V. Sara Thoi
Sara was raised in Los Angeles, CA and found her love for chemistry as a high school student. Her interest in research was solidified at UC San Diego, where she conducted research in coordination complexes and metal organic frameworks and obtained her B.S. in Chemistry in 2008. She then traveled up the state to UC Berkeley where she received her PhD in Chemistry in 2013, studying molecular catalysts for photo- and electrochemical reduction of protons and carbon dioxide. Returning back to Los Angeles, Sara completed her postdoctoral work on the development of metal-carbon composites for solid acid fuel cells at Caltech in the Materials Science Department. In 2014, Sara was awarded the Young Investigator Award by the American Chemical Society, Division of Inorganic Chemistry.
She joined the Department of Chemistry at JHU in 2015 as an assistant professor. Her research group is focused on 1) the development of conductive metal and covalent organic frameworks for electrode and electrolyte materials in fuel cells and batteries, 2) the use of conductive aerogels as scaffolds for catalytic reactions, and 3) the discovery of new molecular metal complexes for activating energy-relevant small molecules.
Conductive Inorganic and Organic Porous Materials for Renewable Energy
The Thoi research group will integrate elements of synthetic chemistry and materials science for applications in both homogenous and heterogeneous catalysis. A unifying theme is the development of new technologies for sustainable energy generation and storage using molecular design in solid-state porous materials. Drawing on expertise in fundamental coordination chemistry, electro- and photocatalysis, and materials synthesis, we will form new strategies to devise novel catalytic systems for artificial photosynthesis and address key challenges in ion-conducting materials for battery and fuel cell devices.
Charge-Conducting Ionic Porous Materials for Energy Utilization and High Density Storage
Efficient proton transport in fuel cells and ion conduction in Li-based batteries are issues that can be addressed by novel solid-state charge-conducting material. Reticular materials such as metal organic frameworks (MOFs) and covalent organic frameworks (COFs) are robust and crystalline networks that have discrete channels amenable to ion conduction. The synthetic modularity of these organic frameworks makes tuning their porosity and transport properties easily achievable. We will install ionic motifs such as imidazolium in the framework to support the conduction of charges across the pores in the material. Our studies will be focused on non-aqueous ion-conducting materials that can operate in intermediate temperature fuel cells and can address key safety concerns in Li- and Mg-based batteries.
Carbon Nanofoams as Conductive Scaffolds for Artificial Photosynthesis
Carbon aerogels are highly porous, robust, and conductive materials that have been utilized in energy storage and catalytic applications such as supercapacitors and degradation of pollutants. We will explore the use of these materials as scaffolds for surface attachment of molecular catalysts. The facile synthesis of carbon aerogels allows for the incorporation of functional groups, such as –COOH and –NH2, that can generate a second coordination sphere around the active metal center that can enhance catalytic rates. In addition, we will investigate new methods of synthesizing and characterizing solid-state inorganic materials to understand where and how active sites develop by using carbon aerogels as templates and supports.
Molecular Metal Complexes for Small Molecule Activation
Biology have long taken advantage of metals for performing complex chemical transformation and charge transfers. Inspired by this rich chemistry, we will design new metal complexes that uses 1) naturally abundant elements, 2) redox-active ligands, and 3) a secondary coordination environment to activate small molecules that are relevant to a larger energy landscape. We are currently pursuing the synthesis of metal complexes supported by structurally flexible pincer ligands that contain protic sites, providing a local source of protons to activate small molecules like carbon dioxide, water, oxygen, and nitrogen.
Fall 2015: AS.030.404 Electrochemistry for Energy Conversion and Storage
This course will be focused on the fundamentals and applications of electrochemical methods in catalysis, charge transport, and energy conversion and storage. The goal of this course is to introduce fundamentals of electrochemistry in a manner that will allow for practical day-to-day applications in the laboratory. We will discuss how to use electrochemistry as an analytical technique that can be added to your toolbox for understanding chemical reactions as well as the role of electrochemistry in energy conversion and storage.
Pre-requisites: 030.204, 030.449, 030.472, or instructor approval for undergraduate students. No pre-requisites for graduate students.
Displaying the 20 most recent publications. View the Google Scholar Profile for complete publications list.
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VS Thoi, RE Usiskin, SM Haile
Platinum-decorated carbon nanotubes for hydrogen oxidation and proton reduction in solid acid electrochemical cells
Chemical Science 6 (2), 1570-1577, 2015
RS Khnayzer, VS Thoi, M Nippe, AE King, JW Jurss, KA El Roz, JR Long, ...
Towards a comprehensive understanding of visible-light photogeneration of hydrogen from water using cobalt (II) polypyridyl catalysts
Energy & Environmental Science 7 (4), 1477-1488, 2014
VS Thoi, N Kornienko, CG Margarit, P Yang, CJ Chang
Visible-light photoredox catalysis: selective reduction of carbon dioxide to carbon monoxide by a nickel N-heterocyclic carbene–isoquinoline complex
Journal of the American Chemical Society 135 (38), 14413-14424, 2013
VS Thoi, Y Sun, JR Long, CJ Chang
Complexes of earth-abundant metals for catalytic electrochemical hydrogen generation under aqueous conditions
Chemical Society Reviews 42 (6), 2388-2400, 2013
EJ Sundstrom, X Yang, VS Thoi, HI Karunadasa, CJ Chang, JR Long, ...
Computational and experimental study of the mechanism of hydrogen generation from water by a molecular molybdenum-oxo electrocatalyst
Journal of the American Chemical Society 134 (11), 5233-5242, 2012
VS Thoi, HI Karunadasa, Y Surendranath, JR Long, CJ Chang
Electrochemical generation of hydrogen from acetic acid using a molecular molybdenum–oxo catalyst
Energy & Environmental Science 5 (7), 7762-7770, 2012
VS Thoi, CJ Chang
Nickel N-heterocyclic carbene–pyridine complexes that exhibit selectivity for electrocatalytic reduction of carbon dioxide over water
Chemical Communications 47 (23), 6578-6580, 2011
VS Thoi, JR Stork, ET Niles, EC Depperman, DL Tierney, SM Cohen
Diamidodipyrrins: Versatile Bipyrrolic Ligands with Multiple Metal Binding Modes
Inorganic chemistry 47 (22), 10533-10541, 2008
JR Stork, VS Thoi, SM Cohen
Rare examples of transition-metal− main-group metal heterometallic metal− organic frameworks from gallium and indium dipyrrinato complexes and silver salts: synthesis and framework variability
Inorganic chemistry 46 (26), 11213-11223, 2007
VS Thoi, JR Stork, D Magde, SM Cohen
Luminescent dipyrrinato complexes of trivalent group 13 metal ions
Inorganic chemistry 45 (26), 10688-10697, 2006