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A Unified Platform Based on Nanoalloyed FeCoNi Sulfide as Electrocatalyst for OER; UOR; and MOR
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DOI：10.1021/acsanm.6c01252.png)
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Abstract
En 中文
The oxygen evolution reaction (OER) remains a major bottleneck in electrochemical water splitting due to its sluggish kinetics and high overpotential. Replacing the OER with thermodynamically more favorable oxidation reactions, such as the urea oxidation reaction (UOR) and methanol oxidation reaction (MOR), offers a promising strategy to reduce energy consumption while enabling value-added chemical production or wastewater treatment. In this work, a hydrangea-like trimetallic FeCoNi nanoalloy grown on nickel foam (FeCoNi/NF) and its nanosulfide (S–FeCoNi/NF) are developed as a unified electrocatalytic platform for OER, UOR, and MOR. The S–FeCoNi/NF electrode exhibits significantly enhanced performance, achieving an overpotential of 196 mV for OER and low operating potentials of 1.348 and 1.325 V for UOR and MOR, respectively, at 10 mA cm–2, surpassing the undoped FeCoNi/NF, outperforming most of the reported electrocatalysts. Experimental results reveal that sulfur doping effectively modulates the electronic structure, increases active site availability, and accelerates the reaction kinetics. This work highlights the potential of ternary transition metal sulfides as multifunctional electrocatalysts for energy-saving hydrogen production coupled to organic oxidation.
Keywords:
Alcohols
Oxidation
Radiology
Sulfur
Urea
transition metal sulfides
S-doping
oxygen evolution reaction
urea oxidation reaction
methanol oxidation reaction