Magnetron-sputtered thin-film catalyst with low-Ir-Ru content for water electrolysis: Long-term stability and degradation analysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10467294" target="_blank" >RIV/00216208:11320/23:10467294 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=dImBrnmzVQ" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=dImBrnmzVQ</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jpowsour.2022.232375" target="_blank" >10.1016/j.jpowsour.2022.232375</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetron-sputtered thin-film catalyst with low-Ir-Ru content for water electrolysis: Long-term stability and degradation analysis

Popis výsledku v původním jazyce

Proton Exchange Membrane Water Electrolyzers (PEM-WEs) are entering the phase of commercial mass production. However, the issue of an iridium catalyst for the anode remains. This work presents an iridium-ruthenium-based catalyst (25% Ir = 158 mu g cm(-2), 75% Ru) prepared as a thin film on the surface-enhanced-anode of PEM-WE via magnetron sputtering. Using a strictly practical single-cell approach, we show its excellent activity - 1 A cm(-2) at 1.606 V, 80 degrees C, and stability - 1.3 mu V h(-1) at 1 A cm(-2) over the period of 500 h. Together with a purely Ir-based catalyst (158 mu g cm(-2)), we subject it to a massive electrochemical and material analysis, showing that the thickness and interconnectivity are essential for the catalyst&apos;s stability. Consequently, we believe that magnetron sputtering is currently the most perspective method for preparing low-Ir-loading catalysts. Compared to the nanoparticle approach, it allows the creation of very thin films with unprecedented interconnectivity.

Název v anglickém jazyce

Magnetron-sputtered thin-film catalyst with low-Ir-Ru content for water electrolysis: Long-term stability and degradation analysis

Popis výsledku anglicky

Proton Exchange Membrane Water Electrolyzers (PEM-WEs) are entering the phase of commercial mass production. However, the issue of an iridium catalyst for the anode remains. This work presents an iridium-ruthenium-based catalyst (25% Ir = 158 mu g cm(-2), 75% Ru) prepared as a thin film on the surface-enhanced-anode of PEM-WE via magnetron sputtering. Using a strictly practical single-cell approach, we show its excellent activity - 1 A cm(-2) at 1.606 V, 80 degrees C, and stability - 1.3 mu V h(-1) at 1 A cm(-2) over the period of 500 h. Together with a purely Ir-based catalyst (158 mu g cm(-2)), we subject it to a massive electrochemical and material analysis, showing that the thickness and interconnectivity are essential for the catalyst&apos;s stability. Consequently, we believe that magnetron sputtering is currently the most perspective method for preparing low-Ir-loading catalysts. Compared to the nanoparticle approach, it allows the creation of very thin films with unprecedented interconnectivity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/EF18_046%2F0015962" target="_blank" >EF18_046/0015962: Laboratoř fyziky povrchů - Optická dráha pro výzkum materiálů II</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Power Sources

ISSN

0378-7753

e-ISSN

1873-2755

Svazek periodika

556

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

232375

Kód UT WoS článku

000892216800001

EID výsledku v databázi Scopus

2-s2.0-85142891850