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Published on: December 6, 2021
Trace Amount of NiP2 Cooperative CoMoP Nanosheets Inducing Efficient Hydrogen Evolution
Yechen Wang1,2, Yange Wang1,2, Jing Bai3,2
1Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, Center for Green Innovation, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China.
A novel electrocatalyst combining nickel phosphide (NiP2) and cobalt molybdenum phosphide (CoMoP) nanosheets efficiently produces hydrogen. This synergistic catalyst shows excellent performance for the hydrogen evolution reaction (HER), offering a promising clean energy solution.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Hydrogen is a clean energy carrier with high energy density, crucial for addressing global energy shortages and environmental pollution.
- Developing efficient electrocatalysts for the hydrogen evolution reaction (HER) is vital for practical hydrogen production.
- Current HER catalysts face challenges in performance, cost, and stability.
Purpose of the Study:
- To synthesize and characterize a novel electrocatalyst composed of nickel phosphide (NiP2) and cobalt molybdenum phosphide (CoMoP) nanosheets.
- To investigate the synergistic effects between NiP2 and CoMoP on HER performance.
- To optimize the Ni content for superior catalytic activity.
Main Methods:
- One-step hydrothermal synthesis followed by low-temperature phosphidation.
- Characterization of the synthesized nickel phosphide and cobalt molybdenum phosphide (NCMP) nanosheets.
- Electrochemical testing to evaluate hydrogen evolution reaction (HER) performance, including overpotential measurements.
Main Results:
- A trace amount of NiP2 significantly enhanced the HER performance of CoMoP nanosheets, indicating a synergistic effect.
- The optimal Ni content (0.02 mM) resulted in the NCMP-2 catalyst exhibiting an outstanding overpotential of 46 mV at 10 mA cm-2.
- The synthesized NCMP catalyst demonstrated excellent catalytic activity for hydrogen production.
Conclusions:
- The synergistic interaction between NiP2 and CoMoP is key to achieving high HER performance.
- The developed NCMP electrocatalyst represents a promising material for efficient and clean hydrogen production.
- Further research can explore scaling up the synthesis and long-term stability of these catalysts.
