Efficient photoredox conversion of alcohol to aldehyde and H2 by heterointerface engineering of bimetal–semiconductor hybrids

Controllable and precise design of bimetal– or multimetal–semiconductor nanostructures with efficient light absorption, charge separation and utilization is strongly desired for photoredox catalysis applications in solar energy conversion. Taking advantage of Au nanorods, Pt nanoparticles, and CdS a...

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Bibliographic Details
Published in:	Chemical science (Cambridge) 2019, Vol.10 (12), p.3514-3522
Main Authors:	Chuang, Han, Tang, Zi-Rong, Liu, Junxue, Jin, Shengye, Yi-Jun, Xu
Format:	Article
Language:	eng
Subjects:	Bimetals Catalytic activity Charge transfer Electric fields Electromagnetic absorption Gold Nanoparticles Nanorods Photoredox catalysis Platinum Solar energy conversion Spatial distribution
Online Access:	Get full text
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Summary:	Controllable and precise design of bimetal– or multimetal–semiconductor nanostructures with efficient light absorption, charge separation and utilization is strongly desired for photoredox catalysis applications in solar energy conversion. Taking advantage of Au nanorods, Pt nanoparticles, and CdS as the plasmonic metal, nonplasmonic co-catalyst and semiconductor respectively, we report a steerable approach to engineer the heterointerface of bimetal–semiconductor hybrids. We show that the ingredient composition and spatial distribution between the bimetal and semiconductor significantly influence the redox catalytic activity. CdS deposited anisotropic Pt-tipped Au nanorods, which feature improved light absorption, structure-enhanced electric field distribution and spatially regulated multichannel charge transfer, show distinctly higher photoactivity than blank CdS and other metal–CdS hybrids for simultaneous H2 and value-added aldehyde production from one redox cycle.
ISSN:	2041-6520 2041-6539