Atomic layer deposition for efficient oxygen evolution reaction at Pt/Ir catalyst layers

Beilstein Journal of Nanotechnology, vol. 11, pp. 952–959

Abstract

We provide a direct comparison of two distinct methods of Ti felt surface treatment and Pt/Ir electrocatalyst deposition for the positive electrode of regenerative fuel cells and vanadium–air redox flow batteries. Each method is well documented in the literature, and this paper provides a direct comparison under identical experimental conditions of electrochemical measurements and in identical units. In the first method, based on classical engineering, the bimetallic catalyst is deposited by dip-coating in a precursor solution of the salts followed by their thermal decomposition. In the alternative method, more academic in nature, atomic layer deposition (ALD) is applied to the felts after anodization. ALD allows for a controlled coating with ultralow noble-metal loadings in narrow pores. In acidic electrolyte, the ALD approach yields improved mass activity (557 A·g−1 as compared to 80 A·g−1 at 0.39 V overpotential) on the basis of the noble-metal loading, as well as improved stability.

Authors 7

1. Stefanie Schlicht

   Friedrich-Alexander-Universität Erlangen-Nürnberg

   Affiliation as printed

   Friedrich-Alexander-Universität Erlangen-Nürnberg, Chair 'Chemistry of Thin Film Materials', IZNF, Cauerstr. 3, 91058 Erlangen, Germany

   Friedrich-Alexander-Universität Erlangen-Nürnberg, Chair 'Chemistry of Thin Film Materials', IZNF, Cauerstr. 3, 91058 Erlangen, Germany,

2. Korcan Perçin Aachen DWI - Leibniz Institute for Interactive Materials

   DWI – Leibniz Institute for Interactive Materials

   Affiliation as printed

   DWI-Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, 52074 Aachen, Germany

   DWI-Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, 52074 Aachen, Germany,

3. Stefanie M. A. Kriescher Aachen

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University Aachener Verfahrenstechnik-Chemical Process Engineering, Forckenbeckstr. 51, 52074 Aachen, Germany

   RWTH Aachen University Aachener Verfahrenstechnik-Chemical Process Engineering, Forckenbeckstr. 51, 52074 Aachen, Germany,

4. André Hofer

   Friedrich-Alexander-Universität Erlangen-Nürnberg

   Affiliation as printed

   Friedrich-Alexander-Universität Erlangen-Nürnberg, Chair 'Chemistry of Thin Film Materials', IZNF, Cauerstr. 3, 91058 Erlangen, Germany

   Friedrich-Alexander-Universität Erlangen-Nürnberg, Chair 'Chemistry of Thin Film Materials', IZNF, Cauerstr. 3, 91058 Erlangen, Germany,

5. Claudia Weidlich

   Society for Chemical Engineering and Biotechnology · DECHEMA-Forschungsinstitut

   Affiliation as printed

   DECHEMA-Forschungsinstitut, Theodor-Heuss-Allee 25, 60486 Frankfurt am Main, Germany

   DECHEMA-Forschungsinstitut, Theodor-Heuss-Allee 25, 60486 Frankfurt am Main, Germany and

6. Matthias Weßling Aachen DWI - Leibniz Institute for Interactive Materials

   DWI – Leibniz Institute for Interactive Materials

   Affiliation as printed

   DWI-Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, 52074 Aachen, Germany

   DWI-Leibniz Institute for Interactive Materials, Forckenbeckstr. 50, 52074 Aachen, Germany,

7. Julien Bachmann corresponding

   St Petersburg University · Friedrich-Alexander-Universität Erlangen-Nürnberg

   Affiliation as printed

   Friedrich-Alexander-Universität Erlangen-Nürnberg, Chair 'Chemistry of Thin Film Materials', IZNF, Cauerstr. 3, 91058 Erlangen, Germany

   Saint Petersburg State University, Institute of Chemistry, Universitetskii pr. 26, 198504 St. Petersburg, Russia

   Friedrich-Alexander-Universität Erlangen-Nürnberg, Chair 'Chemistry of Thin Film Materials', IZNF, Cauerstr. 3, 91058 Erlangen, Germany,