Au_(core)Pt_(shell)nanoparticles with different thicknesses were prepared by using chemical reduction method,and characterized by ultraviolet-visible spectroscopy(UV-Vis),transmission electron microscopy(TEM) and cyclic voltammetry(CV).The electrocatalytic activity of Au_(core)Pt_(shell)nanoparticles with the mean diameter of 70~80 nm to methanol oxidation was investigated by cyclic voltammetry in the acid solution.The results revealed that the prepared core-shell nanoparticles were covered by Pt shell and exhibited the similar optical property and electrocatalytic activity with the normal Pt surface.Moreover,the electrocatalytic activity increased with the electrochemical sweep in the certain potential range.It might be contributed by the special loose structure of Pt shell rather than the increase of the real area.


Au_(core)Pt_(shell)nanoparticles, Methanol, Electrocatalysis

Publication Date


Online Available Date


Revised Date


Received Date



[1]Golab i S M,Nozad A.E lectrocatalytic oxidation ofm eth-anol on electrodes mod ified by p latinum m icropartic lesd ispersed into poly(o-phenylened iam ine)film[J].J.E lectroanal Chem.,2002,521:161.
[2]M ikhaylova A A,Khazova O A.E lectrocatalytic and ad-sorption properties of p latinum m icropartic les electrode-posited onto glassy carbon and into Nafion film s[J].J.E lectroanal.Chem.,2000,480:225.
[3]Chen C W,Takezako T,Yam amoto K.Poly(N-vinyli-sobutyram ide)-stab ilized p latinum nanopartic les:syn-thesis and temperature-responsive behavior in aqueoussolution[J].Colloids and Surfaces A,2000,169:107.
[4]Hengle in A.Preparation and optical absorption spectraof Au/sub core/Pt/sub shell/and Pt/sub core/Au/subshell/colloidal nanopartic les in aqueous solution Phys[J].J.Chem.B,2000,104:2201.
[5]Lu L H,W ang H S,X i S Q,et al.Improved size con-trol of large pallad ium nanopartic les by a seed ing growthm ethod Journal of M aterials Chem istry[J].J.M ater.Chem.,2002,12:156.
[6]Sronova Sloufova L,Ledn icky F,Gemperle A.Core-Shell(Ag)Au b im etallic nanopartic les:analysis ofTransm ission electron m icroscopy Im ages[J].Lang-mu ir,2000,16:9928.
[7]Lu Lehu i,Sun Guoying,Zhang Hongjie.Fabrication ofcore-shell Au-Pt nanopartic le film and its potential ap-p lication as catalysis and SERS substrate[J].J.M ater.Chem.,2004,14:1005.
[8]Lu Lehu i,W ang Haishu i,X i Sh iquan,et al.Improvedsize control of large pallad ium nanopartic les by a seed inggrowth m ethod Journal of M aterials Chem istry[J].J.M ater.Chem.2002,12:156.
[9]Tian Na(田娜),ChenW e i(陈卫),Sun Sh i-Gang(孙世刚).Spectroscop ic characterization and electrocatalyticproperties of core-shell Au-Pt nanopartic les[J].ActaPhys.-ch im.S in.,2005,21:74.
[10]L i Jian-Feng(李剑锋),Hu Jia-W en(胡家文),RenB in(任斌),et al.Tun ing the SERS activity of Au-PdCore-shellNanopartic les by controlling the th ick iness ofthe Pd shell[J].Acta Phys.-Ch im.S in ica,2005,21:825.
[11]Frens G.Controlled nuc leation for the regu lation of thepartic le size in monod isperse gold suspensions[J].Nature,1973,241:20.
[12]Cre ighton J A,Eadon D G.U ltraviolet-visib le absorp-tion spectra of the colloidal m etallic elem ents[J].J.Chem.Soc.,Faraday Trans.,1991,87:3881.
[13]Teran ish i T,HosoeM,Tanaka T,et al.S ize control ofmonod ispersed Pt nanopartic lesand the ir 2D or gan iza-tion by electrophoretic deposition[J].J.Phys,Chem.B,1999,103:3818.
[14]Engelsm ann K,Lorenz W J,Schm idt E.Underpoten-tial deposition of lead on polycrystalline and single-crystal gold surface 1.Thermodynam ica[J].J.E lec-troanal.Chem.,1980,114:1. [15〗Ren B,L i X Q,She C X.Surface Ram an spectroscopyas a versatile techn ique to study m ethanol oxidation onrough Pt electrodes[J].E lectroch im.Acta,2000,46:193. [16〗B iswas P C,Nodasaka Y,EnyoM,et al.E lectro-oxi-dation of CO and m ethanol on graph ite-based p latinumelectrodes comb ined w ith oxide-supported u ltrafine goldpartic les[J].J.E lectroanal.Chem,1995,381:167.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.