Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 205, Issue -, Pages 64-71Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2017.10.074
Keywords
Core-shell nanocrystals; Trajenta; Reduced graphene oxide; Chromium (VI) reduction
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Funding
- National Natural Science Foundation of China [21475118]
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In this work, we developed a facile one-pot co-reduction method for fabrication of spherical porous Pt@ultra-thin Pd skin core-shell nanocrystals supported on N-doped reduced graphene oxide (Pt@Pd NCs/N-rGO). Trajenta (Tra), a kind of dipeptidyl peptidase-4 inhibitors for treatment of diabetes, served as a new structure-directing agent for Pt@Pd NCs and N-doping resource for rGO via pi-pi stacking interactions. The product was mainly characterized by microscopic analysis, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), thermogravimetry (TGA), Raman and Fourier transform infrared (FT-IR) spectroscopy, and the formation mechanism was discussed in some detail. By taking formic acid as the reductant, the Pt@Pd NCs/N-rGO nanocomposite showed significantly enhanced catalytic ability and improved repeatability for the reduction of highly toxic hexavalent chromium (Cr(VI)) compared with commercial Pt/C (20 wt%) and Pd/C (20 wt%). (C) 2017 Elsevier B.V. All rights reserved.
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