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Reaction mechanisms at the homogeneous–heterogeneous frontier: Insights from first-principles studies on ligand-decorated metal nanoparticles

Abstract

The frontiers between homogeneous and heterogenous catalysis are progressively disappearing. The decoration of transition metal nanoparticles (NPs) with ligands, also known as surface modifiers or capping agents, primary allows NP size control but dramatically impacts activity and selectivity in catalysis. Computational tools have shown their capability of providing insight at atomic level in both homogeneous and heterogeneous areas but, due to the complexity of these interfaces, the underlying reaction mechanisms are often not described and certainly not well understood. In this mini-review, we describe the main challenges in modelling and survey the most recent computational studies that emphasise the role of ligands in tuning catalytic performance. We focus on density functional theory (DFT) simulations of the interfaces between transition metals (ruthenium, palladium, platinum, gold) and organic ligands (NHC, amine, phosphine, thiol), surfactants, and ionic liquids. Revealing the reaction pathways that operates at this hidden interface between homogeneous and heterogeneous worlds will provide guiding rules to design new systems that circumvent linear scaling relationships and foster a unified theory of Catalysis.

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Publication details

The article was received on 08 Jul 2019, accepted on 09 Aug 2019 and first published on 12 Aug 2019


Article type: Minireview
DOI: 10.1039/C9CY01351B
Catal. Sci. Technol., 2019, Accepted Manuscript

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    Reaction mechanisms at the homogeneous–heterogeneous frontier: Insights from first-principles studies on ligand-decorated metal nanoparticles

    M. A. Ortuno and N. Lopez, Catal. Sci. Technol., 2019, Accepted Manuscript , DOI: 10.1039/C9CY01351B

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