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In-situ spectroscopies of mixed-metal nanosheet water oxidation catalysts made by pulsed laser ablation in liquids

Hunter, Bryan and Winkler, Jay and Gray, Harry and Mueller, Astrid (2016) In-situ spectroscopies of mixed-metal nanosheet water oxidation catalysts made by pulsed laser ablation in liquids. In: 251st American Chemical Society National Meeting & Exposition, March 13-17, 2016, San Diego, CA. http://resolver.caltech.edu/CaltechAUTHORS:20160401-110652850

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Abstract

Our ability to utilize sustainable resources will be crit. in meeting the ever-increasing global energy demand in an eco-friendly manner. The most reliable and available source of sustainable energy is the sun. The biggest challenges to its practical utilization are its intermittency on earth and unequal local energy needs. As a consequence, we must find a way to convert solar energy into storable, transportable fuels. We envision a solar water splitting device that produces hydrogen fuel. Subsequent functionalization with carbon dioxide will produce liq. fuels that are carbon neutral upon combustion. Water oxidn., the more demanding half-reaction in the water splitting process, is a key component to such a working device. Earth-abundant, efficient, and robust water oxidn. catalysts need to be rationally designed based on their catalytic mechanisms. We have employed novel in-situ spectroelectrochem. techniques to identify short-lived catalytic intermediates under turnover conditions. We recently reported [NiFe]-LDH (layered double hydroxide) nanocatalyst materials that are highly active for water oxidn. [Hunter, Blakemore, Deimund, Gray, Winkler, M.ovrddot.uller, J. Soc.2014, 136, 13118] . Our in-situ IR, Raman, and UV-visible spectroscopic data in non-aq. solvents suggest that the LDH framework may support high-valent metal species. Strategic injection of substrate indicates that this transient species is quenched by water. Our isotope labeling expts. have shed light on the structure of catalytic intermediates.


Item Type:Conference or Workshop Item (Paper)
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URLURL TypeDescription
http://www.acs.org/content/acs/en/meetings/spring-2016.htmlOrganizationConference Website
ORCID:
AuthorORCID
Winkler, Jay0000-0002-4453-9716
Additional Information:© 2016 American Chemical Society.
Group:CCI Solar Fuels
Record Number:CaltechAUTHORS:20160401-110652850
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160401-110652850
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:65849
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:01 Apr 2016 19:13
Last Modified:15 Sep 2017 18:24

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