1 / 8

Biomimetic Systems for Solar to Fuel Conversion

Biomimetic Systems for Solar to Fuel Conversion. Christopher J. Chang UCB Chemistry LBNL Solar Energy Workshop 28-29 March 2005. Global Energy Deficit. 35 TW. Solar Energy 1.2 × 10 5 TW 600 TW available. ?. 10.1 TW short. 10,000 new nuclear plants (10 TW). 12.8 TW (U.S. 3.3 TW).

christian-townsend
Download Presentation

Biomimetic Systems for Solar to Fuel Conversion

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Biomimetic Systems for Solar to Fuel Conversion Christopher J. Chang UCB Chemistry LBNL Solar Energy Workshop 28-29 March 2005

  2. Global Energy Deficit 35 TW Solar Energy 1.2 × 105 TW 600 TW available ? 10.1 TW short 10,000 new nuclear plants (10 TW) 12.8 TW (U.S. 3.3 TW) wind/hydro (max 2.7 TW) renewable (0.3) nuclear (0.8) biomass (max 7 TW) wind/hydro (0.3) biomass (1.2) fossil fuels (10.2) fossil fuels (10.2 TW) World Energy Assessment, 2000 2000 2050

  3. Photosynthesis in a Beaker Solar energy stored in energy-rich molecules Hydrogen affords a clean, CO2-neutral fuel

  4. Reframing the Hydrogen Economy Solar energy stored in heteroatom molecules, not H2 Light must be used to drive reactions of M-X or M-O bonds

  5. Photosystem II: Nature’s Paradigm of Solar to Fuel Light Harvesting Catalysis/Energy Storage Proton-Coupled Electron Transfer

  6. Challenges for Biomimetic Solar to Fuel Conversion Multielectron Photochemistry (n 1hn/1e– events or 1hn/ne–) Bond-Forming Catalysis with Light Metals (O2, H2, X2 production using Mn, Fe, Co, Ni, Cu, Zn) Controlling Proton and Electron Transfer (facilitates charge separation and catalysis) Supramolecular Self-Assembly (spatial organization of components)

  7. O—O Bond Making and Breaking in Nature Photosystem II O—O formation Cytochrome c oxidase O—O cleavage DGin DGout G.T. Babcock Biochim. Biophys. Acta1998, 1365, 170

  8. Biomimetic Approach to O—O Bond Formation Attack of nucleophilic substrate on electrophilic metal–oxo O–Atom Transfer O—O Formation

More Related