Structure and magnetism of neutral and anionic palladium clusters

Area of Science:

• Computational materials science
• Quantum chemistry
• Surface science

Background:

• Palladium clusters are crucial in catalysis and materials science.
• Understanding their electronic and magnetic properties is key to designing new applications.
• Previous studies have explored various aspects of palladium cluster behavior.

Purpose of the Study:

• To investigate the structural and magnetic properties of neutral and anionic palladium (Pd) clusters.
• To determine ground-state structures and magnetic spin states.
• To calculate vertical electron detachment and ionization energies for comparison with experimental data.

Main Methods:

• Spin-density-functional calculations were employed.
• Ground-state structures and spin isomers were identified.
• Vertical electron detachment and ionization energies were computed.

Main Results:

• Neutral Pd(N) clusters adopt three-dimensional structures for N > 3.
• Magnetic properties include spin triplet states (2 ≤ N ≤ 7) and a spin nonet (N = 13).
• An anomalous increase in magnetic moment with temperature is predicted for Pd7 clusters.
• Calculated vertical electron detachment energies align well with experimental data for anionic Pd(N) clusters.

Conclusions:

• The study provides detailed insights into the electronic and magnetic characteristics of palladium clusters.
• The findings contribute to a fundamental understanding of cluster magnetism and stability.
• The agreement with experimental data validates the computational approach for anionic clusters.