Cu2ZnSnS4鈥揚tM (M = Co, Ni) Nanoheterostructures for Photocatalytic Hydrogen Evolution

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• 作者：Xuelian Yu ; Xiaoqiang An ; Aziz Gen莽 ; Maria Ib谩帽ez ; Jordi Arbiol ; Yihe Zhang ; Andreu Cabot
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：September 24, 2015
• 年：2015
• 卷：119
• 期：38
• 页码：21882-21888
• 全文大小：659K
• ISSN：1932-7455

文摘

We report the synthesis and photocatalytic and magnetic characterization of colloidal nanoheterostructures formed by combining a Pt-based magnetic metal alloy (PtCo, PtNi) with Cu₂ZnSnS₄ (CZTS). While CZTS is one of the main candidate materials for solar energy conversion, the introduction of a Pt-based alloy on its surface strongly influences its chemical and electronic properties, ultimately determining its functionality. In this regard, up to a 15-fold increase of the photocatalytic hydrogen evolution activity was obtained with CZTS鈥揚tCo when compared with CZTS. Furthermore, two times higher hydrogen evolution rates were obtained for CZTS鈥揚tCo when compared with CZTS鈥揚t, in spite of the lower precious metal loading of the former. Besides, the magnetic properties of the PtCo nanoparticles attached to the CZTS nanocrystals were retained in the heterostructures, which could facilitate catalyst purification and recovery for its posterior recycling and/or reutilization.