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Near infrared-light responsive WS2 microengines with high-performance electro- and photo-catalytic activities

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Abstract

Tungsten disulfide (WS2)-based micromotors with enhanced electrochemical and photo-catalytic activities are synthesized using a greatly simplified electrochemical deposition protocol at room temperature involving exclusively tungstic acid and sulfate as metal and sulfur sources without further building chemistry. The WS2-based micromotors exhibit dual electrochemical and photo-catalytic behavior in the inner and outer layers, respectively, due to the combination of the unique properties of the sp2 hybridized WS2 outer layer with highly reactive WS2-induced inner catalytic layers, accounting for this material's exclusive enhanced performances. A rough inner Pt–Ni layer allows tailoring the micromotor propulsion, with a speed increase of up to 1.6 times after external control of the micromotor with a magnetic field due to enhanced fuel accessibility. Such a coupling of the attractive capabilities of WS2 with enhanced micromotor movement holds considerable promise to address the growing energy crisis and environmental pollution concerns.

Graphical abstract: Near infrared-light responsive WS2 microengines with high-performance electro- and photo-catalytic activities

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Publication details

The article was received on 26 Jun 2019, accepted on 26 Oct 2019 and first published on 28 Oct 2019


Article type: Edge Article
DOI: 10.1039/C9SC03156A
Chem. Sci., 2019, Advance Article
  • Open access: Creative Commons BY license
    All publication charges for this article have been paid for by the Royal Society of Chemistry

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    Near infrared-light responsive WS2 microengines with high-performance electro- and photo-catalytic activities

    V. D. L. Asunción-Nadal, B. Jurado-Sánchez, L. Vázquez and A. Escarpa, Chem. Sci., 2019, Advance Article , DOI: 10.1039/C9SC03156A

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