Acetonitrile Transition Metal Interfaces from First Principles

Thomas Ludwig, Aayush R. Singh, Jens K. Nørskov*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Acetonitrile is among the most commonly used nonaqueous solvents in catalysis and electrochemistry. We study its interfaces with multiple facets of the metals Ag, Cu, Pt, and Rh using density functional theory calculations; the structures reported shed new light on experimental observations and underscore the importance of solvent-solvent interactions at high coverage. We investigate the relationship of potential of zero charge (PZC) to metal work function, reporting results in agreement with experimental measurements. We develop a model to explain the effects of solvent chemisorption and orientation on the PZC to within a mean absolute deviation of 0.08-0.12 V for all facets studied. Our electrostatic field dependent phase diagram agrees with spectroscopic observations and sheds new light on electrostatic field effects. This work provides new insight into experimental observations on acetonitrile metal interfaces and provides guidance for future studies of acetonitrile and other nonaqueous solvent interfaces with transition metals.
Original languageEnglish
JournalJournal of Physical Chemistry Letters
Volume11
Pages (from-to)9802-9811
ISSN1948-7185
DOIs
Publication statusPublished - 2020

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