Daş, Elif and Alkan Gürsel, Selmiye and Işıkel Şanlı, Lale and Bayrakçeken Yurtcan, Ayşe (2016) Comparison of two different catalyst preparation methods for graphene nanoplatelets supported platinum catalysts. International Journal of Hydrogen Energy, 41 (23). pp. 9755-9761. ISSN 0360-3199 (Print) 1879-3487 (Online)
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Official URL: http://dx.doi.org/10.1016/j.ijhydene.2016.01.111
Abstract
In this study, we compared two facile and effective approaches which are supercritical carbon dioxide (scCO2) deposition and microwave irradiation methods to synthesize Pt nanoparticles uniformly dispersed on graphene nanoplatelets (G) having 750 m2/g surface area as the support material. The prepared catalysts were characterized by using XRD, TGA, TEM, CV and PEM fuel cell performance tests. Microwave irradiation (Pt/G1) and scCO2 deposition (Pt/G2) methods resulted in the particle sizes of 3.1e3.4 nm and 1.5e1.6 nm, respectively. Higher electrochemically active surface area and PEM fuel cell performance were obtained for the Pt/G2 catalyst. An accelerated aging test, carbon corrosion, is also applied to the catalysts and Tafel slope losses were determined. Pt/G1 catalyst resulted in
50 mV Tafel slope loss whereas no significant loss was observed for Pt/G2 catalyst after carbon corrosion test.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PEM fuel cell; Platinum; Graphene; Microwave irradiation; Supercritical carbon dioxide deposition |
| Subjects: | T Technology > T Technology (General) Q Science > Q Science (General) Q Science > QD Chemistry > QD450-801 Physical and theoretical chemistry Q Science > QD Chemistry T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering and Natural Sciences > Basic Sciences > Chemistry Sabancı University Nanotechnology Research and Application Center Faculty of Engineering and Natural Sciences > Academic programs > Materials Science & Eng. Faculty of Engineering and Natural Sciences |
| Depositing User: | Selmiye Alkan Gürsel |
| Date Deposited: | 14 Jun 2016 11:34 |
| Last Modified: | 22 May 2019 13:38 |
| URI: | https://research.sabanciuniv.edu/id/eprint/29384 |
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Comparison of two different catalyst preparation methods for graphene nanoplatelets supported platinum catalysts. (deposited 09 Mar 2016 09:50)
- Comparison of two different catalyst preparation methods for graphene nanoplatelets supported platinum catalysts. (deposited 14 Jun 2016 11:34) [Currently Displayed]
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