Presentation Title

Controlled Synthesis of Electrocatalytic Co3O4 Nanofibers via Electrospinning

Start Date

November 2016

End Date

November 2016

Location

HUB 268

Type of Presentation

Oral Talk

Abstract

Keywords: electrocatalysis, nanofiber, electrospinning, energy production

The oxygen evolution reaction (OER) is the kinetic bottleneck towards efficient H2 production from photoelectrolysis and water electrolysis. With efficient hydrogen production it is possible to move our current energy source towards renewable energy production and efficient energy storage. Though noble metal oxides, such as RuO2, IrO2, and PtO2, provide good performance, they are much more expensive than the abundant earth metals such as cobalt. The spinel form of the Co metal oxide, Co3O4 has been explored for OER in alkaline solution in prior works for its high reactivity. Since catalytic performance is directly related to surface area of the catalyst, electrospinning has been utilized to synthesize Co3O4 nanofibers. Through the utilization of electrospinning and thermal techniques, it is possible to synthesize crystalline nanofibers with high surface area and greatly decrease the manufacturing cost of alkaline based electrocatalysts. Modifications to the annealing time and temperature can be used to greatly increase the crystallinity, and control the fiber diameter. Decreasing the diameter of the nanofibers will lead to larger surface area, and a higher edge site count for catalytic activities to occur. Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), and X-ray powder diffraction (XRD) were all used to characterize the diameter, morphology, composition, crystal structure, and grain size of the nanofibers, giving a uniform post-annealed average diameter with no defects of 35nm.

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Nov 12th, 2:00 PM Nov 12th, 2:15 PM

Controlled Synthesis of Electrocatalytic Co3O4 Nanofibers via Electrospinning

HUB 268

Keywords: electrocatalysis, nanofiber, electrospinning, energy production

The oxygen evolution reaction (OER) is the kinetic bottleneck towards efficient H2 production from photoelectrolysis and water electrolysis. With efficient hydrogen production it is possible to move our current energy source towards renewable energy production and efficient energy storage. Though noble metal oxides, such as RuO2, IrO2, and PtO2, provide good performance, they are much more expensive than the abundant earth metals such as cobalt. The spinel form of the Co metal oxide, Co3O4 has been explored for OER in alkaline solution in prior works for its high reactivity. Since catalytic performance is directly related to surface area of the catalyst, electrospinning has been utilized to synthesize Co3O4 nanofibers. Through the utilization of electrospinning and thermal techniques, it is possible to synthesize crystalline nanofibers with high surface area and greatly decrease the manufacturing cost of alkaline based electrocatalysts. Modifications to the annealing time and temperature can be used to greatly increase the crystallinity, and control the fiber diameter. Decreasing the diameter of the nanofibers will lead to larger surface area, and a higher edge site count for catalytic activities to occur. Scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDX), and X-ray powder diffraction (XRD) were all used to characterize the diameter, morphology, composition, crystal structure, and grain size of the nanofibers, giving a uniform post-annealed average diameter with no defects of 35nm.