Paunovic, Perica and Dimitrov, Aleksandar and Popovski, Orce (2009) Effect of activation/purification of multiwalled carbon nanotubes (MWCNTs)on the activity of non-platinum based hypo-hyper d-electrocatalysts for hydrogen evolution. Materials Research Bulletin, 44 (9). pp. 1816-1821.
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Abstract
Commercial multiwalled carbon nanotubes (MWCNTs) were used as a catalyst support for non-platinum
hypo-hyper d-electrocatalysts. In order to improve the performance of these catalysts, activation/
purification of MWCNTs in acid medium (HNO3) was carried out. The physical and surface changes of
MWCNTs were investigated by DTA/TGA analysis, Raman spectroscopy, and cyclic voltammetry.
Structural changes of the electrocatalysts were observed by infrared spectroscopy and SEM. Their use as
a support for electrocatalysts for hydrogen evolution was demonstrated, and shown to be more suitable
compared to the traditional carbon support material � carbon black (Vulcan XC-72). The electrocatalysts consisted of 10% Co + 18% TiO2 + MWCNTs. Activation/purification removes the amorphous carbon phase in theMWCNTs. As a result of both shortening and opening of carbon nanotubes, better dispersion of metallic particles (the active catalytic centers) was achieved. Thus, trans-particle and inter-particle porosity of the electrocatalytic material was improved, implying increase of catalytic activity for
hydrogen evolution.
| Item Type: | Article |
|---|---|
| Subjects: | Engineering and Technology > Materials engineering |
| Divisions: | Military Academy |
| Depositing User: | Orce Popovski |
| Date Deposited: | 22 Jan 2013 08:55 |
| Last Modified: | 22 Jan 2013 08:55 |
| URI: | https://eprints.ugd.edu.mk/id/eprint/4756 |
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