Synthesis of Pd/Pt core/shell nanostructures with truncated-octahedral morphology toward formic acid oxidation
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In this study, a simple one-pot method was adopted to synthetize Pd/Pt core/shell nanostructures with truncated-octahedral morphology. The morphology of the obtained Pd/Pt nanoparticles was characterized by transmission electron microscopy (TEM) and high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM). In addition, the composition was determined by energy-dispersive X-ray spectroscopy (EDS) and inductively coupled plasma atomic emission spectroscopy (ICP-AES), and the electric structures were studied by powder X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Based on the above results, it could be noticed that Pd/Pt core/shell nanostructures with truncated-octahedral morphology were produced, where the core consisted of Pd atoms and the shell consisted of Pt atoms. In order to test the catalytic properties of the prepared Pd/Pt nanoparticles, cyclic voltammetry (CV) was carried out in 0.5 M H2SO4 and 0.5 M H2SO4 + 1 M HCOOH. Compared with commercial Pt black, the Pd/Pt core/shell nanostructures with truncated-octahedral morphology exhibited higher activity and stability toward formic acid oxidation.
KeywordsCore/shell Pd/Pt nanocrystals Electrocatalysis Formic acid oxidation
This study was funded by the National Natural Science Foundation of China (51401074, 21603052, and 51272064), the Key Basic Research Program of Hebei Province of China (17964401D), and the Natural Science Foundation of Hebei Province (B2015202305).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Goswami A, Rathi AK, Aparicio C, Tomanec O, Petr M, Pocklanova R, Gawande MB, Varma RS, Zboril R (2017) In-situ generation of Pd-Pt Core-shell nanoparticles on reduced graphene oxide (Pd@Pt/rGO) using microwaves: applications in dehalogenation reactions and reduction of olefins. ACS Appl Mater Interfaces 9:2815–2824. https://doi.org/10.1021/acsami.6b13138 CrossRefGoogle Scholar
- Long NV, Ohtaki M, Nogami M, Hien TD (2011b) Effects of heat treatment and poly(vinylpyrrolidone) (PVP) polymer on electrocatalytic activity of polyhedral Pt nanoparticles towards their methanol oxidation. Colloid Polym Sci 289:1373–1386. https://doi.org/10.1007/s00396-011-2460-6 CrossRefGoogle Scholar
- Poon KC, Tan DC, Vo TD, Khezri B, Su HB, Webster RD, Sato H (2014) Newly developed stepwise Electroless deposition enables a remarkably facile synthesis of highly active and stable amorphous Pd nanoparticle Electrocatalysts for oxygen reduction reaction. J Am Chem Soc 136:5217–5220. https://doi.org/10.1021/ja500275r CrossRefGoogle Scholar