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Nanostructured nickel phosphide as an electrocatalyst for the hydrogen evolution reaction
Eric J Popczun1, James R McKone, Carlos G Read
1Department of Chemistry and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.
Nickel phosphide (Ni2P) nanoparticles show excellent activity and stability for the hydrogen evolution reaction (HER) in acidic solutions. These non-noble metal catalysts offer a promising alternative for efficient hydrogen production via electrolysis.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Proton exchange membrane (PEM) electrolysis requires efficient electrocatalysts for hydrogen evolution reaction (HER).
- Non-noble metal catalysts are sought as cost-effective alternatives to precious metals for HER.
- Nickel phosphide (Ni2P) has theoretical potential for HER catalysis.
Purpose of the Study:
- To investigate the electrocatalytic activity and stability of nickel phosphide (Ni2P) nanoparticles for HER.
- To evaluate Ni2P as a non-noble metal catalyst for hydrogen production in acidic media.
Main Methods:
- Synthesis and characterization of Ni2P nanoparticles.
- Electrochemical testing of Ni2P nanoparticles for HER in acidic solutions.
- Assessment of catalytic activity and stability.
Main Results:
- Hollow and faceted Ni2P nanoparticles were synthesized, exposing the active Ni2P(001) surface.
- Ni2P nanoparticles exhibited high HER activity, comparable to non-noble metal benchmarks.
- Quantitative faradaic yield for H2(g) production was achieved.
- Excellent stability was demonstrated in aqueous acidic media.
Conclusions:
- Ni2P nanoparticles are highly active and stable electrocatalysts for HER in acidic media.
- The exposed Ni2P(001) surface contributes significantly to the catalytic performance.
- Ni2P presents a viable non-noble metal alternative for efficient hydrogen evolution in PEM electrolysis.
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