nate leonard. pore size distribution of various carbon precursors and the associated catalysts...
Post on 19-Dec-2015
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![Page 1: Nate Leonard. Pore Size Distribution of various carbon precursors and the associated catalysts modeled from DFT calculations based on nitrogen adsorption](https://reader036.vdocuments.us/reader036/viewer/2022062516/56649d2e5503460f94a06341/html5/thumbnails/1.jpg)
Carbon Supports for MNC CatalystsNate Leonard
![Page 2: Nate Leonard. Pore Size Distribution of various carbon precursors and the associated catalysts modeled from DFT calculations based on nitrogen adsorption](https://reader036.vdocuments.us/reader036/viewer/2022062516/56649d2e5503460f94a06341/html5/thumbnails/2.jpg)
Introduction
![Page 3: Nate Leonard. Pore Size Distribution of various carbon precursors and the associated catalysts modeled from DFT calculations based on nitrogen adsorption](https://reader036.vdocuments.us/reader036/viewer/2022062516/56649d2e5503460f94a06341/html5/thumbnails/3.jpg)
Porosity
Pore Size Distribution of various carbon precursors and the associated catalysts modeled from DFT calculations based on nitrogen adsorption at 77K.
![Page 4: Nate Leonard. Pore Size Distribution of various carbon precursors and the associated catalysts modeled from DFT calculations based on nitrogen adsorption](https://reader036.vdocuments.us/reader036/viewer/2022062516/56649d2e5503460f94a06341/html5/thumbnails/4.jpg)
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.
![Page 5: Nate Leonard. Pore Size Distribution of various carbon precursors and the associated catalysts modeled from DFT calculations based on nitrogen adsorption](https://reader036.vdocuments.us/reader036/viewer/2022062516/56649d2e5503460f94a06341/html5/thumbnails/5.jpg)
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.
![Page 6: Nate Leonard. Pore Size Distribution of various carbon precursors and the associated catalysts modeled from DFT calculations based on nitrogen adsorption](https://reader036.vdocuments.us/reader036/viewer/2022062516/56649d2e5503460f94a06341/html5/thumbnails/6.jpg)
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.
![Page 7: Nate Leonard. Pore Size Distribution of various carbon precursors and the associated catalysts modeled from DFT calculations based on nitrogen adsorption](https://reader036.vdocuments.us/reader036/viewer/2022062516/56649d2e5503460f94a06341/html5/thumbnails/7.jpg)
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.