Mitrofanovite, Layered Platinum Telluride, for Active Hydrogen Evolution

Dongyeon Bae, Karam Park, Hagyeong Kwon, Dongyeun Won, Ning Ling, Hionsuck Baik, Jayoon Yang, Hee Jung Park, Jiung Cho, Heejun Yang, Sukmin Jeong, Suyeon Cho

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Two-dimensional (2D) layered catalysts have been considered as a class of ideal catalysts for hydrogen evolution reaction (HER) because of their abundant active sites with almost zero Gibbs energy change for hydrogen adsorption. Despite the promising performance, the design of stable and economic electrochemical catalyst based on 2D materials remains to be resolved for industrial-scale hydrogen production. Here, we report layered platinum tellurides, mitrofanovite Pt3Te4, which serves as an efficient and stable catalyst for HER with an overpotential of 39.6 mV and a Tafel slope of 32.7 mV/dec together with a high current density exceeding 7000 mA/cm2. Pt3Te4 was synthesized as nanocrystals on a metallic molybdenum ditelluride (MoTe2) template by a rapid electrochemical method. X-ray diffraction and high-resolution transmission microscopy revealed that the Pt3Te4 nanocrystals have a unique layered structure with repeated monolayer units of PtTe and PtTe2. Theoretical calculations exhibit that Pt3Te4 with numerous edges shows near-zero Gibbs free-energy change of hydrogen adsorption, which shows the excellent HER performance as well as the extremely large exchange current density for massive hydrogen production.

Original languageEnglish
Pages (from-to)2437-2446
Number of pages10
JournalACS Applied Materials and Interfaces
Volume13
Issue number2
DOIs
StatePublished - 20 Jan 2021

Keywords

  • edges and defects
  • electrochemical deposition
  • hydrogen evolution reaction
  • mitrofavonite PtTe
  • platinum-tellurium compound

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