Metal Core–Shell Nanoparticle Supercrystals: From Photoactivation of Hydrogen Evolution to Photocorrosion - Sorbonne Université Access content directly
Journal Articles Advanced Materials Year : 2023

Metal Core–Shell Nanoparticle Supercrystals: From Photoactivation of Hydrogen Evolution to Photocorrosion

Abstract

Gas nanobubbles are directly linked to many important chemical reactions. While they can be detrimental to operational devices, they also reflect the local activity at the nanoscale. Here, supercrystals made of highly monodisperse Ag@Pt core–shell nanoparticles are first grown onto a solid support and fully characterized by electron microscopies and X‐ray scattering. Supercrystals are then used as a plasmonic photocatalytic platform for triggering the hydrogen evolution reaction. The catalytic activity is measured operando at the single supercrystal level by high‐resolution optical microscopy, which allows gas nanobubble nucleation to be probed at the early stage with high temporal resolution and the amount of gas molecules trapped inside them to be quantified. Finally, a correlative microscopy approach and high‐resolution electron energy loss spectroscopy help to decipher the mechanisms at the origin of the local degradation of the supercrystals during catalysis, namely nanoscale erosion and corrosion.
Fichier principal
Vignette du fichier
Draft_VF.pdf (9.95 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-04300466 , version 1 (22-11-2023)

Identifiers

Cite

Yinan Fan, Michael Walls, Caroline Salzemann, Jean‐Marc Noël, Frédéric Kanoufi, et al.. Metal Core–Shell Nanoparticle Supercrystals: From Photoactivation of Hydrogen Evolution to Photocorrosion. Advanced Materials, 2023, 35 (45), ⟨10.1002/adma.202305402⟩. ⟨hal-04300466⟩
15 View
10 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More