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Tamaki Matoba, Dr. Kazuhiko Maeda and Prof. Dr. Kazunari Domen Activation of BaTaO2N Photocatalyst for Enhanced Non-Sacrificial Hydrogen Evolution from Water under Visible Light by Forming a Solid Solution with BaZrO3 Chemistry - A European Journal 17

Article first published online: 28 NOV 2011 | DOI: 10.1002/chem.201102970

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No sacrifice needed! Activation of perovskite-type BaTaO2N (band gap: 1.8–1.9 eV) to improve photocatalytic activity for non-sacrificial H2 evolution from water under visible light (λ>420 nm) was achieved by forming a solid solution with BaZrO3, improving the performance six- to ninefold (see figure). The improvement is attributable to the increased driving force for the redox reactions and the reduced density of defects, which minimizes the undesirable electron–hole recombination.

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