| Autor: |
Hutchison P; Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States., Warburton RE; Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States., Surendranath Y; Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States., Hammes-Schiffer S; Department of Chemistry, Yale University, New Haven, Connecticut 06520, United States. |
| Jazyk: |
angličtina |
| Zdroj: |
The journal of physical chemistry letters [J Phys Chem Lett] 2022 Dec 08; Vol. 13 (48), pp. 11216-11222. Date of Electronic Publication: 2022 Nov 29. |
| DOI: |
10.1021/acs.jpclett.2c03278 |
| Abstrakt: |
Graphite-conjugated catalysts (GCCs) provide a powerful framework for investigating correlations between electronic structure features and chemical reactivity of single-site heterogeneous catalysts. GCC-phenazine undergoes proton-coupled electron transfer (PCET) involving protonation of phenazine at its two nitrogen atoms with the addition of two electrons. Herein, this PCET reaction is investigated in the presence of defects, such as heteroatom dopants, in the graphitic surface. The proton-coupled redox potentials, E PCET , are computed using a constant potential periodic density functional theory (DFT) strategy. The electronic states directly involved in PCET for GCC-phenazine exhibit the same nitrogen orbital character as those for molecular phenazine. The energy ε LUS of this phenazine-related lowest unoccupied electronic state in GCC-phenazine is identified as a descriptor for changes in PCET thermodynamics. Importantly, ε LUS is obtained from only a single DFT calculation but can predict E PCET , which requires many such calculations. Similar electronic features may be useful descriptors for thermodynamic properties of other single-site catalysts. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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