abstract

• The reduction mechanism and behaviors of HAuCl4 on the surface of edge-rich molybdenum disulfide (ER-MoS2) was explored based on atomic force microscopy (AFM) in this work. ER-MoS2 was prepared through a simple thermal modification process. It was found that edges on MoS2 could enhance the reduction ability of HAuCl4. There were large and plenty of gold particles on the edges, which was due to the high electrons transfer rate and transferred efficiency of photo-generated electrons-holes pairs. The light could facilitate the transfer of photo-electrons and then enhance the surface potential, thus promoting the reduction of HAuCl4 on it. The edges of ER-MoS2 could promote the reduction as well as growth of Au0. Furthermore, the new appearance of Au particles on edges had a strong influence on the surface potential of ER-MoS2. The work provided an insight view on the role of edge in the control and growth of noble metal nanoparticles on MoS2 substrate. © 2022

authors

• Jia F.
• López Valdivieso Alejandro
• Song S.

publication date

• 2022-01-01

funding provided via

• Consejo Nacional de Ciencia y Tecnología, CONACYT: 812586; National Key Research and Development Program of China, NKRDPC: 2021YFC2900900  Grant

published in

• Surfaces and Interfaces  Journal

keywords

• Edge-rich; HAuCl4; Molybdenum disulfide; Reduction

Digital Object Identifier (DOI)

• 10.1016/j.surfin.2022.102199

PubMed ID

start page

end page

volume

• 33

issue