Wafer-Level Photocatalytic Water Splitting on GaN Nanowire Arrays Grown by Molecular Beam Epitaxy
Nano Letters2011Vol. 11(6), pp. 2353–2357
Citations Over TimeTop 10% of 2011 papers
Defa Wang, Adrien Pierre, Md Golam Kibria, Kai Cui, Xueguang Han, Kirk H. Bevan, Hong Guo, Suzanne Paradis, Abou-Rachid Hakima, Zetian Mi
Abstract
We report on the achievement of wafer-level photocatalytic overall water splitting on GaN nanowires grown by molecular beam epitaxy with the incorporation of Rh/Cr(2)O(3) core-shell nanostructures acting as cocatalysts, through which H(2) evolution is promoted by the noble metal core (Rh) while the water forming back reaction over Rh is effectively prevented by the Cr(2)O(3) shell O(2) diffusion barrier. The decomposition of pure water into H(2) and O(2) by GaN nanowires is confirmed to be a highly stable photocatalytic process, with the turnover number per unit time well exceeding the value of any previously reported GaN powder samples.
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