Walter DrisdellCSD Staff Scientist, Joint Center for Artificial Photosynthesis (JCAP)
Lawrence Berkeley National Laboratory
One Cyclotron Road, Mailstop 30R0205
Berkeley, CA 94720
The Joint Center for Artificial Photosynthesis (JCAP) is one of the Department of Energy Innovation Hubs. Its mission is to generate carbon-neutral fuels efficiently using only sunlight and water or carbon dioxide and sustainable materials. A number of CSD scientists participate in JCAP, working on catalysts, transformations using materials assemblies, and interfacial chemistry.
Dr. Drisdell’s interests center around understanding the chemistry and chemical mechanisms that underlie processes relating to energy research, through a combination of in situ experimentation and first principles calculations. His primary focus is on synchrotron X-ray techniques, because these provide elemental and electronic selectivity even in complex chemical environments. When coupled with computations, these techniques offer information about chemical species, orientations, and electronic configurations, and the role these play in efficiency and performance.
In JCAP, Dr. Drisdell is engaged in in situ synchrotron X-ray spectroscopic studies to probe the mechanism for CO2 reduction. This includes studies of both catalysts and electrochemical products, utilizing in situ hard and soft X-ray absorption spectroscopy as well as X-ray photoelectron spectroscopy. Instrument design, experimentation, and first principles computations are all integral to this effort. The initial focus is on developing and demonstrating sensitivity to the interface between the catalyst and the electrolyte (or gaseous reactive medium) during operation.
Fukushima, T., Drisdell, W., Yano, J. & Surendranath, Y. Graphite-Conjugated Pyrazines as Molecularly Tunable Heterogeneous Electrocatalysts. Journal of the American Chemical Society 137(34), 10926-10929, DOI: 10.1021/jacs.5b06737 (2015).
Lichterman, M. F. et al. Direct Observation of the Energetics at a Semiconductor/Liquid Junction byOperando X-ray Photoelectron Spectroscopy. Energy Environ. Sci., 2015, DOI: 10.1039/C5EE01014D(2015).
Loiudice, A. et al. Bandgap Tunability in Sb-Alloyed BiVO4 Quaternary Oxides as Visible Light Absorbers for Solar Fuel Applications. Advanced Materials, DOI: 10.1002/adma.201502361 (2015).
Van Allsburg, K., Anzenberg, E., Drisdell, W., Yano, J. & Tilley, T. D. Oxygen-Atom Transfer Chemistry and Thermolytic Properties of a Di-tert-butylphosphate-Ligated Mn4O4 Cubane. Chemistry - A European Journal, DOI: 10.1002/chem.201406114 (2015).