Aerosol Synthesis of Nanoparticles for Deposition of Catalytic Layers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F21%3A00549067" target="_blank" >RIV/61388998:_____/21:00549067 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.hydrogendays.cz/2021/" target="_blank" >http://www.hydrogendays.cz/2021/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Aerosol Synthesis of Nanoparticles for Deposition of Catalytic Layers

Popis výsledku v původním jazyce

We use an aerosol-based nanoparticle synthesis process to produce metallic nanoparticles for applications in catalysis. The method is based on a spark discharge generator (SDG), which allows us to evaporate a solid metal rod and to mix the metallic vapor with a carrier gas to achieve a rapid condensation of metallic vapors. Platinum nanoparticles of 5 nm average diameter can be produced at a production rate of grams per day by a typical SDG. Direct deposition of the SDG nanoparticles on a gas diffusion layer enables us to make gas diffusion electrodes for hydrogen fuel cells in a simple one-step process. The gas diffusion electrodes utilizing the SDG platinum catalyst nanoparticles were used to prepare membrane electrode nassemblies (MEA) by a standard hot-pressing procedure. The performance of MEAs was measured in a laboratory fuel cell with a 5 cm2 active area. Reference MEAs were prepared by a conventional blade-coating process of the catalyst ink (using Pt/C HiSpec 3000 catalyst) onto a gas diffusion layer, followed by the hot-pressing step. By using the standard Nafion HP membrane in both cases, we were able to directly compare the performance of the SDG catalyst layer vs. the reference blade-coated catalyst layer under real-world fuel cell operating conditions. Moreover, cyclic voltammetry has been employed to characterize the electrochemically active surface area of the two types of catalytic layers. The SDG catalytic layers show promising performance results and may represent a viable alternative to commercial electrodes for hydrogen fuel cell applications.

Název v anglickém jazyce

Aerosol Synthesis of Nanoparticles for Deposition of Catalytic Layers

Popis výsledku anglicky

We use an aerosol-based nanoparticle synthesis process to produce metallic nanoparticles for applications in catalysis. The method is based on a spark discharge generator (SDG), which allows us to evaporate a solid metal rod and to mix the metallic vapor with a carrier gas to achieve a rapid condensation of metallic vapors. Platinum nanoparticles of 5 nm average diameter can be produced at a production rate of grams per day by a typical SDG. Direct deposition of the SDG nanoparticles on a gas diffusion layer enables us to make gas diffusion electrodes for hydrogen fuel cells in a simple one-step process. The gas diffusion electrodes utilizing the SDG platinum catalyst nanoparticles were used to prepare membrane electrode nassemblies (MEA) by a standard hot-pressing procedure. The performance of MEAs was measured in a laboratory fuel cell with a 5 cm2 active area. Reference MEAs were prepared by a conventional blade-coating process of the catalyst ink (using Pt/C HiSpec 3000 catalyst) onto a gas diffusion layer, followed by the hot-pressing step. By using the standard Nafion HP membrane in both cases, we were able to directly compare the performance of the SDG catalyst layer vs. the reference blade-coated catalyst layer under real-world fuel cell operating conditions. Moreover, cyclic voltammetry has been employed to characterize the electrochemically active surface area of the two types of catalytic layers. The SDG catalytic layers show promising performance results and may represent a viable alternative to commercial electrodes for hydrogen fuel cell applications.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

<a href="/cs/project/TM01000018" target="_blank" >TM01000018: Vývoj účinných katalytických materiálů a odolných bipolárních desek pro automatizaci výroby svazků vodíkových palivových článků</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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