Preparation of complex model electrocatalysts in ultra-high vacuum and transfer into the electrolyte for electrochemical IR spectroscopy and other techniques

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Faisal F, Bertram M, Stumm C, Waidhas F, Brummel O, Libuda J
Zeitschrift: Review of Scientific Instruments
Verlag: AMER INST PHYSICS
Jahr der Veröffentlichung: 2018
Band: 89
Heftnummer: 11
ISSN: 0034-6748
eISSN: 1089-7623


Abstract

Model studies at complex, yet well-defined electrodes can provide a better understanding of electrocatalytic reactions. New experimental devices are required to prepare such model electrocatalysts with atomic-level control. In this work, we discuss the design of a new setup, which enables the preparation of well-defined electrocatalysts in ultra-high vacuum (UHV) using the full portfolio of surface science techniques. The setup allows for direct transfer of samples from UHV and the immersion into the electrolyte without contact to air. As a special feature, the single crystal sample is transferred without any sample holder, which makes the system easily compatible with most electrochemical in situ methods, specifically with electrochemical infrared reflection absorption spectroscopy, but also with other characterization methods such as single-crystal cyclic voltammetry, differential electrochemical mass spectrometry, or electrochemical scanning tunneling microscopy. We demonstrate the preparation in UHV, the transfer in inert atmosphere, and the immersion into the electrolyte for a complex model catalyst that requires surface science methods for preparation. Specifically, we study Pt nanoparticles supported on well-ordered Co3O4(111) films which are grown on an Ir(100) single crystal. In comparison with reference experiments on Pt(111), the model catalyst shows a remarkably different adsorption and reaction behavior during CO electrooxidation in alkaline environments. Published by AIP Publishing.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Bertram, Manon
Lehrstuhl für Physikalische Chemie II
Brummel, Olaf Dr.
Lehrstuhl für Physikalische Chemie II
Faisal, Firas
Lehrstuhl für Physikalische Chemie II
Libuda, Jörg Prof. Dr.
Professur für Physikalische Chemie
Stumm, Corinna
Lehrstuhl für Physikalische Chemie II
Waidhas, Fabian
Lehrstuhl für Physikalische Chemie II


Zitierweisen

APA:
Faisal, F., Bertram, M., Stumm, C., Waidhas, F., Brummel, O., & Libuda, J. (2018). Preparation of complex model electrocatalysts in ultra-high vacuum and transfer into the electrolyte for electrochemical IR spectroscopy and other techniques. Review of Scientific Instruments, 89(11). https://dx.doi.org/10.1063/1.5047056

MLA:
Faisal, Firas, et al. "Preparation of complex model electrocatalysts in ultra-high vacuum and transfer into the electrolyte for electrochemical IR spectroscopy and other techniques." Review of Scientific Instruments 89.11 (2018).

BibTeX: 

Zuletzt aktualisiert 2019-20-02 um 08:23