Production of mono- and bimetallic nanoparticles of noble metals by pyrolysis of organic extracts on silicon dioxide

International Conference on Functional Materials and Nanotechnologies 2013

材料科学;物理学

Serga, V.^1 ; Kulikova, L.^1 ; Cvetkov, A.^1 ; Krumina, A.^1 ; Kodols, M.^1 ; Chornaja, S.^2 ; Dubencovs, K.^2 ; Sproge, E.^2

Institute of Inorganic Chemistry, Riga Technical University, Latvia^1

Faculty of Material Science and Applied Chemistry, Riga Technical University, Latvia^2

关键词: Bimetallic composites;    Bimetallic nanoparticles;    Bimetallic particles;    Catalytic properties;    Glycerol oxidation;    Pyrolysis products;    Two-component mixtures;    Xrd phase analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/49/1/012015/pdf
DOI  :  10.1088/1757-899X/49/1/012015

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In the present work the influence of the tri-n-octylammonium (Oct3NH+) salt anion (PtCl62-, PdCl42-, AuCl4-) nature on the phase composition and mean size of crystallites of the extract pyrolysis products on the SiO2nanopowder has been studied. The XRD phase analysis of the composites (metal loading 2.4 wt.%) made under the same conditions, at the pyrolysis of Pt- and Au-containing extracts has shown the formation of nanoparticles of Pt (dPt15 nm) and Au (dAu33 nm), respectively. The end-product of the pyrolysis of the Pd-containing extract has an admixture phase of PdO along with the main metal phase (dPd21 nm). At the preparation of bimetallic particles (Pt-Pd, Pt-Au, Pd-Au) on the SiO2nanopowder it has been found that the nanoparticles of the PtPd alloy, Pt and Au or Pd and Au nanoparticles are the products of the thermal decomposition of two-component mixtures of extracts. The investigation of catalytic properties of the produced composites in the reaction of glycerol oxidation by molecular oxygen in alkaline aqueous solutions has shown that all bimetallic composites exhibit catalytic activity in contrast to monometallic ones.