magnetic Nanoparticles (CMNs) Produced by Submerged Arc Discharge in Liquid Ethanol/Ethylenediamine

“…The other compound containing iron with magnetic properties is the iron oxide of Fe3O4, which has been proven to be biocompatible in bioapplications, especially when combined with carbon material (Fang, Cheng, Zhang, Zhang, & Keidar, 2018;Wang et al, 2018). Some methods that have been used to synthesize iron oxide/carbon (Fe3O4/C)-based materials include the solvothermal method (Ren, Lin, Meng, & Zhang, 2019;Vinodhkumar et al, 2020), the hydrothermal method (Li et al, 2019), and the arc discharge method (Peggiani et al, 2020;Saraswati, Retnosari, Hayati, Amalia, & Hastuti, 2018;Zhao et al, 2019). In general, the arc discharge method can be performed in both a low-pressure chamber and in a liquid medium.…”