carbon supports for mnc catalysts
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Carbon Supports for MNC Catalysts. Nate Leonard. Introduction. Porosity. Pore Size Distribution of various carbon precursors and the associated catalysts modeled from DFT calculations based on nitrogen adsorption at 77K. RRDE Study. - PowerPoint PPT PresentationTRANSCRIPT
Carbon Supports for MNC CatalystsNate Leonard
Introduction
Porosity
Pore Size Distribution of various carbon precursors and the associated catalysts modeled from DFT calculations based on nitrogen adsorption at 77K.
RRDE Study
RRDE polarization curves plotted along with percent peroxide generation. Experimental conditions: 0.5M H2SO4, 1200 rpm, catalyst loading 0.5 mg/cm2 on glass carbon electrode.
Tafel Analysis
Tafel plot of four different catalysts. Experimental conditions: 0.5M H2SO4, 1200 rpm, catalyst loading 0.5 mg/cm2 on glass carbon electrode.
Porosity
Relationship between mesoporous area of four different catalysts and two different parameters: nitrogen content and iR-free activity at 0.8 V vs. RHE.
Conclusions carbon mesoporosity can impact
nitrogen adsorption electrochemical activity. • substrates that can adsorb the most nitrogen
show the highest activity. • transport of precursors important to potential
active sites. • mesoporosity increases, both nitrogen
adsorption and activity increase. Therefore activity maybe tied to both mesoporous transport and surface chemistry.