Abstract
Calcination reduction reaction is used to prepare Pt/EB (emeraldine base)-XC72 (Vulcan carbon black) composites as the cathode material of a proton exchange membrane fuel cell (PEMFC). The EB-XC72 core-shell composite obtained from directly polymerizing aniline on XC72 particles is able to chelate and capture the Pt-ions before calcination. X-ray diffraction spectra demonstrate Pt particles are successfully obtained on the EB-XC72 when the calcined temperature is higher than 600 °C. Micrographs of TEM and SEM illustrate the affluent, Pt nanoparticles are uniformly distributed on EB-XC72 at 800 °C (Pt/EB-XC72/800). More Pt is deposited on Pt/EB-XC72 composite as temperatures are higher than 600 °C. The Pt/EB-XC72/800 catalyst demonstrates typical type of a cyclic voltammograms (C-V) curve of a Pt-catalyst with clear Pt–H oxidation and Pt–O reduction peaks. The highest number of transferred electrons during ORR approaches 3.88 for Pt/EB-XC72/800. The maximum power density of the single cell based on Pt/EB-XC72/800 reaches 550 mW cm−2.
Highlights
With purpose to curb the evolved greenhouse gas [1,2,3] produced from burning fossil fuels, the fuel cell has been globally researched in all fields [4].Lately studies pay attention on hydrogen-based proton exchange membrane fuel cells (PEMFCs) under the consideration of their water by-products and significant power generation with quiet and low-temperature operations
Other properties concerning about the gas fuel concentration flowing into the membrane electrode assembles (MEAs) play important roles on the functioning of the PEMFCs [6], which are related to catalyst, fuel, and binder boundaries
After covering the XC72 with EB-polyaniline (PANI), the diffraction peaks of the obtained Pt-catalysts became much broader when the calcined temperatures were below 800 ◦ C according to Figure 1b, indicating the crystallinity of the Pt-NPs loaded on the EB-XC72 was very low
Summary
With purpose to curb the evolved greenhouse gas [1,2,3] produced from burning fossil fuels, the fuel cell has been globally researched in all fields [4]. Studies pay attention on hydrogen-based proton exchange membrane fuel cells (PEMFCs) under the consideration of their water by-products and significant power generation with quiet and low-temperature operations. The main barrier to mass-producing PEMFCs is to prepare the fuel cell in a cheaper way through increasing the efficiency and durability of the loaded Pt-catalyst [5]. Past researches paying attentions on creating small pores on CB-supports to capture and disperse the reduced Pt [7]. Cathode-catalyst substrates made of CB cannot withstand the corrosion effect from the produced hydrogen peroxide and water after oxygen reduction reaction (ORR), resulting in the formation
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