ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

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

E-mail: subq@mail.lzjtu.cn

Received: 31 May 2019  Accepted: 4 October 2019

Abstract:

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.

DOI: 10.1007/s11696-019-00955-y

Chemical Papers 74 (4) 1189–1197 (2020)