Mitrofanovite, Layered Platinum Telluride, for Active Hydrogen Evolution.
Dongyeon Bae1,2, Karam Park3, Hagyeong Kwon1,2
1Division of Chemical Engineering and Materials Science, ELTEC College of Engineering, Ewha Womans University, Seoul 03760, Republic of Korea.
ACS Applied Materials & Interfaces
|December 22, 2020
Summary
Layered platinum tellurides (Pt3Te4) show excellent efficiency and stability for the hydrogen evolution reaction (HER). This discovery offers a promising pathway for developing cost-effective catalysts for industrial hydrogen production.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Two-dimensional (2D) layered materials are ideal for hydrogen evolution reaction (HER) catalysis due to abundant active sites.
- Developing stable and economical 2D catalysts for industrial hydrogen production remains a challenge.
Purpose of the Study:
- To investigate layered platinum tellurides (Pt3Te4) as efficient and stable HER catalysts.
- To explore the synthesis and performance of Pt3Te4 nanocrystals for hydrogen production.
Main Methods:
- Synthesis of Pt3Te4 nanocrystals on a molybdenum ditelluride (MoTe2) template via an electrochemical method.
- Characterization using X-ray diffraction and high-resolution transmission electron microscopy.
- Theoretical calculations to understand hydrogen adsorption energy.
Main Results:
- Pt3Te4 exhibits an overpotential of 39.6 mV and a Tafel slope of 32.7 mV/dec for HER.
- Achieved high current density exceeding 7000 mA/cm2.
- Layered structure with PtTe and PtTe2 monolayers and near-zero Gibbs free energy for hydrogen adsorption.
Conclusions:
- Pt3Te4 is a highly efficient and stable catalyst for the hydrogen evolution reaction.
- The unique layered structure and electronic properties contribute to excellent catalytic performance.
- This material holds potential for large-scale, cost-effective hydrogen production.
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