Tuning the morphology of sputter-deposited platinum catalyst: From compact layers to dispersed nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10468342" target="_blank" >RIV/00216208:11320/23:10468342 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=eaDhh2O5R8" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=eaDhh2O5R8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.surfin.2023.103079" target="_blank" >10.1016/j.surfin.2023.103079</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tuning the morphology of sputter-deposited platinum catalyst: From compact layers to dispersed nanoparticles

Popis výsledku v původním jazyce

A comprehensive study on adjusting the morphology of sputter-deposited platinum was performed. Platinum was deposited under various Ar pressure ranging from 0.3 to 3.2 Pa using a conventional magnetron system as well as at 57 Pa using a gas aggregation cluster source integrated into the magnetron sputtering system. The morphology and structure of deposited layers were characterized with a broad portfolio of characterization techniques such as scanning electron microscopy, transmission electron microscopy, grazing incidence small angle X-ray scattering and X-ray diffraction. The results revealed a continuous evolution of the Pt layer morphology from a thin-film-like layer of tightly packed Pt nanoparticles to a deposit composed of dispersed particles of 5-7 nm in size as the Ar pressure increased. The electrochemically active surface area of deposited Pt, as calculated from cyclic voltammograms, increased with deposition pressure from 11.7 m(2)center dot g(Pt)(-1) to 22.3 m(2)center dot g(Pt)(-1) and 24 m(2)center dot g(Pt)(-1) for Pt deposited at 0.3, 3.2 and 57 Pa, respectively. This increase in active sites was reflected in a significant improvement in the mass activity of platinum exemplary confirmed using a methanol electrooxidation reaction.

Název v anglickém jazyce

Tuning the morphology of sputter-deposited platinum catalyst: From compact layers to dispersed nanoparticles

Popis výsledku anglicky

A comprehensive study on adjusting the morphology of sputter-deposited platinum was performed. Platinum was deposited under various Ar pressure ranging from 0.3 to 3.2 Pa using a conventional magnetron system as well as at 57 Pa using a gas aggregation cluster source integrated into the magnetron sputtering system. The morphology and structure of deposited layers were characterized with a broad portfolio of characterization techniques such as scanning electron microscopy, transmission electron microscopy, grazing incidence small angle X-ray scattering and X-ray diffraction. The results revealed a continuous evolution of the Pt layer morphology from a thin-film-like layer of tightly packed Pt nanoparticles to a deposit composed of dispersed particles of 5-7 nm in size as the Ar pressure increased. The electrochemically active surface area of deposited Pt, as calculated from cyclic voltammograms, increased with deposition pressure from 11.7 m(2)center dot g(Pt)(-1) to 22.3 m(2)center dot g(Pt)(-1) and 24 m(2)center dot g(Pt)(-1) for Pt deposited at 0.3, 3.2 and 57 Pa, respectively. This increase in active sites was reflected in a significant improvement in the mass activity of platinum exemplary confirmed using a methanol electrooxidation reaction.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

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

Surfaces and Interfaces

ISSN

2468-0230

e-ISSN

2468-0230

Svazek periodika

40

Číslo periodika v rámci svazku

Aug

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

103079

Kód UT WoS článku

001058542500001

EID výsledku v databázi Scopus

2-s2.0-85163012883