2015年1月
Photocatalytic Reaction Centers in Two-Dimensional Titanium Oxide Crystals
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
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- 巻
- 137
- 号
- 1
- 開始ページ
- 239
- 終了ページ
- 244
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/ja509970z
- 出版者・発行元
- AMER CHEMICAL SOC
Co-catalysts play an important role in photocatalytic water splitting. The co-catalyst is generally deposited in the form of nanoparticles on the catalyst surface, and is believed to provide water oxidation and reduction sites. However, the minimum size of a co-catalyst that can function as a reaction site and the detailed local environment of the photocatalytic reaction centers are not yet fully understood. Here, we show that even isolated single-atom Rh dopants in two-dimensional titanium oxide crystals can effectively act as co-catalysts for the water-splitting reaction. At an optimal doping concentration, the hydrogen production rate is increased substantially in comparison to that found with the undoped crystals. We also present first-principles simulations based on density functional theory to provide insights into the atomic-scale mechanism by which the isolated Rh dopants induce changes to the dissociation reaction energy landscape. These results provide new insights for better understanding the role of the co-catalyst in the photocatalytic reaction.
- リンク情報
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- DOI
- https://doi.org/10.1021/ja509970z
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000348483500051&DestApp=WOS_CPL
- URL
- https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84921033475&origin=inward
- ID情報
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- DOI : 10.1021/ja509970z
- ISSN : 0002-7863
- Web of Science ID : WOS:000348483500051