Synthesis of Ultrafine Platinum Nanocatalysts by Ice‐photochemical Method and Their Application in Catalytic Degradation of 4‐nitrophenol

Abstract

Here, uniformly dispersed ultrafine platinum nanocatalysts (Pt/ C 60 ) were synthesized on C 60 by ice-photochemical method using potassium chloroplatinate (K 2 [PtCl 4 ]) as platinum source under the condition of low temperature, no stabilizer and reducing agent. X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and Transmission electron microscopy (TEM) were used to study the composition and morphology of Pt/C 60 catalyst. It was confirmed that Pt Ultra-small Particles (Pt UPs) was loaded on C 60 surface with high dispersion. The average particle sizes of the three samples obtained under different reaction conditions were 1.41 � 0.1 nm, 1.54 � 0.4 nm and 1.73 � 0.3 nm, respectively. The results show that the light-induced effect and the ice lattice domain limiting effect in the frozen state effectively control the formation and growth of platinum clusters in the process of Pt 2 + reduction to Pt 0 . The rate constants of the three samples were 0.89 min À 1 , 0.31 min À 1 , 0.19 min À 1 , respectively, showing high catalytic activity in the study of the catalytic performance of Pt/C 60 degradation of 4nitrophenol (4-NP) by Ultraviolet-visible spectroscopy (UV-Vis). This method provides a meaningful attempt for the study of green chemical synthesis method of platinum metal catalysts.