Refining Biomimetic Interfaces for Solar Hydrogen Production

Literature seminar Abstract.1

While society strives for a more convenient day to day world an increasing sum of energy is required. Energy production via fossil fuels (Petroleum, natural gas, and coal), which accounts for over 80% of the US energy consumption, produce greenhouse gases that are predicted to greatly affect the global climate and water conditions in the coming decades. New materials and devices are required to create a more sustainable energy economy. Photocatalytic systems are engineered in order to utilize solar radiation to activate molecular catalysts which drive a myriad of chemical reactions. Here I will focus on the enzymatic production of hydrogen fuel when Fe-Fe hydrogenase is paired with the semiconductor cadmium sulfide, and the interfaces effects on the competing electronic mechanisms. I will introduce a system made by our collaborators at NREL which bound Fe-Fe hydrogenases to CdS nanoparticles using varying linker lengths. They studied the electron transfer rates as well as other competing electronic processes effected by ligand length using transient absorption. I will then go beyond their system and introduce a library of hydrogenase enzymes produced by the Ackerson group as well as new linker molecules in the hopes of better elucidating the electron injection processes into the hydrogenase enzyme.

 

(1)           Wilker, Molly B., James K. Utterback, Sophie Greene, Katherine A. Brown, David W. Mulder, Paul W. King, and Gordana Dukovic. “The Role of Surface-Capping Ligands in Photoexcited Electron Transfer Between CdS Nanorods and [FeFe] Hydrogenase and the Subsequent H2 Generation.” The Journal of Physical Chemistry C (2017).

 

 

Division(s): Materials

Speaker: Collin Perry

Speaker Institution: Colorado State University

Event Date: 02-13-2018

Event Time: 4:00 PM

Event Location: Chemistry A101

Mixer Time: 3:45 PM

Mixer Location: Chemistry B101E

Host: C. Ackerson