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Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

The two-dimensional cobalt oxide (9 × 2) phase on Pd(100).

L Gragnaniello¹, G Barcaro, L Sementa

¹Institute of Physics, Karl-Franzens University Graz, Graz, Austria.

The Journal of Chemical Physics

|May 17, 2011

Summary

This summary is machine-generated.

This study reveals a novel 2D cobalt oxide monolayer on palladium, featuring a unique zig-zag antiferromagnetic structure. The research explores its complex atomic arrangement and coexistence with another phase using advanced microscopy and theory.

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Published on: April 12, 2019

Area of Science:

Surface Science
Materials Science
Condensed Matter Physics

Background:

Two-dimensional (2D) materials offer unique properties for advanced applications.
Understanding the atomic structure and magnetic ordering of oxide monolayers is crucial for catalysis and spintronics.

Purpose of the Study:

To investigate the structure and magnetic properties of a 2D cobalt oxide monolayer on a Pd(100) surface.
To elucidate the atomic-level details of the (9 × 2) Co oxide phase and its relationship with other coexisting phases.

Main Methods:

Experimental investigation using high-resolution scanning tunneling microscopy (STM).
Theoretical analysis employing density functional theory (DFT) calculations.

Main Results:

A complex coincidence lattice structure for the (9 × 2) Co oxide monolayer was identified, featuring symmetry relaxation and height modulations.
The most stable structure exhibits an unusual zig-zag antiferromagnetic ordering.
The (9 × 2) phase was found to be energetically close to a c(4 × 2) phase, with both phases observed to coexist and exhibit a distinct interfacial boundary.

Conclusions:

The 2D Co oxide nanolayer systems on Pd(100) demonstrate a complex interplay of chemical, electronic, and strain interactions.
The study highlights the challenges and importance of accurate theoretical descriptions for such intricate interfacial systems.