Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11011593 | International Journal of Hydrogen Energy | 2018 | 13 Pages |
Abstract
In this study, it was aimed to synthesize catalytically active, high surface area carbon nanotubes (CNTs) by means of nitrogen doping (N-doping). The synthesized nitrogen doped carbon nanotubes (N-CNTs) were used as Pt catalyst support in order to improve oxygen reduction reaction (ORR) kinetics at the cathode electrode in PEM fuel cell. Polypyrrole (PPy) was served as both carbon and nitrogen source and FeCl3 solution was used as oxidizing agent in the synthesis procedure of N-CNTs. Chemical activation of the materials was made with potassium hydroxide (KOH) solution during 12 and 18Â h time periods. It was considered that activation period is of great importance on the properties of the synthesized PPy based N-CNTs. 12Â h activated N-CNTs gave higher surface area (1607.2Â m2/g) and smaller micropore volume (0.355Â cm3/g) in comparison to 18Â h activated N-CNTs having smaller surface area (1170.7Â m2/g) and higher micropore volume (0.383Â cm3/g). PEM fuel cell performance results showed that 12Â h activated N-CNTs are better catalyst supports than 18Â h activated N-CNTs for Pt nanoparticle decoration.
Related Topics
Physical Sciences and Engineering
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Authors
AyÅenur Ãztürk, AyÅe Bayrakçeken Yurtcan,