Electrochemical water splitting is one of the most promising and clean ways to produce hydrogen as a fuel. Herein, we present a facile and versatile strategy for synthesizing non-precious transition binary and ternary metal-based catalysts encapsulated in a graphitic carbon shell. NiMoC@C and NiFeMoC@C were prepared a simple sol-gel based method for application in the Oxygen Evolution Reaction (OER). The conductive carbon layer surrounding the metals was introduced to improve electron transport throughout the catalyst structure. This multifunctional structure showed synergistic effects, possess a larger number of active sites and enhanced electrochemical durability. Structural analysis indicated that the metallic phases were encapsulated in the graphitic shell. Experimental results demonstrated that the optimal core-shell material NiFeMoC@C exhibited the best catalytic performance for the OER in 0.5 M KOH, reaching a current density of 10 mA cm at low overpotential of 292 mV for the OER, superior to the benchmark IrO nanoparticles. The good performances and stability of these OER electrocatalysts, alongside an easily scalable procedure makes these systems ideal for industrial purposes.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10169681PMC
http://dx.doi.org/10.3389/fchem.2023.1162675DOI Listing

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