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Iron Modified Graphitized Carbon Aerogels for Sustainable Energy Applications

Published online by Cambridge University Press:  23 January 2013

Praveen Kolla ,
Kimberly Kerce ,
Yong Zhao ,
Joseph Houk ,
Yahaya Normah ,
Wendell Rhine  and
Alevtina Smirnova
Praveen Kolla
Affiliation:
Material Engineering Science, South Dakota School of Mines and Technology, Rapid City, SD 57701
Kimberly Kerce
Affiliation:
Chemistry and Applied Biological Sciences, South Dakota School of Mines and Technology, Rapid City, SD 57701
Yong Zhao
Affiliation:
Chemistry and Applied Biological Sciences, South Dakota School of Mines and Technology, Rapid City, SD 57701
Joseph Houk
Affiliation:
Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701
Yahaya Normah
Affiliation:
Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701
Wendell Rhine
Affiliation:
Aspen Aerogel Inc., Northborough, MA 01532, USA
Alevtina Smirnova
Affiliation:
Chemistry and Applied Biological Sciences, South Dakota School of Mines and Technology, Rapid City, SD 57701
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Abstract

Mesoporous carbon aerogel has been impregnated with iron (10 and 15 wt. %) as a catalyst for graphitization by wet incipient method. The iron modified and non-modified carbon aerogels were heat treated at 900°C, 1200°C, and 1400°C in argon. The crystal structure, morphology, and electro catalytic activity of the resulting nano-composites have been studied. It was found that, the degree of graphitization was proportional to the concentration of Iron phase and the ratio of iron to iron nitride phase in the heat-treated samples. In carbon aerogel sample sintered at 1200°C with 15 wt. % of iron phase, mesoporosity in the range of 3-4 nm and microporosity (< 2nm) was significantly improved by graphitization without affecting the Carbon Aerogels mesoporosity in 10-30 nm range. In this case of 15 wt. % iron doped samples, HRTEM analysis confirms the presence of uniformly distributed ∼43.5nm iron nanoparticles surrounded by graphene layers. Correspondingly, improved graphitization and presence of iron nitride resulted in 3.65 electron assisted oxygen reduction reaction.

Keywords

aerogelcatalyticnanostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1491: Symposium C – Electrocatalysis and Interfacial Electrochemistry for Energy Conversion and Storage , 2013 , mrsf12-1491-c10-02
Copyright
Copyright © Materials Research Society 2013

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