Single Atoms in Photocatalysis: Low Loading Is Good Enough!

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F23%3A73622715" target="_blank" >RIV/61989592:15640/23:73622715 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.acs.org/doi/10.1021/acsenergylett.2c02801" target="_blank" >https://pubs.acs.org/doi/10.1021/acsenergylett.2c02801</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acsenergylett.2c02801" target="_blank" >10.1021/acsenergylett.2c02801</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Single Atoms in Photocatalysis: Low Loading Is Good Enough!

Popis výsledku v původním jazyce

We disperse Pt single atoms (SAs) with different loading densities on anatase TiO2 thin films and evaluate the photocatalytic H-2 generation as a function of the incident light intensity. We show that under common illumination intensities (such as terrestrial solar illumination), a minuscule Pt SA loading of similar to 10(5) atoms mu m(-2) (surface Pt content similar to 0.1 at.%) is sufficient to achieve a maximized H-2 production rate. This results in a maximum turnover frequency at a single Pt atom site of similar to 300 H-2 molecules s(-1). For a vast majority of illumination conditions and a suitable surface configuration, it is not the density of co-catalytic sites that is rate-determining (a high loading is not needed!), but the charge carrier generation (and flux of photoelectrons to the co-catalytic centers) determines the overall reaction rate. This is in stark contrast to SA catalysis of classic chemical reactions where generally a maximum loading of reactive SA delivers a maximum activity.

Název v anglickém jazyce

Single Atoms in Photocatalysis: Low Loading Is Good Enough!

Popis výsledku anglicky

We disperse Pt single atoms (SAs) with different loading densities on anatase TiO2 thin films and evaluate the photocatalytic H-2 generation as a function of the incident light intensity. We show that under common illumination intensities (such as terrestrial solar illumination), a minuscule Pt SA loading of similar to 10(5) atoms mu m(-2) (surface Pt content similar to 0.1 at.%) is sufficient to achieve a maximized H-2 production rate. This results in a maximum turnover frequency at a single Pt atom site of similar to 300 H-2 molecules s(-1). For a vast majority of illumination conditions and a suitable surface configuration, it is not the density of co-catalytic sites that is rate-determining (a high loading is not needed!), but the charge carrier generation (and flux of photoelectrons to the co-catalytic centers) determines the overall reaction rate. This is in stark contrast to SA catalysis of classic chemical reactions where generally a maximum loading of reactive SA delivers a maximum activity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)

Projekt

<a href="/cs/project/EF15_003%2F0000416" target="_blank" >EF15_003/0000416: Pokročilé hybridní nanostruktury pro aplikaci v obnovitelných zdrojích energie</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

ACS Energy Letters

ISSN

2380-8195

e-ISSN

—

Svazek periodika

8

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

"1209 "- 1214

Kód UT WoS článku

000926703000001

EID výsledku v databázi Scopus

2-s2.0-85147314246