@article{6708f403b5db4df19b25abe9681109ed,
title = "Au25-Loaded BaLa4Ti4O15 Water-Splitting Photocatalyst with Enhanced Activity and Durability Produced Using New Chromium Oxide Shell Formation Method",
abstract = "We report herein remarkable improvement of activity and stability of an Au25-loaded BaLa4Ti4O15 water-splitting photocatalyst. We first examined the influence of refining the gold cocatalyst on the individual reactions over the BaLa4Ti4O15 photocatalyst in this water-splitting system. The results revealed that refining the gold cocatalyst accelerates not only the hydrogen generation reaction, but also oxygen photoreduction reaction, which suppresses the H2 generation via photoreduction of protons. This finding suggests that photocatalytic activity will be enhanced if the O2 photoreduction reaction can be selectively suppressed by covering Au25 with a Cr2O3 shell which is impermeable to O2 but permeable to H+. Then, we developed new method for the formation of the Cr2O3 shell onto Au25. Our method utilizes the strong metal-support interaction between them. Water-splitting photoactivity of Au25-BaLa4Ti4O15 was improved by 19 times under an optimized coverage of the Cr2O3 shell. The Cr2O3 shell also elongated the lifetime of the photocatalysts by preventing the agglomeration of Au25 cocatalysts.",
author = "Wataru Kurashige and Rina Kumazawa and Daiki Ishii and Rui Hayashi and Yoshiki Niihori and Sakiat Hossain and Nair, {Lakshmi V.} and Tomoaki Takayama and Akihide Iwase and Seiji Yamazoe and Tatsuya Tsukuda and Akihiko Kudo and Yuichi Negishi",
note = "Funding Information: We thank Yutaro Mori, Marika Aoki, Shunya Yoshino, and Taichi Tsuchiya for technical assistance and Yuki Koyama for drawing schematics. This work was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI (Grant Numbers JP16H04099, 17H05385, and 16K21402), and Scientific Research on Innovative Areas “All Nippon Artificial Photosynthesis Project for Living Earth (AnApple)” (Grant Numbers 15H00883 and 24107994). Funding from the Takahashi Industrial and Economic Research Foundation, Futaba Electronics Memorial Foundation, Iwatani Naoji Foundation, and Ube Industries Foundation is also gratefully acknowledged.",
year = "2018",
month = jun,
day = "28",
doi = "10.1021/acs.jpcc.8b00151",
language = "English",
volume = "122",
pages = "13669--13681",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "25",
}