Oxygen-Evolution Reaction on Nickel Oxyhydroxide's Surface at Ultra-Low Overpotential

سال انتشار: 1403
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 86

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شناسه ملی سند علمی:

NICEC22_276

تاریخ نمایه سازی: 7 مرداد 1403

چکیده مقاله:

This study challenges the conventional understanding of nickel (hydr)oxides as inefficient catalysts forthe oxygen-evolution reaction (OER) under alkaline conditions. It is demonstrated that nickel oxyhydroxide,characterized by several methods, forms on Ni foam's surface, and exhibits OER activity at extremely lowpotential. This activity becomes particularly notable at the peak of Ni(II) oxidation to Ni(III), which follows chargeaccumulation. Remarkably, this mesoporous, super hydrophilic, and high-surface-area catalyst requires aminimal overpotential, as low as ۱۳۰ mV, with a current density of ۲۰۰ μA/cm۲, and displays a Tafel slope of۷۷.۹ mV/decade in alkaline media (۰.۱۰ M KOH).

نویسندگان

Mohammad Khateri

Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, ۴۵۱۳۷-۶۶۷۳۱, Zanjan, Iran.

Mohammad Mahdi Najafpour

Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, ۴۵۱۳۷-۶۶۷۳۱, Zanjan, Iran.Department of Chemistry, Sharif University of Technology, Tehran, Iran.