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This hydrogen fuel machine could be the ultimate guide to self-improvement


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IMAGE: Guosong Zeng, a postdoctoral scholar in Berkeley Lab s Chemical Sciences Division, at work testing an artificial photosynthesis device made of gallium nitride. Zeng, along with Berkeley Lab staff scientist Francesca.
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Credit: Thor Swift/Berkeley Lab
Three years ago, scientists at the University of Michigan discovered an artificial photosynthesis device made of silicon and gallium nitride (Si/GaN) that harnesses sunlight into carbon-free hydrogen for fuel cells with twice the efficiency and stability of some previous technologies.
Now, scientists at the Department of Energy s (DOE s) Lawrence Berkeley National Laboratory (Berkeley Lab) - in collaboration with the University of Michigan and Lawrence Livermore National Laboratory (LLNL) - have uncovered a surprising, self-improving property in Si/GaN that contributes to the material s highly efficient and stable performance in converting light and water into carbon-free hydrogen ....

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Artificial photosynthesis devices that improve themselves with use


Guosong Zeng, a postdoctoral scholar, and Francesca Toma, a staff scientist, both in the Chemical Sciences Division of Lawrence Berkeley National Laboratory, test the artificial photosynthesis device developed by Zetian Mi, a professor of electrical and computer engineering at the University of Michigan. Rather than degrading over time, as is typical for devices that turn water and light into hydrogen fuel, this device improves. Image credit: Berkeley Lab
In a finding that could help make artificial photosynthesis a practical method for producing hydrogen fuel, researchers have discovered why a water-splitting device made with cheap and abundant materials unexpectedly becomes more efficient during use. ....

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