Hydrogen sensing capabilities of highly nanoporous black gold films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F23%3A43928272" target="_blank" >RIV/60461373:22340/23:43928272 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/24:00585975 RIV/00216208:11320/24:10491830

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0169433223022985?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0169433223022985?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apsusc.2023.158618" target="_blank" >10.1016/j.apsusc.2023.158618</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hydrogen sensing capabilities of highly nanoporous black gold films

Popis výsledku v původním jazyce

Hydrogen sensing is a crucial topic for many industrial and environmental applications regarding the green deal and the use of hydrogen as a next-generation energy source/energy-storage medium. Therefore, many different approaches are being used to find sensitive, reliable and inexpensive devices for hydrogen detection. One such approach is the use of chemiresistive nanostructured materials that provide a large surface area for hydrogen adsorption. In this paper, we present a detailed study of the hydrogen sensing capabilities of highly nanoporous black gold films that show fast response and recovery times (0.5 min) while operating at low temperatures (40 °C). To investigate the sensing properties of black gold, films with different levels of nanoporosity were prepared and tested to a hydrogen concentration in the range of 0.25–0.95 %. Film morphology was characterised by AFM, SEM and XPS. To correctly examine the nanopores and defects in prepared films, Variable Energy Positron Annihilation Spectroscopy (VEPAS) was used. We found that nanoporous black gold is suitable as an active layer of chemiresistor for hydrogen sensing and that its sensitivity is the function of the film nanoporosity. Possible mechanisms of hydrogen-gold interactions are discussed. © 2023 Elsevier B.V.

Název v anglickém jazyce

Hydrogen sensing capabilities of highly nanoporous black gold films

Popis výsledku anglicky

Hydrogen sensing is a crucial topic for many industrial and environmental applications regarding the green deal and the use of hydrogen as a next-generation energy source/energy-storage medium. Therefore, many different approaches are being used to find sensitive, reliable and inexpensive devices for hydrogen detection. One such approach is the use of chemiresistive nanostructured materials that provide a large surface area for hydrogen adsorption. In this paper, we present a detailed study of the hydrogen sensing capabilities of highly nanoporous black gold films that show fast response and recovery times (0.5 min) while operating at low temperatures (40 °C). To investigate the sensing properties of black gold, films with different levels of nanoporosity were prepared and tested to a hydrogen concentration in the range of 0.25–0.95 %. Film morphology was characterised by AFM, SEM and XPS. To correctly examine the nanopores and defects in prepared films, Variable Energy Positron Annihilation Spectroscopy (VEPAS) was used. We found that nanoporous black gold is suitable as an active layer of chemiresistor for hydrogen sensing and that its sensitivity is the function of the film nanoporosity. Possible mechanisms of hydrogen-gold interactions are discussed. © 2023 Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

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)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

APPLIED SURFACE SCIENCE

ISSN

0169-4332

e-ISSN

1873-5584

Svazek periodika

647

Číslo periodika v rámci svazku

28 February 2024

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

001127440000001

EID výsledku v databázi Scopus

2-s2.0-85178020283