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Structural evolution induced by Au atom diffusion in Ag2S

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Abstract

Atom diffusion processes govern the structure and composition of core–shell nanomaterial, which play a crucial role in determining their properties. By using aberration-corrected high-resolution transmission electron microscopy and X-ray absorption near-edge structure spectroscopy in combination with in situ X-ray diffraction, we confirm that single-atom diffusion of Au to Ag2S occurs, and that the transition from the Au@Ag2S core–shell nanostructure to AuAgS–AuAgx or Ag3AuS2–AuAgx heterostructures was observed. Moreover, the phase of the ternary sulfide induced by Au single-atom diffusion in Ag2S is determined by the ratio of Au and Ag, thus exhibiting a significant difference in the photocatalytic activity performance.

Graphical abstract: Structural evolution induced by Au atom diffusion in Ag2S

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Publication details

The article was received on 30 Sep 2019, accepted on 07 Oct 2019 and first published on 07 Oct 2019


Article type: Communication
DOI: 10.1039/C9CC07660C
Chem. Commun., 2019, Advance Article

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    Structural evolution induced by Au atom diffusion in Ag2S

    B. Jin, F. Zhang, G. Wu, T. Yuan, Q. Wang, H. Zhou, Y. Zhao, G. Zhang and X. Hong, Chem. Commun., 2019, Advance Article , DOI: 10.1039/C9CC07660C

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