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Lu, Kang-Qiang; Li, Yue-Hua; Zhang, Fan; Qi, Ming-Yu; Chen, Xue; Tang, Zi-Rong; Yamada, Yoichi M. A.; Anpo, Masakazu; Conte, Marco; Xu, Yi-Jun
Nature communications, 10/2020, Letnik: 11, Številka: 1Journal Article
Abstract The performance of transition metal hydroxides, as cocatalysts for CO 2 photoreduction, is significantly limited by their inherent weaknesses of poor conductivity and stacked structure. Herein, we report the rational assembly of a series of transition metal hydroxides on graphene to act as a cocatalyst ensemble for efficient CO 2 photoreduction. In particular, with the Ru-dye as visible light photosensitizer, hierarchical Ni(OH) 2 nanosheet arrays-graphene (Ni(OH) 2 -GR) composites exhibit superior photoactivity and selectivity, which remarkably surpass other counterparts and most of analogous hybrid photocatalyst system. The origin of such superior performance of Ni(OH) 2 -GR is attributed to its appropriate synergy on the enhanced adsorption of CO 2 , increased active sites for CO 2 reduction and improved charge carriers separation/transfer. This work is anticipated to spur rationally designing efficient earth-abundant transition metal hydroxides-based cocatalysts on graphene and other two-dimension platforms for artificial reduction of CO 2 to solar chemicals and fuels.
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