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Development of Novel First Principles Simulations for Reactions at Complex Geochemical Interfaces


EMSL Project ID
51204

Abstract

The proposed development work in this theoretical cross-cutting staff proposal include: (1) Development of new algorithms supporting high-level electron structure calculation of reaction mechanisms involving charge transfer (e.g., electron transfer and proton exchange reactions in partially hydrated mineral surfaces). This software will support the prediction of the mechanisms of electron transfer, the structure of defects in oxides and identify charge transfer mechanisms occurring at the mineral water interface. (2) Development of simulation methods for the interpretation of IR and Raman of the fluid and interface structures. (3) Explore machine learning methods to efficiently sample fluid and interface structure. This software will support proposed EXAFS analysis studies with Rosso and Ilton (EMSL users), as well as other current and future interpretations of vibrational and x-ray spectroscopies in the project. (4) Improving the performance and usability of our codes for geochemistry and environmental researchers, including the continued development of reaction path searching methods. (5) In collaboration with Bagus, develop Software and Modeling strategies to Support Mössbauer Spectroscopy Interpretation (EMSL experimental capability).

Project Details

Start Date
2019-10-15
End Date
2020-06-08
Status
Closed

Team

Principal Investigator

Eric Bylaska
Institution
Pacific Northwest National Laboratory

Team Members

Paul Tratnyek
Institution
Oregon Health & Science University

John Weare
Institution
University of California, San Diego

Related Publications

Bylaska E.J., D. Song, and K.M. Rosso. 2020. "Electron Transfer Calculations Between Edge Sharing Octahedra in Hematite, Goethite, and Annite." Geochimica et Cosmochimica Acta. PNNL-SA-149955. doi:10.1016/j.gca.2020.04.036
Harmon K.J., Y. Chen, E.J. Bylaska, J.G. Catalano, M.J. Bedzyk, J.H. Weare, and P. Fenter. 2018. "Insights on the Alumina-Water Interface Structure by Direct Comparison of Density Functional Simulations with X-ray Reflectivity." Journal of Physical Chemistry C 122, no. 47:26934-26944. PNNL-SA-138269. doi:10.1021/acs.jpcc.8b08522
Torralba-Sanchez T.L., E.J. Bylaska, A. Salter-Blanc, D.E. Meisenheimer, M.A. Lyon, and P.G. Tratnyek. 2020. "Reduction of 1,2,3-Trichloropropane (TCP): Pathways and Mechanisms from Computational Chemistry Calculations." Environmental Science Processes & Impacts 22, no. 3:606-616. PNNL-SA-149824. doi:10.1039/c9em00557a