Acta Phys. -Chim. Sin. ›› 2008, Vol. 24 ›› Issue (02): 345-349.doi: 10.3866/PKU.WHXB20080228

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In-situ SERS of Formic Acid Electro-catalytic Oxidation on Aucore@Ptshell/Pt Electrode

RAO Gui-Shi; FAN Feng-Ru; WANG Guo-Fu; WU Zhi-Xiang; YI Fei; ZHONG Qi-Ling; REN Bin; TIAN Zhong-Qun   

  1. College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China; State Key Laboratory for Physical Chemistry of Solid Surfaces and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China
  • Received:2007-09-25 Revised:2007-11-13 Published:2008-01-26
  • Contact: ZHONG Qi-Ling E-mail:zhqiling@163.com

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Abstract: Aucore@Ptshell nanoparticleswere synthesizedby chemical reductionmethod. The sampleswere characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). In-situ surfac-enhanced Raman scattering (in-situ SERS) spectroscopy combined with cyclic voltammetry was utilized to investigate the electro-oxidation behavior of formic acid adsorbed on Aucore@Ptshell nanoparticles coated on platinum electrode, and SERS spectra with high quality were acquired. Results showed that the intermediates COad and HCOOad, the dissociated products of HCOOH, were produced at open circuit potential. As the potential moved to positive, the first oxidation wave for CO2 was observed at +0.10 V. The study demonstrated that the electrode prepared by Aucore@Ptshell nanoparticles coated on platinum substrate exhibited good electro-catalytic properties and SERS activity for the oxidation of HCOOH, and the electro-oxidation proceeds of formic acid via“dual path”mechanism.

Key words: SERS, Formic acid, Electro-catalytic oxidation, Aucore@Ptshell/Pt electrode