Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 771, Issue -, Pages 477-488Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.08.303
Keywords
Pt-Pd; rGO; PANI; Electrooxidation; DMFC
Categories
Funding
- Korea Institute of Energy Technology Evaluation and Planning (KETEP)
- Ministry of Trade, Industry and Energy (MOTIE) of the Republic of Korea [20184030202210]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2017R1A2B4005230]
- National Research Foundation of Korea [2017R1A2B4005230] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this article, we report a wet reflux strategy for the synthesis of reduced graphene oxide (rGO)/polyaniline (PANI)/Pt-Pd composite, which was exploited as a potential anode catalyst with enhanced methanol oxidation capacity for direct methanol fuel cells (DMFCs). The construction of rGO/PANI/Pt-Pd involves two steps such as synthesis of PANI on GO and in-situ reduction of GO and metal precursors. The spherical shaped Pt-Pd particles with the average size of 3.5 nm are scattered throughout the surface of rGO/PANI, as observed from transmission electron microscope (TEM). PANI tailors the surface of rGO to allow the uniform scattering of Pt-Pd, which is beneficial for adsorption and decomposition of methanol. Besides, PANI generates strong interaction with Pt-Pd through nitride bond, thereby enhances the durability of composite. The cumulative features of rGO/PANI/Pt-Pd include active carbon support, extended architecture of electron conducting channels and number of methanol oxidation centers endows excellent DMFC power density of 117.45 mW/cm(2) and concrete cell durability over 70 h. Therefore, the proposed rGO/PANI/Pt-Pd can be used to address various critical issues associated with commercial Pt/C catalyst. (C) 2018 Elsevier B.V. All rights reserved.
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