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Related Experiment Video

Updated: Feb 14, 2026

Fabrication of Schottky Diodes on Zn-polar BeMgZnO/ZnO Heterostructure Grown by Plasma-assisted Molecular Beam Epitaxy

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In Situ Grown Epitaxial Heterojunction Exhibits High-Performance Electrocatalytic Water Splitting.

Changrong Zhu^1,2, An-Liang Wang³, Wen Xiao⁴

¹School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore.

Advanced Materials (Deerfield Beach, Fla.)

|February 14, 2018

Summary

Engineered Co-Ni3N nanowires boost electrocatalysis. This atomic epitaxial in-growth approach enhances hydrogen and oxygen evolution reactions by facilitating electron transfer at the interface.

Keywords:

epitaxial in-growth hydrogen evolution reaction metal nitride arrays nanoconfinement oxygen evolution reaction

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Area of Science:

Materials Science
Electrochemistry
Nanotechnology

Background:

Electrocatalytic performance is crucial for energy conversion technologies.
Nanoheterojunctions and interface electronic structure engineering are key to enhancing electrocatalysis.
Developing efficient electrocatalysts for hydrogen and oxygen evolution reactions (HER and OER) remains a challenge.

Purpose of the Study:

To develop a novel atomic epitaxial in-growth strategy for Co-Ni3N nanowires.
To investigate the nanoconfinement effect at the interface of the heterostructure.
To enhance electrocatalytic activities for both HER and OER.

Main Methods:

Fabrication of Co-Ni3N heterostructure nanowire arrays via thermal annealing of NiCo2O4 precursors.
In situ characterization of the epitaxial in-growth structure.
Electrochemical testing for hydrogen and oxygen evolution reactions.
Density functional theory (DFT) calculations and electronic binding energy shift analysis to verify interface effects.

Main Results:

Successfully synthesized Co-Ni3N heterostructure nanowire arrays with retained morphology.
Observed significant enhancement in catalytic activities for HER (10 times) and OER (16 times) compared to Ni3N nanorods.
Verified facilitated electron transfer across the epitaxial interface through experimental and computational methods.
Demonstrated a pronounced nanoconfinement effect at the interface.

Conclusions:

The atomic epitaxial in-growth of Co-Ni3N is an effective strategy for high-performance electrocatalysis.
Nanoconfinement at the interface plays a vital role in enhancing catalytic activity.
This approach offers a promising pathway for advanced electrocatalysts in energy storage and conversion applications.