The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Edvin Lundgren. Portrait.

Edvin Lundgren

Professor

Edvin Lundgren. Portrait.

Operando Reflectance Microscopy on Polycrystalline Surfaces in Thermal Catalysis, Electrocatalysis, and Corrosion

Author

  • Sebastian Pfaff
  • Alfred Larsson
  • Dmytro Orlov
  • Gary S Harlow
  • Giuseppe Abbondanza
  • Weronica Linpé
  • Lisa Rämisch
  • Sabrina M Gericke
  • Johan Zetterberg
  • Edvin Lundgren

Summary, in English

We have developed a microscope with a spatial resolution of 5 μm, which can be used to image the two-dimensional surface optical reflectance (2D-SOR) of polycrystalline samples in operando conditions. Within the field of surface science, operando tools that give information about the surface structure or chemistry of a sample under realistic experimental conditions have proven to be very valuable to understand the intrinsic reaction mechanisms in thermal catalysis, electrocatalysis, and corrosion science. To study heterogeneous surfaces in situ, the experimental technique must both have spatial resolution and be able to probe through gas or electrolyte. Traditional electron-based surface science techniques are difficult to use under high gas pressure conditions or in an electrolyte due to the short mean free path of electrons. Since it uses visible light, SOR can easily be used under high gas pressure conditions and in the presence of an electrolyte. In this work, we use SOR in combination with a light microscope to gain information about the surface under realistic experimental conditions. We demonstrate this by studying the different grains of three polycrystalline samples: Pd during CO oxidation, Au in electrocatalysis, and duplex stainless steel in corrosion. Optical light-based techniques such as SOR could prove to be a good alternative or addition to more complicated techniques in improving our understanding of complex polycrystalline surfaces with operando measurements.

Department/s

  • Combustion Physics
  • Synchrotron Radiation Research
  • NanoLund: Centre for Nanoscience
  • Materials Engineering

Publishing year

2021-04-28

Language

English

Pages

19530-19540

Publication/Series

ACS applied materials & interfaces

Volume

13

Issue

16

Document type

Journal article

Publisher

The American Chemical Society (ACS)

Topic

  • Materials Chemistry
  • Atom and Molecular Physics and Optics
  • Condensed Matter Physics (including Material Physics, Nano Physics)

Status

Published

Project

  • Combined techniques for studies of catalysis

ISBN/ISSN/Other

  • ISSN: 1944-8244