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Published on: April 27, 2018
Two-Dimensional Graphdiyne-Confined Platinum Catalyst for Hydrogen Evolution and Oxygen Reduction Reactions
Li Xin Chen1, Ming Jiang1, Zhuole Lu1
1Department of Materials Science and Engineering, University of Toronto, 184 College Street, Suite 140, Toronto, Ontario M5S 3E4, Canada.
Two-dimensional graphdiyne (GDY) enhances platinum (Pt) catalysts for hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR). This 2D confinement improves stability, activity, and inhibits CO poisoning.
Area of Science:
- Materials Science
- Catalysis
- Electrochemistry
Background:
- Platinum (Pt)-based materials are leading catalysts for hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR).
- Improving the catalytic activity and stability of Pt-based catalysts remains a significant challenge.
Purpose of the Study:
- To investigate the effect of two-dimensional (2D) graphdiyne (GDY) as a covering layer on Pt catalysts for HER and ORR.
- To explore the 2D confinement effect of GDY on the catalytic performance and stability of Pt.
Main Methods:
- Density functional theory (DFT) calculations were employed to model the GDY/Pt(111) interface.
- Analysis of catalytic activity, stability, and CO poisoning inhibition through theoretical calculations.
Main Results:
- The 2D GDY layer enhances Pt catalyst stability by forming a heterogeneous GDY/Pt(111) interface.
- GDY/Pt(111) exhibits improved catalytic activities for HER (0.26 V) and ORR (0.51 V) compared to bare Pt (0.29 V for HER, 0.62 V for ORR).
- GDY confinement weakens CO adsorption energy to -1.81 eV, mitigating CO poisoning.
Conclusions:
- 2D graphdiyne confinement offers a new strategy to enhance the performance of Pt-based catalysts for HER and ORR.
- The findings provide insights into utilizing 2D materials for advanced electrocatalyst design.
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