https://scholars.lib.ntu.edu.tw/handle/123456789/363153
Title: | A novel membrane reactor for separating hydrogen and oxygen in photocatalytic water splitting | Authors: | Yu, S.-C. Huang, C.-W. Liao, C.-H. Wu, J.C.S. Chang, S.-T. Chen, K.-H. JEFFREY CHI-SHENG WU |
Keywords: | Hydrogen; Membrane reactor; Photocatalysis; Photocatalytic water splitting; Renewable energy | Issue Date: | 2011 | Journal Volume: | 382 | Journal Issue: | 1-2 | Start page/Pages: | 291-299 | Source: | Journal of Membrane Science | Abstract: | The Z-scheme of water splitting is comprised of H2-photocatalyst and O2-photocatalyst with aid of electron transfer mediator to produce hydrogen and oxygen, respectively. A twin reactor, which divided H2-photocatalyst and O2-photocatalyst in two compartments using a membrane, can separate H2 and O2 thus preventing backward reaction. Pt/SrTiO3:Rh and BiVO4 were used as the H2-photocatalyst and the O2-photocatalyst, respectively. The diffusion of electron mediator, Fe2+/Fe3+, through Nafion membrane was investigated. The transfer rate of mediator ions was remarkably larger than the photoreaction rate, indicating that membrane did not delay the water-splitting reaction in the twin reactor. Under the favorable condition, the hydrogen generation rate reached 0.65μmol/gh and matched the H2/O2stoichiometric ratio of water splitting. We found that the generation of H2in the twin-reactor system was the rate-limiting step of the water-splitting reaction. By using the twin reactor, the deactivation of Pt/SrTiO3:Rh could be minimized due to the suppression of Fe(OH)3formation on the photocatalyst surface. © 2011 Elsevier B.V. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-80052735316&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/363153 |
DOI: | 10.1016/j.memsci.2011.08.022 | SDG/Keyword: | Backward reactions; Electron mediator; Electron transfer mediators; Favorable conditions; Hydrogen generations; Membrane reactor; Nafion membrane; Photocatalytic water splitting; Photoreactions; Rate-limiting steps; Renewable energies; Stoichiometric ratio; Transfer rates; Water splitting; Bioreactors; Hydrogen; Hydrogen production; Oxygen; Photocatalysis; Rhodium; Membranes; bismuth; bismuth vanadate; ferric ion; ferrous ion; hydrogen; iron oxide; oxygen; platinum; rhodium; strontium; strontium titanate; unclassified drug; vanadium; water; article; catalyst; chemical reaction; diffusion; electrochemistry; electron transport; membrane reactor; molecular weight; photocatalysis; photocatalyst; photocatalytic water splitting; photoreactivity; priority journal; scanning electron microscopy; separation technique; stoichiometry; transmission electron microscopy; X ray diffraction; X ray photoelectron spectroscopy |
Appears in Collections: | 化學工程學系 |
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