Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 1, Issue 25, Pages 7422-7432Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta11192j
Keywords
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Funding
- National Science Council of the Republic of China, Taiwan [NSC 100-2112-M-003-009-MY3, NSC 101-2113-M-002-014-MY3]
- Science and Engineering Research Board of the Department of Science and Technology, India [DST SR/S1/PC-31/2012]
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The efficiency of hydrogen generation through photocatalytic water cleavage was elucidated for calcinated Cd-ZnGeON host systems. The electronic structures of the Cd-ZnGeON solid solution were explored via synchronized X-ray diffraction, X-ray absorption spectroscopy at the K-edge for elements O, N, Zn and Ge, X-ray photoelectron spectroscopy, diffuse reflection spectroscopy, and high-resolution transmission electron microscopy, etc., which were used as sensitive analytical probes. A good correlation was observed between the ability of Cd-ZnGeON for photocatalytic water splitting and the local atomic arrangement in its lattice. Based on advanced structural information about the solid solution, a concise lattice-model was proposed for hydrogen generation through water splitting. The electron-transfer route for hydrogen generation via photocatalytic water cleavage was also traced. The results reveal that the wurtzite Cd-ZnGeON calcinated at 600 degrees C generates a large amount of hydrogen (3647.25 mu mol H-2 h(-1) g(-1)).
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