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Synergetic Effect of Dual Co‐catalysts on the Activity of p ‐Type Cu 2 O Crystals with Anisotropic Facets
Author(s) -
Li Rengui,
Tao Xiaoping,
Chen Ruotian,
Fan Fengtao,
Li Can
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201502562
Subject(s) - photocatalysis , redox , anisotropy , materials science , catalysis , isotropy , reduction (mathematics) , crystal (programming language) , chemical engineering , electron , chemistry , physics , optics , geometry , computer science , organic chemistry , mathematics , quantum mechanics , metallurgy , programming language , engineering
Spatial separation of reduction sites and oxidation sites to inhibit the recombination of photogenerated electrons and holes plays a vital role in improving the efficiency of photocatalyst systems. It is very challenging to rationally deposit cocatalysts on the right facets (sites), namely, the reduction cocatalyst on the reduction facets (sites) and the oxidation cocatalyst on the oxidation facets (sites). Herein, we report that the reduction and oxidation cocatalysts can be selectively constructed on the different facets of p ‐type Cu 2 O crystals with anisotropic facets, but not on the Cu 2 O crystal with isotropic facets. The deposition of dual cocatalysts on the different facets resulted in a remarkable synergetic effect in the photocatalytic performance, which could be attributed to the spatial separation of the photogenerated charges between facets. Our work reports an instructive strategy for constructing high‐efficiency photocatalyst systems for solar energy conversion.