Details

Autor(en) / Beteiligte

• Zhao, Lei
• Wang, Zhen-Bo
• Li, Jia-Long
• Zhang, Jing-Jia
• Sui, Xu-Lei
• Zhang, Li-Mei

Titel

Hybrid of carbon-supported Pt nanoparticles and three dimensional graphene aerogel as high stable electrocatalyst for methanol electrooxidation

Ist Teil von

• Electrochimica acta, 2016-01, Vol.189, p.175-183

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Three-dimensional structured Pt/C/graphene aerogel hybrids demonstrate high stability towards methanol electrooxidation due to the unique 3D graphene structure as well as the efficient assembly between the Pt/C and graphene aerogel. [Display omitted] •Pt/C/graphene aerogel (GA) hybrid catalyst synthesized via a facile hydrothermal process.•Pt/C/GA possesses a well-defined 3D graphene framework with encapsulating of Pt/C catalyst.•Pt/C/GA catalyst exhibits remarkably higher stability than standard Pt/C catalyst.•This simple method can be widely applied in fabrication of high durable supported catalysts. Three-dimensional (3D) structured Pt/C/graphene aerogel (Pt/C/GA) hybrid as a remarkable high stability electrocatalyst is synthesized through a facile and green hydrothermal process. Thanks to the unique 3D graphene framework structure, Pt/C/GA hybrid catalyst demonstrated enhanced stability towards methanol electrooxidation with no decrease of electrocatalytic activity. Besides, Pt/C/GA hybrid catalyst also exhibits a significantly enhanced stability to scavenge crossover methanol under the high potential in acid solution compared with the standard Pt/C catalyst: Pt/C catalyst lost nearly 40% of its initial activity after 1000 cyclic voltammetry cycles, by contrast, only 16% for Pt/C/GA. Moreover, it is noteworthy that after 200 cycles, the mass activity of Pt/C/GA is always much higher than that of Pt/C. A significant stability enhancement is achieved due to the unique 3D macroporous graphene structure as well as the efficient assembly between the Pt/C catalyst and graphene aerogel. Importantly, our synthetic strategy can be easily applied to the commercial PtRu/C catalyst to improve its durability. This simple, convenient and green synthetic method highlights the potential in fabrication of high durable electrocatalyst for fuel cell applications.