ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
In situ synthesis of surfactant-free Pt nanoparticles supported on multi-walled carbon nanotubes under visible light
Yinxia Feng, Biquan Su, Liang Xian, Yongjun Ma, Li Sheng, and Ningjing Cao
College of Chemistry and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, China
Received: 31 May 2019 Accepted: 4 October 2019
This paper presents the visible light-assisted synthesis of surfactant-free Pt nanoparticles (Pt-NPs) supported on multi-walled carbon nanotubes (MWCNTs) at ambient condition. Transmission electron microscopy (TEM) images indicate that Pt-NPs with high density and relative small in size (about 2 nm) were monodispersed on the surface of MWCNTs. The characterizations of Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), X-ray diffractometer (XRD) and ultraviolet–visible spectroscopy (UV–Vis) prove that visible light irradiation significantly affect the species distribution of [PtCl4]2− precursor in the hydrolysis and then promote hydrolysate Pt oxides loading on MWCNTs. The loading process decides the morphology of Pt-NPs rather than the following precursor reduction, which does not change the morphology but only the valance state of platinum. The catalytic activity of Pt/MWCNTs was tested in subsequent methanol electrochemical reactions and 4-nitrophenol (4-NP) reduction.
Keywords: Pt nanoparticles; Multi-walled carbon nanotubes; Visible light; Catalysis
Full paper is available at www.springerlink.com.
Chemical Papers 74 (4) 1189–1197 (2020)