Journal
CHEMISTRY OF MATERIALS
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.2c01242
Keywords
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Funding
- Israel Science Foundation Center of Excellence
- Russell Berrie Nanotechnology Institute (RBNI)
- Nancy and Stephen Grand Technion Energy Program (GTEP)
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This paper reports the selective growth of nanowires with a special structure, which can improve the efficiency of photocatalytic reactions. The nanowires exhibit high photocatalytic H2 production rate and apparent quantum efficiency, paving the way for new applications.
One-dimensional (1D) semiconductor heterojunctions with asym-metric or symmetric metal cocatalysts are promising systems for high-performance photocatalytic reactions such as solar-to-fuel conversion as the heterostructure junction enables improved charge separation. However, synthesizing such unique heterostructures with well-designed non-noble-metal cocatalysts in an affordable and scalable manner remains a challenging task. Herein, we report the sequential selective growth of ternary dumbbells composed of IrSe2@MoSe2-CdS nanowires (TDNWs), in which clusters of an IrSe2 core coated with a MoSe2 shell are selectively grown on both ends of CdS nanowires (NWs). This special configuration contributes to efficient charge separation. With this unique structure, the TDNWs exhibit a photocatalytic H2 production rate of as high as 137 mmol/g h and an apparent quantum efficiency (AQE) of similar to 14.5% within 1 h, which is far superior to those of non-tipped CdS NWs and asymmetrical MoSe2-tipped CdS NWs (ANWs). Our facile synthetic strategy extends spatial anisotropic nanorod growth and enables the construction of advanced multifunctional nano-heterostructures, paving the path for new applications.
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