Comparison of two different catalyst preparation methods for graphene nanoplatelets supported platinum catalysts. (22nd June 2016)

• Record Type: Journal Article
• Authors: Daş, Elif; Alkan Gürsel, Selmiye; Işikel Şanli, Lale; Bayrakçeken Yurtcan, Ayşe
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 23(2016)
• Page Start: 9755
• Page End: 9761
• Publication Date: 2016-06-22
• Subjects: PEM fuel cell -- Platinum -- Graphene -- Microwave irradiation -- Supercritical carbon dioxide deposition; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.01.111
• Languages: English
• ISSNs: 0360-3199

Abstract

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 m 2 /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. Highlights: Graphene nanoplatelet supported Pt nanoparticles synthesized via two methods. Microwave irradiation method is used. Supercritical carbon dioxide deposition (scCO2 ) method is used. ScCO2 method gave better structured catalysts with high PEMFC performance.