https://scholars.lib.ntu.edu.tw/handle/123456789/414323
標題: | Defect engineering of metal-oxide interface for proximity of photooxidation and photoreduction | 作者: | Zhou Y. Zhang Z. Fang Z. Qiu M. Ling L. Long J. Chen L. Tong Y. Su W. Zhang Y. Wu J.C.S. Basset J.-M. Wang X. Yu G. |
關鍵字: | defect engineering; metal-oxide interface; oxygen vacancy; photocatalyst; solar hydrogen production | 公開日期: | 2019 | 出版社: | National Academy of Sciences | 卷: | 116 | 期: | 21 | 起(迄)頁: | 10232-10237 | 來源出版物: | Proceedings of the National Academy of Sciences of the United States of America | 摘要: | Close proximity between different catalytic sites is crucial for accelerating or even enabling many important catalytic reactions. Photooxidation and photoreduction in photocatalysis are generally separated from each other, which arises from the hole-electron separation on photocatalyst surface. Here, we show with widely studied photocatalyst Pt/TiO2 as a model, that concentrating abundant oxygen vacancies only at the metal-oxide interface can locate hole-driven oxidation sites in proximity to electron-driven reduction sites for triggering unusual reactions. Solar hydrogen production from aqueous-phase alcohols, whose hydrogen yield per photon is theoretically limited below 0.5 through conventional reactions, achieves an ultrahigh hydrogen yield per photon of 1.28 through the unusual reactions. We demonstrated that such defect engineering enables hole-driven CO oxidation at the Pt- TiO2 interface to occur, which opens up room-temperature alcohol decomposition on Pt nanoparticles to H2 and adsorbed CO, accompanying with electron-driven proton reduction on Pt to H2 © 2019 National Academy of Sciences. All rights reserved. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85066121922&doi=10.1073%2fpnas.1901631116&partnerID=40&md5=565a33ff9513c250b9489693c856cf22 https://scholars.lib.ntu.edu.tw/handle/123456789/414323 |
ISSN: | 00278424 | DOI: | 10.1073/pnas.1901631116 | SDG/關鍵字: | alcohol; carbon monoxide; hydrogen; metal oxide; platinum nanoparticle; titanium dioxide; Article; chemical engineering; chemical interaction; controlled study; decomposition; density functional theory; oxidation reduction reaction; particle size; photocatalysis; photon; photooxidation; priority journal; room temperature; transmission electron microscopy; ultraviolet radiation |
顯示於: | 化學工程學系 |
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