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Metals and Materials International

, Volume 23, Issue 3, pp 603–609 | Cite as

Enhanced hydrogen evolution properties obtained by ultrasonic-cyclic voltammetry modification of C-supported PtCu thin film catalyst

  • Sha Yi
  • Bin Yang
  • Zhan-Sheng Zhang
Article
  • 63 Downloads

Abstract

Carbon-supported Pt-Cu (Pt-Cu/C) bimetallic catalyst was synthesized by Ion Beam Sputtering technology and subsequently annealed in vacuum and electrochemically etched by Ultrasonic-Cyclic Voltammetry (US-CV). Electrochemical measurements indicate that the sample was modified electrochemically by US-CV shows higher catalytic activity towards hydrogen evolution reaction than pure Pt/C. Scanning and transmission electron microscopy and electronic differential system analysis reveal that the surface of post-processed catalyst produced PtCu@Pt core-shell structure which increasing the efficiency of Pt. Transmission electron microscope analysis displays that on the surface of PtCu@Pt core-shell particles detects lattice compressive strain, the lattice compression variable is around 1.12%. X-ray photoelectron spectroscopy analysis confirms that the Pt4f7/2 binding energy of the post-processed PtCu/C is 71.10 eV, decreased by 0.2 eV compared to pure Pt/C (71.3 eV). It can be inferred that the enhancement of catalytic property attribute to the Cu atoms modified the geometric structure and electronic structure of the Pt atoms.

Keywords

thin films ion-beam processing surface modification electrochemistry hydrogen evolution 

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Copyright information

© The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht 2017

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringKunming University of Science and TechnologyKunmingP. R. China

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