DataVXACS Energy LettersPaper
journal article·2021-08-13

Imaging Heterogeneous Electrocatalyst Stability and Decoupling Degradation Mechanisms in Operating Hydrogen Fuel Cells

Isaac Martens, Antonis Vamvakeros, Nicolas Martinez, Raphaël Chattot, Janne Pusa, Maria Valeria Blanco, Elizabeth A. Fisher, Tristan Asset, Sylvie Escribano, Fabrice Micoud, Tim Starr, Alan Coelho, Veijo Honkimäki, Dan Bizzotto, David P. Wilkinson, Simon D. M. Jacques, Frédéric Maillard, Laetitia Dubau, Sandrine Lyonnard, Arnaud Morin, Jakub Drnec

ACS Energy Letters· Volume 6· Issue 8
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Source abstract

Abstract

The proliferation of hydrogen fuel cell systems is hindered by a degradation of the platinum catalyst. Here, we provide a device-level assessment of the catalyst degradation phenomena and its coupling to nanoscale hydration gradients, using advanced operando X-ray scattering tomography tailored for device-scale imaging. Gradients formed inside the fuel cell produce a heterogeneous degradation of the catalyst nanostructure, which can be linked to the flow field design and water distribution in the cell. Striking differences in catalyst degradation are observed between operating fuel cell devices and the liquid cell routinely used for catalyst stability studies, highlighting the crucial impact of the complex operating environment on the catalyst degradation phenomena. This degradation knowledge gap accentuates the necessity of multimodal, in situ characterization of real devices when assessing the performance and durability of electrocatalysts and, more generally, electrochemically active phases used in energy conversion and storage technologies.
Source: openalex_inverted_index · Quality: baseline

Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advancements in Solid Oxide Fuel Cells

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

European Synchrotron Radiation Facility, 71 Avenue des Martyrs, 38000 Grenoble, France

Advanced Materials and Process Engineering Laboratory, Department of Chemistry, University of British Columbia, V6T 1Z4 Vancouver, Canada

Department of Chemistry, University College London, WC1H 0AJ London, U.K.

Finden Limited, Merchant House, 5 East Saint Helens Street, OX14 5EG Abingdon, U.K.

Université Grenoble Alpes, CEA, 17 Avenue des Martyrs, F-38000 Grenoble, France

Université Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, Grenoble INP, LEPMI, 38610 Grenoble, France

Independent Researcher, 6380 St. Johann im Tirol, Austria

Coelho Software, 72 Cedar Street, Wynnum, QLD 4178 Brisbane, Australia

Department of Chemical and Biological Engineering, University of British Columbia, V6T 1Z3 Vancouver, Canada

Université Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, F-38054 Grenoble, France

Funding

Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada · Horizon 2020 Framework Programme · Automotive Partnership Canada · Institut Carnot Energies du Futur

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