Polyol Synthesis of Size-Controlled Rh Nanoparticles and Their Application to Photocatalytic Overall Water Splitting under Visible Light

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• 作者：Takahiro Ikeda ; Anke Xiong ; Taizo Yoshinaga ; Kazuhiko Maeda ; Kazunari Domen ; Toshiharu Teranishi
• 刊名：The Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：February 14, 2013
• 年：2013
• 卷：117
• 期：6
• 页码：2467-2473
• 全文大小：493K
• 年卷期：v.117,no.6(February 14, 2013)
• ISSN：1932-7455

文摘

A gradual size control of poly(N-vinyl-2-pyrrolidone)-protected Rh nanoparticles (PVP-Rh NPs) was successfully achieved in the range of 1.7鈥?.7 nm by tuning the pH value and the reaction temperature of the ethylene glycol (EG) solution; smaller NPs were formed at higher pH and at higher temperature. This trend can be interpreted by the change in the nucleation rate caused by tuning the pH value and/or the temperature of the solution. When the size tuned PVP-Rh NPs were applied for use as cocatalysts in a photocatalyst (solid solution of GaN and ZnO (Ga_1鈥?i>xZn_x)(N_1鈥?i>xO_x)) for overall water splitting under visible light, it was demonstrated that smaller Rh cores gave higher activity than the larger ones.