Cu2ZnSnS4-PtM (M = Co, Ni) nanoheterostructures for photocatalytic hydrogen evolution
Yu, Xuelian (Institut de Recerca en Energia de Catalunya)
An, Xiaoqiang (Chinese Academy of Sciences. Key Laboratory of Drinking Water Science and Technology)
Genç, Aziz (Institut Català de Nanociència i Nanotecnologia)
Ibáñez, Maria (Institut de Recerca en Energia de Catalunya)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Zhang, Yie (Chinese Academy of Sciences. Key Laboratory of Drinking Water Science and Technology)
Cabot, Andreu (Institució Catalana de Recerca i Estudis Avançats)

Data:	2015
Resum:	We report the synthesis and photocatalytic and magnetic characterization of colloidal nanoheterostructures formed by combining a Pt-based magnetic metal alloy (PtCo, PtNi) with CuZnSnS (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-PtCo when compared with CZTS. Furthermore, two times higher hydrogen evolution rates were obtained for CZTS-PtCo when compared with CZTS-Pt, 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.
Ajuts:	European Commission 284486 Ministerio de Ciencia e Innovación ENE2013-46624-C4-3-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-1638
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Matèria:	Candidate materials ; Hydrogen evolution rate ; Magnetic characterization ; Magnetic metals ; Nano-heterostructures ; Photo-catalytic ; Photocatalytic hydrogen evolution ; Pt-Co nanoparticles
Publicat a:	Journal of physical chemistry. C, Vol. 119, issue 38 (Sep. 2015) , p. 21882-21888, ISSN 1932-7455

DOI: 10.1021/acs.jpcc.5b06199

Preprint 23 p, 3.5 MB

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