Enhanced Catalytic Activity of Pt Nanostructured Electrodes Deposited by Spark Ablation for Proton Exchange Membrane Fuel Cells

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F25%3A00617984" target="_blank" >RIV/61388998:_____/25:00617984 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/25:00617984

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acsami.4c22587" target="_blank" >https://pubs.acs.org/doi/10.1021/acsami.4c22587</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsami.4c22587" target="_blank" >10.1021/acsami.4c22587</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Enhanced Catalytic Activity of Pt Nanostructured Electrodes Deposited by Spark Ablation for Proton Exchange Membrane Fuel Cells

Popis výsledku v původním jazyce

Catalyst layers play a crucial role in determining the performance of proton exchange membrane fuel cells (PEMFCs). However, the deposition of catalystnlayers poses challenges in PEMFC stack production due to the complexity of the fabrication steps. Herein, we present a simplified approach to synthesize Ptnnanostructures via spark ablation and simultaneously deposit them onto gas diffusion layers (GDL). The in situ deposited catalyst layers on GDL serve as electrodes fornmembrane electrode assembly (MEA) fabrication. Moreover, the carrier gas in the spark ablation process significantly influences the nucleation and growth of the Ptnnanostructures. Pt nanostructures produced in forming gas (Pt_FG, 95% nitrogen, and 5% hydrogen) exhibit dendritic morphology distinct from those obtained in purenN2 (Pt_N2). Investigating the catalytic activity of Pt synthesized in different carrier gases reveals that the Pt_FG catalyst demonstrates enhanced half-wave potential, massnactivity, and durability compared to those of Pt_N2 and commercial Pt-black catalysts. Single-cell measurements evaluate the electrocatalytic activity of the ionomer-free, in situ deposited catalyst layers. The Pt_FG MEA (0.2 mgPt cm−2) achieves a power density of 1285 mW cm−2 at 70 °C, 200 kPa, approximately 1.8 and 2 times higher than Pt_N2 and Pt-black MEAs, respectively. Further reduction of the catalyst loading to 0.1 mgPt cm−2 results in the Pt_FG MEA delivering 961 mW cm−2, indicating enhanced catalytic activity and Pt utilization efficiency. This study provides insights into fabricating catalytic layers using a facile strategy, circumventing the need for catalyst synthesis, ink formation, and electrode coating techniques.

Název v anglickém jazyce

Enhanced Catalytic Activity of Pt Nanostructured Electrodes Deposited by Spark Ablation for Proton Exchange Membrane Fuel Cells

Popis výsledku anglicky

Catalyst layers play a crucial role in determining the performance of proton exchange membrane fuel cells (PEMFCs). However, the deposition of catalystnlayers poses challenges in PEMFC stack production due to the complexity of the fabrication steps. Herein, we present a simplified approach to synthesize Ptnnanostructures via spark ablation and simultaneously deposit them onto gas diffusion layers (GDL). The in situ deposited catalyst layers on GDL serve as electrodes fornmembrane electrode assembly (MEA) fabrication. Moreover, the carrier gas in the spark ablation process significantly influences the nucleation and growth of the Ptnnanostructures. Pt nanostructures produced in forming gas (Pt_FG, 95% nitrogen, and 5% hydrogen) exhibit dendritic morphology distinct from those obtained in purenN2 (Pt_N2). Investigating the catalytic activity of Pt synthesized in different carrier gases reveals that the Pt_FG catalyst demonstrates enhanced half-wave potential, massnactivity, and durability compared to those of Pt_N2 and commercial Pt-black catalysts. Single-cell measurements evaluate the electrocatalytic activity of the ionomer-free, in situ deposited catalyst layers. The Pt_FG MEA (0.2 mgPt cm−2) achieves a power density of 1285 mW cm−2 at 70 °C, 200 kPa, approximately 1.8 and 2 times higher than Pt_N2 and Pt-black MEAs, respectively. Further reduction of the catalyst loading to 0.1 mgPt cm−2 results in the Pt_FG MEA delivering 961 mW cm−2, indicating enhanced catalytic activity and Pt utilization efficiency. This study provides insights into fabricating catalytic layers using a facile strategy, circumventing the need for catalyst synthesis, ink formation, and electrode coating techniques.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

<a href="/cs/project/TM03000034" target="_blank" >TM03000034: Vývoj vysoce výkonné elektrické lodi s rozšířeným dojezdem</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

ACS Applied Materials and Interfaces

ISSN

1944-8244

e-ISSN

1944-8252

Svazek periodika

17

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

17295-17306

Kód UT WoS článku

001437955400001

EID výsledku v databázi Scopus

2-s2.0-105001063476