Synthesis of NiRu-Layered Double Hydroxide for Enhanced Oxygen Evolution Reaction

Argaw, Eden [North Carolina A&T State University, Greensboro, NC (United States)]; KC, Binod Raj [North Carolina A&T State University, Greensboro, NC (United States)]; Bastakoti, Bishnu Prasad [North Carolina A&T State University, Greensboro, NC (United States)] (ORCID:0000000246517393)

doi:10.1021/acsomega.5c12581

DOE OSTI · 3018622

Synthesis of NiRu-Layered Double Hydroxide for Enhanced Oxygen Evolution Reaction

Argaw, Eden [North Carolina A&T State University, Greensboro, NC (United States)]·KC, Binod Raj [North Carolina A&T State University, Greensboro, NC (United States)]·Bastakoti, Bishnu Prasad [North Carolina A&T State University, Greensboro, NC (United States)] (ORCID:0000000246517393)

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Abstract

Nickel−ruthenium layered double hydroxide (NiRu-LDH) was synthesized by coprecipitation using formamide as both solvent and intercalant. The synthesis was performed at various temperatures to study the impact of temperature on electrochemical performance. Temperature plays a vital role in optimizing LDH synthesis to enhance oxygen evolution reaction (OER) efficiency. The optimal temperature yielded a well-defined morphology with balanced crystallinity, leading to more active sites and improved charge transfer. Electrochemical tests indicated that the NiRu-LDH sample prepared at 50 °C (NiRu-LDH-50) required only 280 mV overpotential versus the reversible hydrogen electrode to achieve 10 mA/cm 2 and exhibited a low Tafel slope of 52 mV/dec, demonstrating excellent catalytic kinetics. This study presents the synthesis of NiRu-LDH via coprecipitation and emphasizes how reaction temperature influences LDH structural properties and OER performance.

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Argaw, Eden [North Carolina A&T State University, Greensboro, NC (United States)], KC, Binod Raj [North Carolina A&T State University, Greensboro, NC (United States)], Bastakoti, Bishnu Prasad [North Carolina A&T State University, Greensboro, NC (United States)] (ORCID:0000000246517393). 2026-01-31. Synthesis of NiRu-Layered Double Hydroxide for Enhanced Oxygen Evolution Reaction. https://doi.org/10.1021/acsomega.5c12581

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