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المؤلفMohamed, Aya M.
المؤلفAmer, Ahmad W.
المؤلفAlqaradawi, Siham Y.
المؤلفAllam, Nageh K.
تاريخ الإتاحة2021-09-05T05:40:16Z
تاريخ النشر2016
اسم المنشورPhysical Chemistry Chemical Physics
المصدرScopus
الرقم المعياري الدولي للكتاب14639076
معرّف المصادر الموحدhttp://dx.doi.org/10.1039/c6cp02394k
معرّف المصادر الموحدhttp://hdl.handle.net/10576/22709
الملخصAn electrochemical method is presented to study the nature of the defect states in sub-stoichiometric tungsten oxide nanoflake photoanodes used in water splitting. First, stoichiometric/sub-stoichiometric tungstate nanoflake arrays were deliberately developed via annealing under different atmospheres (air, O2, and H2) in different sequences. UV-Vis diffuse reflectance spectra and Tauc analysis indicated the presence of oxygen vacancies, which was also confirmed via XRD and Raman analysis, with samples annealed in an air/O2 sequence resulting in the most stoichiometric monoclinic structures. A defect sensitivity factor was proposed to explain the nature of defects whether they are deep or shallow. Mott-Schottky analysis was used to confirm the expected defect donor densities, as well as to confirm the nature of the developed oxygen vacancy defect states. The tungstate photoanodes were tested in photoelectrochemical water splitting cells and their photoconversion efficiency was demonstrated and discussed in detail. 2016 the Owner Societies.
اللغةen
الناشرRoyal Society of Chemistry
الموضوعTungsten Oxides
Electrochromic Devices
Lithium Perchlorates
العنوانOn the nature of defect states in tungstate nanoflake arrays as promising photoanodes in solar fuel cells
النوعArticle
الصفحات22217-22223
رقم العدد32
رقم المجلد18
dc.accessType Abstract Only


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