Facet-Control versus Co-Catalyst-Control in Photocatalytic H-2 Evolution from Anatase TiO2 Nanocrystals
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15640%2F22%3A73618660" target="_blank" >RIV/61989592:15640/22:73618660 - isvavai.cz</a>
Výsledek na webu
<a href="https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/open.202200010" target="_blank" >https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/open.202200010</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/open.202200010" target="_blank" >10.1002/open.202200010</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Facet-Control versus Co-Catalyst-Control in Photocatalytic H-2 Evolution from Anatase TiO2 Nanocrystals
Popis výsledku v původním jazyce
Titanium dioxide (TiO2) and, in particular, its anatase polymorph, is widely studied for photocatalytic H-2 production. In the present work, we examine the importance of reactive facets of anatase crystallites on the photocatalytic H-2 evolution from aqueous methanol solutions. For this, we synthesized anatase TiO2 nanocrystals with a large amount of either {001} facets, that is, nanosheets, or {101} facets, that is, octahedral nanocubes, and examined their photocatalytic H-2 evolution and then repeated this procedure with samples where Pt co-catalyst is present on all facets. Octahedral nanocubes with abundant {101} facets produce >4 times more H-2 than nanosheets enriched in {001} facets if the reaction is carried out under co-catalyst-free conditions. For samples that carry Pt co-catalyst on both {001} and {101} facets, faceting loses entirely its significance. This demonstrates that the beneficial role of faceting, namely the introduction of {101} facets that act as electron transfer mediator is relevant only for co-catalyst-free TiO2 surfaces.
Název v anglickém jazyce
Facet-Control versus Co-Catalyst-Control in Photocatalytic H-2 Evolution from Anatase TiO2 Nanocrystals
Popis výsledku anglicky
Titanium dioxide (TiO2) and, in particular, its anatase polymorph, is widely studied for photocatalytic H-2 production. In the present work, we examine the importance of reactive facets of anatase crystallites on the photocatalytic H-2 evolution from aqueous methanol solutions. For this, we synthesized anatase TiO2 nanocrystals with a large amount of either {001} facets, that is, nanosheets, or {101} facets, that is, octahedral nanocubes, and examined their photocatalytic H-2 evolution and then repeated this procedure with samples where Pt co-catalyst is present on all facets. Octahedral nanocubes with abundant {101} facets produce >4 times more H-2 than nanosheets enriched in {001} facets if the reaction is carried out under co-catalyst-free conditions. For samples that carry Pt co-catalyst on both {001} and {101} facets, faceting loses entirely its significance. This demonstrates that the beneficial role of faceting, namely the introduction of {101} facets that act as electron transfer mediator is relevant only for co-catalyst-free TiO2 surfaces.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
21001 - Nano-materials (production and properties)
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2022
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
ChemistryOpen
ISSN
2191-1363
e-ISSN
2191-1363
Svazek periodika
11
Číslo periodika v rámci svazku
3
Stát vydavatele periodika
DE - Spolková republika Německo
Počet stran výsledku
6
Strana od-do
"nečíslováno"
Kód UT WoS článku
000750392800001
EID výsledku v databázi Scopus
2-s2.0-85124083601