EnergyBlog
 
 

Energy question of the week: Can sunlight be used to split water directly into oxygen and hydrogen?

10. May 2010, 09.40
Solar cells are good at converting sunlight directly into electricity. However, they come nowhere close to the efficiency of natural photosynthesis. Using chlorophyll, green plants have mastered the art of producing energy-rich molecules such as sugar and starch from carbon dioxide, water and sunlight. Would it not make sense to harness this natural process to generate energy?
Jan Oliver Löfken
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Jan Oliver Löfken
 
 

Energy question of the week: How can electricity be generated from hydrogen?

01. March 2010, 08.27
Fuel cells are surely the most elegant way of converting energy-rich fuels into electricity without emitting any carbon dioxide or other exhaust gases if hydrogen is the type of fuel used. Back in 1838, the German-Swiss chemist Christian Friedrich Schönbein successfully generated an electrical voltage from hydrogen and oxygen for the first time, using two platinum wires to accomplish this feat. Since then, many different types of fuel cells have been developed to a commercially marketable standard. What underlying principle do they all have in common?
Jan Oliver Löfken
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Jan Oliver Löfken