High‐efficiency electrocatalysts are critical for advancing sustainable energy technologies, yet challenges such as high costs, limited stability, and reproducibility hinder their widespread adoption. This study introduces novel carbon‐supported Fe‐group composite catalysts (Fe, Co, and Mo), synthesized via a scalable two‐step reduction method, offering a cost‐effective alternative to precious metal catalysts for the electrooxidation ofhydrogen peroxide derived from sodium perborate in nonmembranous fuel cells. Structural characterization using X‐ray diffraction (XRD), scanning electron microscope (SEM), and X‐ray photoelectron spectroscopy (XPS) confirmed a face‐centered cubic (fcc) phase with a homogeneous solid‐solution structure and uniform dispersion of the composites on the carbon support. Electrochemical evaluation at ambient temperature revealed that molybdenum‐containing catalysts, notably Fe 60 Co 30 Mo 10 /C and Fe 60 Mo 40 /C, exhibited superior activity compared to molybdenum‐free and pure iron counterparts. Durability tests in a nonmembranous hydrogen peroxide fuel cell demonstrated exceptional stability for the ternary Fe 60 Co 30 Mo 10 /C anode over binary compositions. These findings underscore molybdenum's pivotal role in enhancing iron oxidation and activating cobalt sites, significantly boosting catalytic performance. This work highlights the potential of Fe‐group composite catalysts as high‐performance, cost‐effective solutions for next‐generation fuel cell technologies, addressing key barriers to sustainable energy applications.
Aarimuthu et al. (Sun,) studied this question.