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- W2995278045 abstract "A series of Pt/C catalysts for proton exchange membrane fuel cells (PEMFCs) with various metal loadings is synthesized by a microwave-assisted polyol process via mixing an extremely stable platinum colloid (> 3 months’ shelf life) from single batch preparation with activated carbon ethylene glycol suspension. 21 wt%, 42 wt% and 61 wt% Pt loadings are employed to showcase the advantages of the improved polyol process. The ultraviolet (UV)–visible spectra and ζ-potential measurements are conducted to monitor the wet chemistry process during catalyst preparation. The powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and thermogravimetric analysis (TGA) characterizations are carried out on catalysts. The catalyst activities are investigated using electrochemical and single cell tests. The stability of Pt nanoparticle colloid is explored by ORR, cyclic voltammetry (CV) and ζ-potential measurements. The TEM results show the Pt particle sizes of the colloid, and the sizes of the 21 wt%, 42 wt% and 61 wt% Pt/C samples are 2.1–3.9 nm. Because of the high Pt dispersion, the Pt/C catalysts exhibit superior electroactivity toward ORR. In addition, four 61 wt% Pt/C catalysts made from the Pt colloid with 0–3 months’ shelf life show almost the same performance, which exhibits superior stability of the Pt colloid system without surfactant protection." @default.
- W2995278045 created "2019-12-26" @default.
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- W2995278045 date "2020-08-01" @default.
- W2995278045 modified "2023-10-15" @default.
- W2995278045 title "Rapid synthesis of highly active Pt/C catalysts with various metal loadings from single batch platinum colloid" @default.
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- W2995278045 doi "https://doi.org/10.1016/j.jechem.2019.12.004" @default.
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