In:
Catalysis Science & Technology, Royal Society of Chemistry (RSC), Vol. 12, No. 18 ( 2022), p. 5687-5694
Abstract:
The surface modification of dual cocatalysts on a photocatalyst is believed to effectively promote the separation of photogenerated carriers in the CO 2 reduction reaction. Here, taking tetragonal BiVO 4 with a strain effect as a substrate photocatalyst which has been proven to have enhanced reduction ability, BiVO 4 modified with spatially separated dual cocatalysts Ag and MnO x is synthesized by a photo-deposition method for CO 2 photoreduction without sacrificial agents. Compared with individual Ag–BiVO 4 and MnO x –BiVO 4 , Ag–MnO x –BiVO 4 has improved activity for reduction of CO 2 to CO in a gas–solid system, which can be attributed to the spatially separated redox sites and enhanced photogenerated carrier separation efficiency. The optimal activity of the Ag–MnO x –BiVO 4 sample is 3.1 times that of the original BiVO 4 . In addition, PL and photoelectrochemical tests indicate that the dual cocatalysts can effectively inhibit carrier recombination and promote the photocatalytic reaction. This work reports a useful strategy for constructing a photocatalytic CO 2 reduction system based on a BiVO 4 photocatalyst.
Type of Medium:
Online Resource
ISSN:
2044-4753
,
2044-4761
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2595090-3
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