1 / 7

Carbon Supports for MNC Catalysts

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.

nat
Download Presentation

Carbon Supports for MNC Catalysts

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Carbon Supports for MNC Catalysts Nate Leonard

  2. Introduction

  3. Porosity Pore Size Distribution of various carbon precursors and the associated catalysts modeled from DFT calculations based on nitrogen adsorption at 77K.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

More Related