PhotoelectrochemicalWater Splitting - Stanford （PhotoelectrochemicalWater分裂斯坦福大学）.pdf

SRI International Photoelectrochemical Water Splitting GCEP Hydrogen Workshop April 14 and 15, Stanford University D. Brent MacQueen Brent.macqueen@ SRI International, Menlo Park CA Off We Go… “We are at the peak of the oil age but the beginning of the hydrogen age. Anything else is an interim solution. The transition will be very messy, and will take many technological paths but the future will be hydrogen fuel cells.” Herman Kuipers, Manager of Exploratory Research Royal Dutch Shell “General Motors absolutely sees the long-term future of the world being based on a hydrogen economy.” Larry Burns, Director of RD, General Motors Sustainable Paths to Hydrogen Renewable Energy Renewable Energy Heat Biomass Heat Biomass Mechanical Energy Mechanical Energy Electricity Conversion Electricity Conversion Thermolysis Electrolysis Photolysis Thermolysis Electrolysis Photolysis Hydrogen Hydrogen Hydrogen From Visible Light and Water Visible light has enough energy to split water (H O) into hydrogen (H ) and oxygen (O ). 2 2 2 Fortunately water is transparent and does not absorb this energy. The combination of a light harvesting system and a water splitting system is necessary to be able to use sunlight to split water. Photoelectrochemical processes alo