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One of the most exciting talks at AAAS dealt with a breakthrough that might finally give the much-vaunted hydrogen economy a chance. Daniel Nocera, Professor of Energy and Professor of Chemistry at MIT gave a plenary lecture on a novel catalyst developed in his laboratory, one that takes inspiration from the photosynthetic pathwayswithin plant cells to split water into H₂ and O₂, allowing the H₂ to be used as fuel.


Meeting the world's future energy demand is going to need the sun, according to Nocera, and that's only going to happen if we can store that energy for use when it's not shining. This makes sense; plants evolved to make use of high-energy chemical bonds, and the oil, gas, and coal we currently use is just stored sunshine (via plants), albeit concentrated. Hydrogen is the only viable answer compared to batteries, capacitors, or mechanical storage schemes such as pumped water or compressed air once you look at energy density, he explained, and the work from his lab might help make that possible.


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