Ni-Co-Se nanoparticles modified reduced graphene oxide nanoflakes, anadvance electrocatalyst for highly efficient hydrogen evolution reaction
محل انتشار: دوازدهمین سمینار سالانه الکتروشیمی ایران
سال انتشار: 1395
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 226
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شناسه ملی سند علمی:
ELECTROCHEMISTRY012_150
تاریخ نمایه سازی: 5 آذر 1397
چکیده مقاله:
The present manuscript reports a simple one-step wet chemical approach to synthesis reducedgraphene oxide nanoflakes (RGONF) from graphite by a thermal reduction at low temperature.The optical, Fourier Transform Infrared, X-ray diffraction, Raman, X-ray photoelectronspectroscopy, electrochemical impedance spectroscopy and transmission electron microscopy areused to demonstrate the synthesis RGONF. This method is simple and avoids the usage ofharmful chemical reductants. Then, Ni-Co-Se nanoparticles were solvothermal deposited onRGONF in aqueous media (RGONF/Ni-Co-Se) with an average size of 80 nm. Then, a glassycarbon electrode (GCE) was modified with RGONF/Ni-Co-Se and is used as an electrocatalystfor hydrogen evolution reaction (HER) in 0.50 mol L-1 sulfuric acid. The results showed anexcellent catalytic activity of RGONF/Ni-Co-Se with an overpotential of 5 mV (vs. RHE) toachieve high current densities of 600 mA.cm-2 (at -780.0 mV). As well, the applied overpotentialand slope for HER is better than expensive Pt/C (20%) catalyst, which used in fuel cells[1]. Also,the Tafel slope was about 30±3 mV decade-1 and suggested the Tafel mechanism for HER..
کلیدواژه ها:
Reduced graphene oxide nanoflakes ، Thermal reduction ، Ni-Co-Se nanoparticles ، Solvothermal deposition ، Hydrogen evolution reaction
نویسندگان
Ahmad Reza Taghipour Jahromi
Department of Chemistry, Isfahan University of Technology, Isfahan, Iran
Behzad Rezaei
Department of Chemistry, Isfahan University of Technology, Isfahan, Iran