Structure and Electronic Properties of Transition-Metal/Mg Bimetallic Clusters at Realistic Temperatures and Oxygen Partial Pressures
Saini S, Sarker D, Basera P, Levchenko SV, Ghiringhelli LM, Bhattacharya S (2018)
Publication Type: Journal article
Publication year: 2018
Journal
Book Volume: 122
Pages Range: 16788-16794
Journal Issue: 29
DOI: 10.1021/acs.jpcc.8b03787
Abstract
Composition, atomic structure, and electronic properties of TMxMgyOz clusters [transition metal (TM) = Cr, Ni, Fe, and Co, x + y ≤ 3] under realistic temperature T and oxygen partial pressure pO2 conditions are explored using the ab initio atomistic thermodynamics approach. The low-energy isomers of the different clusters are identified using a massively parallel cascade genetic algorithm on the hybrid density-functional theory level. On analyzing a large set of data, we find that the fundamental gap Eg of the thermodynamically stable clusters is strongly affected by the presence of Mg-coordinated O2 moieties. By contrast, the nature of the TM does not play a significant role in determining Eg. Using Eg of a cluster as a descriptor of its redox properties, our finding is against the conventional belief that the TM plays a key role in determining the electronic and therefore chemical properties of the clusters. High reactivity may be correlated more strongly with the oxygen content in the cluster than with any specific TM type.
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APA:
Saini, S., Sarker, D., Basera, P., Levchenko, S.V., Ghiringhelli, L.M., & Bhattacharya, S. (2018). Structure and Electronic Properties of Transition-Metal/Mg Bimetallic Clusters at Realistic Temperatures and Oxygen Partial Pressures. Journal of Physical Chemistry C, 122(29), 16788-16794. https://doi.org/10.1021/acs.jpcc.8b03787
MLA:
Saini, Shikha, et al. "Structure and Electronic Properties of Transition-Metal/Mg Bimetallic Clusters at Realistic Temperatures and Oxygen Partial Pressures." Journal of Physical Chemistry C 122.29 (2018): 16788-16794.
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