Low-temperature synthesis and electrocatalytic application of large-area PtTe(2)thin films

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F20%3APU137553" target="_blank" >RIV/00216305:26620/20:PU137553 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/20:43920507

Výsledek na webu

<a href="https://iopscience.iop.org/article/10.1088/1361-6528/ab9973" target="_blank" >https://iopscience.iop.org/article/10.1088/1361-6528/ab9973</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1361-6528/ab9973" target="_blank" >10.1088/1361-6528/ab9973</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Low-temperature synthesis and electrocatalytic application of large-area PtTe(2)thin films

Popis výsledku v původním jazyce

The synthesis of transition metal dichalcogenides (TMDs) has been a primary focus for 2D nanomaterial research over the last 10 years, however, only a small fraction of this research has been concentrated on transition metal ditellurides. In particular, nanoscale platinum ditelluride (PtTe2) has rarely been investigated, despite its potential applications in catalysis, photonics and spintronics. Of the reports published, the majority examine mechanically-exfoliated flakes from chemical vapor transport (CVT) grown crystals. This method produces high quality-crystals, ideal for fundamental studies. However, it is very resource intensive and difficult to scale up meaning there are significant obstacles to implementation in large-scale applications. In this report, the synthesis of thin films of PtTe(2)through the reaction of solid-phase precursor films is described. This offers a production method for large-area, thickness-controlled PtTe2, potentially suitable for a number of applications. These polycrystalline PtTe(2)films were grown at temperatures as low as 450 degrees C, significantly below the typical temperatures used in the CVT synthesis methods. Adjusting the growth parameters allowed the surface coverage and morphology of the films to be controlled. Analysis with scanning electron- and scanning tunneling microscopy indicated grain sizes of above 1 mu m could be achieved, comparing favorably with typical values of similar to 50 nm for polycrystalline films. To investigate their potential applicability, these films were examined as electrocatalysts for the hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR). The films showed promising catalytic behavior, however, the PtTe(2)was found to undergo chemical transformation to a substoichiometric chalcogenide compound under ORR conditions. This study shows while PtTe(2)is stable and highly useful for in HER, this property does not apply to ORR, which undergoes a fundamentally different mechanism. Th

Název v anglickém jazyce

Low-temperature synthesis and electrocatalytic application of large-area PtTe(2)thin films

Popis výsledku anglicky

The synthesis of transition metal dichalcogenides (TMDs) has been a primary focus for 2D nanomaterial research over the last 10 years, however, only a small fraction of this research has been concentrated on transition metal ditellurides. In particular, nanoscale platinum ditelluride (PtTe2) has rarely been investigated, despite its potential applications in catalysis, photonics and spintronics. Of the reports published, the majority examine mechanically-exfoliated flakes from chemical vapor transport (CVT) grown crystals. This method produces high quality-crystals, ideal for fundamental studies. However, it is very resource intensive and difficult to scale up meaning there are significant obstacles to implementation in large-scale applications. In this report, the synthesis of thin films of PtTe(2)through the reaction of solid-phase precursor films is described. This offers a production method for large-area, thickness-controlled PtTe2, potentially suitable for a number of applications. These polycrystalline PtTe(2)films were grown at temperatures as low as 450 degrees C, significantly below the typical temperatures used in the CVT synthesis methods. Adjusting the growth parameters allowed the surface coverage and morphology of the films to be controlled. Analysis with scanning electron- and scanning tunneling microscopy indicated grain sizes of above 1 mu m could be achieved, comparing favorably with typical values of similar to 50 nm for polycrystalline films. To investigate their potential applicability, these films were examined as electrocatalysts for the hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR). The films showed promising catalytic behavior, however, the PtTe(2)was found to undergo chemical transformation to a substoichiometric chalcogenide compound under ORR conditions. This study shows while PtTe(2)is stable and highly useful for in HER, this property does not apply to ORR, which undergoes a fundamentally different mechanism. Th

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/GX19-26896X" target="_blank" >GX19-26896X: Elektrochemie 2D Nanomateriálů</a><br>

Návaznosti

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

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Nanotechnology

ISSN

0957-4484

e-ISSN

1361-6528

Svazek periodika

31

Číslo periodika v rámci svazku

37

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

„375601-1“-„375601-12“

Kód UT WoS článku

000548856100001

EID výsledku v databázi Scopus

2-s2.0-85087532375