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New research could boost a solar-powered fuel made by splitting water


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Hydrogen is an incredibly powerful fuel, and the ingredients are everywhere in plain old water. Researchers would love to be able to use it widely as a clean and sustainable energy source.
One catch, however, is that a considerable amount of energy is required to split water and make hydrogen. Thus scientists have been working on fabricating materials for photoelectrodes that can use solar energy to split water, creating a solar fuel that can be stored for later use.
Scientists with the University of Chicago, the University of Madison-Wisconsin and Brookhaven National Laboratory published a new breakthrough in making such photoelectrodes. Their research, reported in ....

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Tuning Electrode Surfaces to Optimize Solar Fuel Production


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Tuning Electrode Surfaces to Optimize Solar Fuel Production
An electrode material with modified surface atoms generates more electrical current, which drives the sunlight-powered reactions that split water into oxygen and hydrogen a clean fuel
February 18, 2021
Through a tight coupling of experiment and theory, scientists showed at the atomic level how changes in the surface composition of a photoelectrode play a critical role in photoelectrochemical performance.
UPTON, NY Scientists have demonstrated that modifying the topmost layer of atoms on the surface of electrodes can have a remarkable impact on the activity of solar water splitting. As they reported in
Nature Energy on Feb. 18, bismuth vanadate electrodes with more bismuth on the surface (relative to vanadium) generate higher amounts of electrical current when they absorb energy from sunlight. This photocurrent drives the chemical reactions that split water into oxygen and hydrogen. The hydr ....

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