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Communication: Water activation and splitting by single metal-atom anions

Author

Liu, Gaoxiang
Miliordos, Evangelos
Ciborowski, Sandra M.
Tschurl, Martin
Boesl, Ulrich
Heiz, Ulrich
Zhang, Xinxing
Xantheas, Sotiris S.
Bowen, Kit
https://orcid.org/0000-0003-3471-7133

Abstract

We report experimental and computational results pertaining to the activation and splitting of single water molecules by single atomic platinum anions. The anion photoelectron spectra of [Pt(H2O)](-), formed under different conditions, exhibit spectral features that are due to the anion-molecule complex, Pt-(H2O), and to the reaction intermediates, HPtOH- and H2PtO-, in which one and two O-H bonds have been broken, respectively. Additionally, the observations of PtO- and H-2(+) in mass spectra strongly imply that water splitting via the reaction Pt- + H2O -> PtO- + H-2 has occurred. Extending these studies to nickel and palladium shows that they too are able to activate single water molecules, as evidenced by the formation of the reaction intermediates, HNiOH- and HPdOH-. Computations at the coupled cluster singles and doubles with perturbatively connected triples level of theory provide structures and vertical detachment energies (VDEs) for both HMOH- and H2MO- intermediates. The calculated and measured VDE values are in good agreement and thus support their identification. Published by AIP Publishing.