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Comparison of two different catalyst preparation methods for graphene nanoplatelets supported platinum catalysts

Daş, Elif and Alkan Gürsel, Selmiye and Işıkel Şanlı, Lale and Yurtcan Bayrakçeken, Ayşe (2016) Comparison of two different catalyst preparation methods for graphene nanoplatelets supported platinum catalysts. International Journal of Hydrogen Energy . ISSN 0360-3199 (Print) 1879-3487 (Online) Published Online First http://dx.doi.org/10.1016/j.ijhydene.2016.01.111

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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 3.1–3.4 nm and 1.5–1.6 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
Subjects:Q Science > Q Science (General)
T Technology > TD Environmental technology. Sanitary engineering
Q Science > QD Chemistry
T Technology > T Technology (General) > T174.7 Nanotechnology
ID Code:29180
Deposited By:Lale Işıkel Şanlı
Deposited On:09 Mar 2016 09:50
Last Modified:14 Jun 2016 11:25

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