DataVXACS Energy LettersPaper
journal article·2024-10-11

Origins of Nanoalloy Catalysts Degradation during Membrane Electrode Assembly Fabrication

Michal Ronovský, Olivia Dunseath, Tomáš Hrbek, Peter Kúš, Matija Gatalo, Shlomi Polani, Jan Kubát, Daniel Götz, Hridya Nedumkulam, Andrea Sartori, Enrico Petrucco, Francisco Ruiz-Zepeda, Nejc Hodnik, Alex Martinez Bonastre, Peter Strasser, Jakub Drnec

ACS Energy Letters· Volume 9· Issue 10
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Source abstract

Abstract

Despite extensive efforts to reduce the costs of high-performance electrochemical devices, incorporating catalyst materials frequently falls short of achieving performance targets. Platinum alloys, known for their high oxygen reduction activity, exemplify this challenge due to integration difficulties. Here, we introduce an in situ X-ray diffraction approach to investigate structural changes in PtCo and PtNi catalysts during ink preparation. Contrary to previous assumptions that acidity is the main factor driving catalyst dissolution, our findings demonstrate that temperature plays a more critical role. Additionally, we observe rapid structural degradation during the hot-pressing of catalyst-coated membranes (CCMs), a critical yet often unavoidable processing step. These results indicate that significant catalyst deactivation can occur before operation, emphasizing the need for optimized fabrication processes. This study highlights the importance of refining ink formulation and processing protocols to fully leverage advanced materials in CCM-based energy conversion systems.
Source: openalex_inverted_index · Quality: baseline

Research context

Metals & alloysNanomaterialsCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Catalytic Processes in Materials Science

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

Affiliations

ID31 Beamline, ESRF−The European Synchrotron, 38000 Grenoble, France

Electrochemical Energy, Catalysis and Material Science Laboratory, Department of Chemistry, Technical University Berlin, 10623 Berlin, Germany

Johnson Matthey Technology Centre, Blount’s Court, Sonning Common, Reading RG4 9NH, U.K.

Faculty of Mathematics and Physics, Department of Surface and Plasma Science, Charles University, V Holešovičkách 2, 18000 Prague, Czech Republic

Laboratory for Electrocatalysis, National Institute of Chemistry, Hajdrihova Ulica 19, 1000 Ljubljana, Slovenia

ReCatalyst, Hajdrihova Ulica 19, 1000 Ljubljana, Slovenia

Independent Researcher, 10000 Prague, Czech Republic

Funding

European Research Council · Javna Agencija za Raziskovalno Dejavnost RS · HORIZON EUROPE European Innovation Council · H2020 Marie Sklodowska-Curie Actions

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