Kurashige Wataru, Mori Yutaro, Ozaki Shuhei, Kawachi Masanobu, Hossain Sakiat, Kawawaki Tokuhisa, Shearer Cameron J, Iwase Akihide, Metha Gregory F, Yamazoe Seiji, Kudo Akihiko, Negishi Yuichi
Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan.
Research Institute for Science & Technology, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan.
Angew Chem Int Ed Engl. 2020 Apr 27;59(18):7076-7082. doi: 10.1002/anie.201916681. Epub 2020 Mar 6.
The activity of many water-splitting photocatalysts could be improved by the use of Rh -Cr mixed oxide (Rh Cr O ) particles as cocatalysts. Although further improvement of water-splitting activity could be achieved if the size of the Rh Cr O particles was decreased further, it is difficult to load ultrafine (<2 nm) Rh Cr O particles onto a photocatalyst by using conventional loading methods. In this study, a new loading method was successfully established and was used to load Rh Cr O particles with a size of approximately 1.3 nm and a narrow size distribution onto a BaLa Ti O photocatalyst. The obtained photocatalyst exhibited an apparent quantum yield of 16 %, which is the highest achieved for BaLa Ti O to date. Thus, the developed loading technique of Rh Cr O particles is extremely effective at improving the activity of the water-splitting photocatalyst BaLa Ti O . This method is expected to be extended to other advanced water-splitting photocatalysts to achieve higher quantum yields.
通过使用Rh -Cr混合氧化物（Rh Cr O ）颗粒作为助催化剂，可以提高许多光解水催化剂的活性。如果能进一步减小Rh Cr O 颗粒的尺寸，水分解活性有望得到进一步提高，但使用传统负载方法很难将超细（<2 nm）的Rh Cr O 颗粒负载到光催化剂上。在本研究中，成功建立了一种新的负载方法，并用于将尺寸约为1.3 nm且尺寸分布狭窄的Rh Cr O 颗粒负载到BaLa Ti O 光催化剂上。所得光催化剂的表观量子产率为16%，这是迄今为止BaLa Ti O 所达到的最高值。因此，所开发的Rh Cr O 颗粒负载技术在提高光解水光催化剂BaLa Ti O 的活性方面极其有效。该方法有望推广到其他先进的光解水光催化剂上，以实现更高的量子产率。
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