論文

2018年7月16日

A Cocatalyst that Stabilizes a Hydride Intermediate during Photocatalytic Hydrogen Evolution over a Rhodium-Doped TiO<inf>2</inf> Nanosheet

Angewandte Chemie - International Edition
  • Shintaro Ida
  • ,
  • Kenta Sato
  • ,
  • Tetsuya Nagata
  • ,
  • Hidehisa Hagiwara
  • ,
  • Motonori Watanabe
  • ,
  • Namhoon Kim
  • ,
  • Yoshihito Shiota
  • ,
  • Michio Koinuma
  • ,
  • Sakae Takenaka
  • ,
  • Takaaki Sakai
  • ,
  • Elif Ertekin
  • ,
  • Tatsumi Ishihara

57
開始ページ
9073
終了ページ
9077
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.1002/anie.201803214

? 2018 Wiley-VCH Verlag GmbH &amp; Co. KGaA, Weinheim The hydrogen evolution reaction using semiconductor photocatalysts has been significantly improved by cocatalyst loading. However, there are still many speculations regarding the actual role of the cocatalyst. Now a photocatalytic hydrogen evolution reaction pathway is reported on a cocatalyst site using TiO2 nanosheets doped with Rh at Ti sites as one-atom cocatalysts. A hydride species adsorbed on the one-atom Rh dopant cocatalyst site was confirmed experimentally as the intermediate state for hydrogen evolution, which was consistent with the results of density functional theory (DFT) calculations. In this system, the role of the cocatalyst in photocatalytic hydrogen evolution is related to the withdrawal of photo-excited electrons and stabilization of the hydride intermediate species; the presence of oxygen vacancies induced by Rh facilitate the withdrawal of electrons and stabilization of the hydride.

リンク情報
DOI
https://doi.org/10.1002/anie.201803214
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/29766627
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85049779105&origin=inward

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