Poly(amidoamine) dendrimer-protected Pt nanoparticles as a catalyst with ultra-low Pt loading for PEM water electrolysis

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43927932" target="_blank" >RIV/60461373:22310/23:43927932 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.electacta.2022.141737" target="_blank" >https://doi.org/10.1016/j.electacta.2022.141737</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.electacta.2022.141737" target="_blank" >10.1016/j.electacta.2022.141737</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Poly(amidoamine) dendrimer-protected Pt nanoparticles as a catalyst with ultra-low Pt loading for PEM water electrolysis

Popis výsledku v původním jazyce

Carbon-supported Pt-based electrocatalysts have been widely used on the cathode in proton-exchange membrane water electrolyser (PEM WE) for efficient H2 production. Graphitized carbon supports provide high electrical conductivity to catalyst layer and immobilize Pt nanoparticles (NPs), delivering high current densities (1 to 3 A cm−2) with durability during operation under acidic environment. However, use of Pt loadings as high as ∼20 and ∼40 wt.% in carbon support are detrimental for large-scale H2 production. In this work, PEM water electrolysis was performed using a single-cell assembly, constructed using carbon-supported dendrimer-encapsulated Pt nanoparticles (Dend-PtNPs) as the cathode and Ir black as the anode. Main aim of this study was to prepare/encapsulate Pt NPs within the dendrimer (Dend) with different surface groups (COONa, -NH2, -OH) and various generations (G3-G6). This was done in order to target ultralow Pt loadings (1 to 2 wt% on carbon) and anchor the resulting Dend-PtNPs onto highly conductive multi-layered graphene (MLG) support using 1-ethyl-3-(3-dimethylamino propyl) carbodiimide (EDC) and N‑hydroxyl sulfoxuccinimide (NHS) as the cross-linking agents for efficient H2 evolution reaction (HER). The amount of cross-linking agents used for the synthesis of Dend-PtNPs were optimised to achieve optimal HER performance. The mass loading of Pt on MLG support was determined using ICP-OES spectrometry. The MLG/Dend-PtNPs prepared by carboxylate (COONa) surface groups showed the excellent HER performance at zero potential and smaller Tafel slope value of 35 mV dec−1. The PEM WE performance of commercial catalyst (40% Pt on C) was compared with as prepared MLG/Dend-PtNPs catalyst with 1 to 2 wt.% Pt loading.

Název v anglickém jazyce

Poly(amidoamine) dendrimer-protected Pt nanoparticles as a catalyst with ultra-low Pt loading for PEM water electrolysis

Popis výsledku anglicky

Carbon-supported Pt-based electrocatalysts have been widely used on the cathode in proton-exchange membrane water electrolyser (PEM WE) for efficient H2 production. Graphitized carbon supports provide high electrical conductivity to catalyst layer and immobilize Pt nanoparticles (NPs), delivering high current densities (1 to 3 A cm−2) with durability during operation under acidic environment. However, use of Pt loadings as high as ∼20 and ∼40 wt.% in carbon support are detrimental for large-scale H2 production. In this work, PEM water electrolysis was performed using a single-cell assembly, constructed using carbon-supported dendrimer-encapsulated Pt nanoparticles (Dend-PtNPs) as the cathode and Ir black as the anode. Main aim of this study was to prepare/encapsulate Pt NPs within the dendrimer (Dend) with different surface groups (COONa, -NH2, -OH) and various generations (G3-G6). This was done in order to target ultralow Pt loadings (1 to 2 wt% on carbon) and anchor the resulting Dend-PtNPs onto highly conductive multi-layered graphene (MLG) support using 1-ethyl-3-(3-dimethylamino propyl) carbodiimide (EDC) and N‑hydroxyl sulfoxuccinimide (NHS) as the cross-linking agents for efficient H2 evolution reaction (HER). The amount of cross-linking agents used for the synthesis of Dend-PtNPs were optimised to achieve optimal HER performance. The mass loading of Pt on MLG support was determined using ICP-OES spectrometry. The MLG/Dend-PtNPs prepared by carboxylate (COONa) surface groups showed the excellent HER performance at zero potential and smaller Tafel slope value of 35 mV dec−1. The PEM WE performance of commercial catalyst (40% Pt on C) was compared with as prepared MLG/Dend-PtNPs catalyst with 1 to 2 wt.% Pt loading.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/GJ20-21105Y" target="_blank" >GJ20-21105Y: Katalyzátor na bázi kovové slitiny chráněné dendrimerem a inkorporované do grafénu pro produkci vodíku v elektrolyzéru vody s polymerní membránou</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

ELECTROCHIMICA ACTA

ISSN

0013-4686

e-ISSN

1873-3859

Svazek periodika

441

Číslo periodika v rámci svazku

February

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

—

Kód UT WoS článku

000919650700001

EID výsledku v databázi Scopus

2-s2.0-85145662894