de la Asunción-Nadal Víctor, Jurado-Sánchez Beatriz, Vázquez Luis, Escarpa Alberto
Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering , University of Alcalá , Alcala de Henares , Madrid , E-28871 , Spain . Email:
Chemical Research Institute "Andrés M. del Río" , University of Alcala , Alcala de Henares , Madrid , E-28871 , Spain.
Chem Sci. 2019 Oct 28;11(1):132-140. doi: 10.1039/c9sc03156a. eCollection 2020 Jan 7.
Tungsten disulfide (WS)-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 WS-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 sp hybridized WS outer layer with highly reactive WS-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 WS with enhanced micromotor movement holds considerable promise to address the growing energy crisis and environmental pollution concerns.
基于二硫化钨（WS）的微电机具有增强的电化学和光催化活性，它是在室温下通过一种大大简化的电化学沉积方法合成的，该方法仅使用钨酸和硫酸盐作为金属和硫源，无需进一步的复杂化学过程。由于sp杂化的WS外层与高活性WS诱导的内层催化层的独特性能相结合，基于WS的微电机在内层和外层分别表现出双重电化学和光催化行为，这解释了这种材料独特的增强性能。粗糙的内部Pt-Ni层可实现微电机推进的定制，在通过磁场对微电机进行外部控制后，由于燃料可及性增强，速度提高了1.6倍。WS的吸引人的性能与增强的微电机运动的这种结合，对于解决日益严重的能源危机和环境污染问题具有很大的前景。
